JPH0672060B2 - Corrosion resistant sintered body - Google Patents
Corrosion resistant sintered bodyInfo
- Publication number
- JPH0672060B2 JPH0672060B2 JP63249787A JP24978788A JPH0672060B2 JP H0672060 B2 JPH0672060 B2 JP H0672060B2 JP 63249787 A JP63249787 A JP 63249787A JP 24978788 A JP24978788 A JP 24978788A JP H0672060 B2 JPH0672060 B2 JP H0672060B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- tib
- sintered body
- less
- zrb
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000007797 corrosion Effects 0.000 title claims description 22
- 238000005260 corrosion Methods 0.000 title claims description 22
- 239000000843 powder Substances 0.000 claims description 22
- 239000002994 raw material Substances 0.000 claims description 19
- 238000005245 sintering Methods 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 5
- 239000011651 chromium Substances 0.000 description 20
- 230000003647 oxidation Effects 0.000 description 16
- 238000007254 oxidation reaction Methods 0.000 description 16
- 230000003628 erosive effect Effects 0.000 description 8
- 230000035939 shock Effects 0.000 description 8
- 239000002245 particle Substances 0.000 description 7
- 239000002131 composite material Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000704 physical effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910016006 MoSi Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910006249 ZrSi Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 229910021332 silicide Inorganic materials 0.000 description 2
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- -1 MoSi 2 Chemical compound 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 150000001845 chromium compounds Chemical class 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000009770 conventional sintering Methods 0.000 description 1
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007676 flexural strength test Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000005555 metalworking Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 239000011812 mixed powder Substances 0.000 description 1
- 229910003465 moissanite Inorganic materials 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000001272 pressureless sintering Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Ceramic Products (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ZrB2とTiB2とCr3C2を含んでなる混合原料粉
末を焼結してなる耐食性焼結体に関するものである。Zr
B2やTiB2の硼化物は、高融点、高硬度、高耐食性であ
り、しかも導電性を有するために有望な材料と考えられ
るが極めて難焼結性であるのでほとんど実用化されてい
ない。一方、Cr3C2はその優れた耐食性と耐酸化性を利
用して工業用加熱炉の部材に使用されている。TECHNICAL FIELD The present invention relates to a corrosion-resistant sintered body obtained by sintering a mixed raw material powder containing ZrB 2 , TiB 2 and Cr 3 C 2 . Zr
Borides of B 2 and TiB 2 are considered to be promising materials because they have a high melting point, a high hardness, a high corrosion resistance, and have electrical conductivity, but they are extremely difficult to sinter, so they have hardly been put to practical use. On the other hand, Cr 3 C 2 is used as a member of an industrial heating furnace due to its excellent corrosion resistance and oxidation resistance.
これに対し、本発明の耐食性焼結体は、上記した硼化物
の特性を損わずに耐酸化性に優れたものであるため、溶
融金属に対する耐食性部材、機械部品、発熱体、電極等
への利用が期待されるものである。On the other hand, the corrosion-resistant sintered body of the present invention is excellent in oxidation resistance without deteriorating the characteristics of the boride described above, and thus can be applied to corrosion-resistant members against molten metal, machine parts, heating elements, electrodes, etc. Is expected to be used.
ZrB2、TiB2の焼結体については古くから研究され特許出
願も多いがそれ程実用化されていない。ZrB2について
は、焼結助剤（複合材）として、MoSi2，ZrSi2などの珪
化物、SiC,B4C,WCなどの炭化物、BN、AlN,HfNなどの窒
化物、ZrO2などの酸化物及び金属粉などを添加して焼結
することが知られている。一方、TiB2については、金属
粉や炭化タングステン系超硬合金が使用されている。
（特開昭61−44768号公報）。ZrB 2 and TiB 2 sintered bodies have been studied for a long time and many patent applications have been made, but they have not been put to practical use. Regarding ZrB 2 , as sintering aid (composite material), silicide such as MoSi 2 , ZrSi 2 , carbide such as SiC, B 4 C, WC, nitride such as BN, AlN, HfN, ZrO 2 etc. It is known to add an oxide and a metal powder and sinter. On the other hand, for TiB 2 , metal powder or tungsten carbide based cemented carbide is used.
(JP-A 61-44768).
しかし、焼結助剤として、MoSi2,ZrSi2などの珪化物や
金属粉を使用すると高温下で分解し易く、強度、耐食
性、耐酸化性に劣る。窒化物は一般に硬度と強度は良い
が耐酸化性、耐熱衝撃性、耐食性が充分でない。酸化物
ではZrO2が挙げられるが正方晶単斜晶転移により高温
酸化性雰囲気下での使用では強度低下が起こるだけでな
く耐酸化性の点でも問題が残る。炭化物としては、SiC,
B4C,WC等が開示されているが耐酸化性が不充分である。However, when a silicide or a metal powder such as MoSi 2 or ZrSi 2 is used as a sintering aid, it is easily decomposed at high temperature, and the strength, corrosion resistance and oxidation resistance are poor. Nitride generally has good hardness and strength, but has insufficient oxidation resistance, thermal shock resistance, and corrosion resistance. As the oxide, ZrO 2 can be mentioned, but when it is used in a high temperature oxidizing atmosphere due to the tetragonal monoclinic transition, not only the strength is lowered but also the oxidation resistance remains a problem. As the carbide, SiC,
Although B 4 C, WC, etc. are disclosed, their oxidation resistance is insufficient.
以上のように、従来の焼結助剤では幾つかの欠点を有す
るためにZrB2，TiB2の長所を充分に生かした形での実用
化はまだ実現していない。本発明はZrB2及びTiB2を組み
合せた硼化物を主成分としてこれにCr3C2を含ませた混
合粉末を原料とすることによってこれらの欠点を解決す
ることに成功したものである。As described above, since the conventional sintering aids have some drawbacks, they have not yet been put into practical use in a form in which the advantages of ZrB 2 and TiB 2 are fully utilized. The present invention has succeeded in solving these drawbacks by using, as a raw material, a mixed powder in which ZrB 2 and TiB 2 are combined as a main component and Cr 3 C 2 is contained therein.
即ち、本発明は、以下を要旨とする耐食性焼結体であ
る。That is, the present invention is a corrosion-resistant sintered body having the following gist.
1.実質的にZrB2とTiB2とCr3C2からなり、その重量比がZ
rB2：TiB2：Cr3C2＝94.5〜5:94.5〜5:0.5〜50で合計100
であるものを含有してなる混合原料粉末を焼結してなる
ことを特徴とする耐食性焼結体。1. It consists essentially of ZrB 2 , TiB 2 and Cr 3 C 2 , and its weight ratio is Z
rB 2 : TiB 2 : Cr 3 C 2 = 94.5 to 5: 94.5 to 5: 0.5 to 50 for a total of 100
A corrosion-resistant sintered body, which is obtained by sintering a mixed raw material powder containing
2.混合原料粉末が、BN,AIN,B4C,SiC及びTiCから選ばれ
た少なくとも１種をそれらの合計で50重量％以下をさら
に含有してなり、しかも、BNについては40重量％以下、
AlNとB4Cについては各々25重量％以下、SiCとTiCについ
ては各々15重量％以下であることを特徴とする請求項１
記載の耐食性焼結体。2. The mixed raw material powder further contains at least one selected from BN, AIN, B 4 C, SiC, and TiC in a total amount of 50% by weight or less, and 40% by weight or less for BN. ,
Amounts of AlN and B 4 C are each 25% by weight or less, and SiC and TiC are each 15% by weight or less.
The corrosion resistant sintered body described.
以下、さらに詳しくは本発明について説明する。Hereinafter, the present invention will be described in more detail.
本発明に用いる原料は次のとおりである。「実質的」と
は、ZrB2とTiB2とCr3C2は必ずしも純度が100％でなくと
もよいことを意味し、例えばCr3C2にはCr7C3,Cr4C等の
炭化クロム化合物やCr,Cが含まれていてもよい。ZrB2と
TiB2とCr3C2は共に純度99％以上が好ましく、、平均粒
径は10μｍ以下好ましくは１μｍ以下である。また、複
合材として添加するBN,AlN,B4C,SiC,TiCについても純度
99％以上，平均粒径10μｍ以下が好ましい。The raw materials used in the present invention are as follows. By “substantially” is meant that ZrB 2 , TiB 2 and Cr 3 C 2 do not necessarily have to be 100% pure, for example Cr 3 C 2 can be carbonized with Cr 7 C 3 , Cr 4 C, etc. It may contain a chromium compound, Cr, or C. ZrB 2 and
The purity of both TiB 2 and Cr 3 C 2 is preferably 99% or more, and the average particle size is 10 μm or less, preferably 1 μm or less. Also, BN to be added as a composite material, AlN, B 4 C, SiC , purity about TiC
The average particle size is preferably 99% or more and 10 μm or less.
原料の混合はZrB2，TiB2及びCr3C2の微粉末を混合する
方法や同時に粉砕混合する方法が採用され、粉砕方法と
しては乾式・湿式のいずれであってもよい。混合原料粉
末の粒度としては平均粒径10μｍ以下好ましくは５μｍ
以下特に１μｍ以下である。The raw materials are mixed by a method of mixing fine powders of ZrB 2 , TiB 2 and Cr 3 C 2 or a method of simultaneously pulverizing and mixing, and the pulverizing method may be either dry or wet. The average particle size of the mixed raw material powder is 10 μm or less, preferably 5 μm
In particular, it is 1 μm or less.
本発明の耐食性焼結体は、真空中、アルゴン、ヘリウ
ム、窒素などの中性あるいは還元性の雰囲気下で上記混
合原料粉末をホットプレス法かプレス成形、CIP成形後
常圧焼結法によって得ることができる。焼成温度は1,40
0〜2,200℃焼成時間は30分〜６時間程度であり、原料組
成と原料粒度により適当な条件を選択する。またHIP法
も有効である。The corrosion-resistant sintered body of the present invention is obtained by hot-pressing or press-molding the mixed raw material powder in a vacuum or in a neutral or reducing atmosphere such as argon, helium, or nitrogen, and then by pressureless sintering after CIP molding. be able to. Firing temperature is 1,40
The firing time at 0 to 2,200 ° C. is about 30 minutes to 6 hours, and an appropriate condition is selected depending on the raw material composition and the raw material particle size. The HIP method is also effective.
本発明では、混合原料粉末中のZrB2：TiB2：Cr3C2の重
量比を94.5〜5:94.5〜5:0.5〜50で合計100とするが、Zr
B2及びTiB2の重量比が上記割合よりも小さいとZrB2とTi
B2の特性を充分に発揮できない。また、Cr3C2の重量比
が上記よりも小さいと焼結助剤としての効果はほとんど
なく、一方、上記割合よりも大きいとZrB2及びTiB2から
なる硼化物の特性が損われる。本発明では、混合原料粉
末中に上記割合からなるZrB2，TiB2及びCr3C2を合計で5
0重量％以上含ませることにより、ZrB2とTiB2の硼化物
とCr3C2とが相互に焼結を促進し合い優れた焼結体を製
造することができるものである。In the present invention, the weight ratio of ZrB 2 : TiB 2 : Cr 3 C 2 in the mixed raw material powder is 94.5 to 5: 94.5 to 5: 0.5 to 50, which is 100 in total.
If the weight ratio of B 2 and TiB 2 is smaller than the above ratio, ZrB 2 and Ti
The characteristics of B 2 cannot be fully exhibited. On the other hand, if the weight ratio of Cr 3 C 2 is smaller than the above value, there is almost no effect as a sintering aid, while if it is more than the above ratio, the characteristics of the boride composed of ZrB 2 and TiB 2 are impaired. In the present invention, ZrB 2 , TiB 2 and Cr 3 C 2 having the above proportions in the mixed raw material powder are added in a total amount of 5
By containing 0 wt% or more, the boride of ZrB 2 and TiB 2 and Cr 3 C 2 mutually promote the sintering, and an excellent sintered body can be manufactured.
本発明の耐食性焼結体を製造する際に用いられる混合原
料粉末は、上記したZrB2とTiB2とCr3C2の混合物以外
に、BN,AlN,B４C,SiC及びTiCから選ばれた少なくとも１
種の複合材をそれらの合計量として50重量％以下をさら
に含ませることができる。BNは、耐熱衝撃性の改善に用
いるものであり、その混合原料粉末中の含有量は強度低
下をなくするために40重量％以下好ましくは25重量％以
下特に５〜20重量％である。AlN,B4C及びTiCは、硬度向
上のために用いられるものであり、その混合原料粉末中
の含有量は、AlNとB4Cについては各々25重量％以下好ま
しくは５〜20重量％であり、TiCについては15重量％以
下好ましくは５〜10重量％である。これらの複合材の含
有量が上記よりも多すぎると特に耐酸化性が低下する。
一方、SiCは、耐酸化性を向上させるために用いられる
ものであるが、多すぎると耐熱衝撃性や耐食性が悪くな
るので、その混合原料粉末中の含有量は15重量％以下好
ましくは５〜10重量％である。なお、これらの複合材の
合計含有量としては50重量％以下である。これを越える
と硼化物の特性が損われる。The mixed raw material powder used when manufacturing the corrosion resistant sintered body of the present invention is selected from BN, AlN, B 4 C, SiC and TiC in addition to the above-mentioned mixture of ZrB 2 , TiB 2 and Cr 3 C 2. At least 1
Seed composites may further be included up to 50% by weight in their total amount. BN is used for improving the thermal shock resistance, and its content in the mixed raw material powder is 40% by weight or less, preferably 25% by weight or less, and particularly 5 to 20% by weight in order to prevent the decrease in strength. AlN, B 4 C and TiC are used for improving the hardness, and the content of the mixed raw material powder is 25% by weight or less, preferably 5 to 20% by weight for AlN and B 4 C, respectively. The content of TiC is 15% by weight or less, preferably 5 to 10% by weight. If the content of these composite materials is too large, the oxidation resistance will be lowered.
On the other hand, SiC is used for improving the oxidation resistance, but since the thermal shock resistance and the corrosion resistance deteriorate if it is too much, the content in the mixed raw material powder is 15% by weight or less, preferably 5 to 10% by weight. The total content of these composite materials is 50% by weight or less. Above this, the boride properties are impaired.
本発明の耐食性焼結体を製造するには、上記した混合原
料粉末にさらにAl2O3，SiO2,MgO,SiC,B4C，Si3N4等のウ
イスカー及びファイバーを混入することも可能であり、
それによって耐衝撃性、耐熱衝撃性、破壊靱性等の物性
をさらに向上させることができる。In order to produce the corrosion-resistant sintered body of the present invention, whiskers and fibers such as Al 2 O 3 , SiO 2 , MgO, SiC, B 4 C and Si 3 N 4 may be further mixed in the above-mentioned mixed raw material powder. Is possible,
Thereby, physical properties such as impact resistance, thermal shock resistance, and fracture toughness can be further improved.
実施例１ 純度99％以上のZrB2，TiB2粉末（平均粒径３〜４μｍ）
とCr3C2粉末（平均粒径４〜５μｍ）をボールミルで混
合した後CIP（2.7ton/cm2、３分間）成型し、真空雰囲
気下において所定の温度、時間で焼成した。得られた焼
結体の物性を表−１に示す。なお、表の物性は次のよう
にして測定した。Example 1 ZrB 2 and TiB 2 powders with a purity of 99% or more (average particle size 3 to 4 μm)
And Cr 3 C 2 powder (average particle size 4 to 5 μm) were mixed in a ball mill, then CIP (2.7 ton / cm 2 , 3 minutes) was molded, and fired at a predetermined temperature and time in a vacuum atmosphere. Table 1 shows the physical properties of the obtained sintered body. The physical properties in the table were measured as follows.
（１）耐熱衝撃性は急冷強度測定法で求めた。供試体は
３×４×40mmの曲げ強度試験片を用い電気炉内で所定温
度加熱し、一定時間保持後炉の下に設置してある０℃の
水中へ降下させて試験片を急冷した。その試験片の曲げ
強度を測定し強度が低下したときの加熱温度と水の温度
（０℃）との差を△Ｔとした。(1) Thermal shock resistance was determined by a quenching strength measurement method. The test piece was a flexural strength test piece of 3 × 4 × 40 mm, which was heated at a predetermined temperature in an electric furnace, held for a certain period of time, and then lowered into water at 0 ° C. installed under the furnace to rapidly cool the test piece. The bending strength of the test piece was measured, and the difference between the heating temperature and the water temperature (0 ° C.) when the strength decreased was ΔT.
（２）耐食性は３×４×40mmの試験片を1600℃、１時間
Ar雰囲気下でSS-41鋼の溶湯に浸漬し、その侵食率
（％）を（侵食された容積／試験片の容積）×100に従
って算出し、その侵食率に応じて以下の３段階で評価し
た。(2) Corrosion resistance is 1600 ℃ for 1 hour at 3 × 4 × 40mm test piece
It was immersed in a molten SS-41 steel under Ar atmosphere, and its erosion rate (%) was calculated according to (eroded volume / volume of test piece) x 100 and evaluated according to the erosion rate in the following three stages. did.
○…侵食なし（侵食率０％） △…やや侵食（侵食率10％未満） ×…かなり侵食（侵食率10％以上） 表−１より、本発明例（実験No.5〜12）は、比較例（実
験No.1〜４）に比べて、耐食性、耐熱衝撃性、強度、密
度は共に優れたものであることがわかる。○: No erosion (erosion rate 0%) △: Slight erosion (erosion rate less than 10%) ×… Significant erosion (erosion rate 10% or more) Table 1 shows that the inventive examples (Experiment Nos. 5 to 12) are superior in corrosion resistance, thermal shock resistance, strength, and density as compared with Comparative Examples (Experiment Nos. 1 to 4). Recognize.
実施例２ 実施例１の実験No.5の配合のZrB2、TiB2、Cr3C2粉末及
び純度99％以上のBN,AlN,B４C,SiC,TiC粉末（平均粒径
４〜５μｍ）を所定量計量後乳針で手混合したものをCI
P成型（2.8ton/cm2、３分間）後、温度1900℃の真空中
で180分間常圧焼成した。その物性を表−２に示す。Example ZrB 2 formulation of 2 Experimental Example 1 No.5, TiB 2, Cr 3 C 2 powder and a purity of 99% or more of BN, AlN, B 4 C, SiC, TiC powder (mean particle diameter 4~5μm ) Was weighed in a predetermined amount and hand-mixed with a milk needle.
After P molding (2.8 ton / cm 2 , 3 minutes), it was fired at normal pressure in a vacuum at a temperature of 1900 ° C. for 180 minutes. The physical properties are shown in Table 2.
なお、BN,AlN,B４C,SiC,TiCの複合材の含有量はZrB28
0、TiB210及びCr3C210の重量比からなる混合物に対する
内割の重量％で示してある。また、表−２の耐酸化性
は、酸化雰囲気下1200℃、12時間の条件で熱処理した際
の酸化増量（mg/cm2）を測定し、その程度に応じて以下
の４段階で評価した。The content of the composite material of BN, AlN, B 4 C, SiC, TiC is ZrB 2 8
0, is indicated by the inner split weight percent of a mixture consisting by weight of TiB 2 10 and Cr 3 C 2 10. In addition, the oxidation resistance in Table 2 was evaluated by measuring the increase in oxidation (mg / cm 2 ) when heat-treated in an oxidizing atmosphere at 1200 ° C. for 12 hours, and evaluated according to the degree according to the following four grades. .
◎…酸化増量0.3mg/cm2未満 ○…酸化増量0.3mg/cm2以上1mg/cm2未満 △…酸化増量1mg/cm2以上5mg/cm2未満 ×…酸化増量5mg/cm2以上 表−２から、BNの添加により耐熱衝撃性、AlN,B4C又はT
iCの添加により硬度、そしてSiCの添加により耐酸化性
がそれぞれ改善され、いずれの焼結体においても耐食性
が良好であることが確認された。◎… Oxidation increase of less than 0.3 mg / cm 2 ○… Oxidation increase of 0.3 mg / cm 2 or more and less than 1 mg / cm 2 △… Oxidation increase of 1 mg / cm 2 or more and less than 5 mg / cm 2 ×… Oxidation increase of 5 mg / cm 2 or more From Table-2, by adding BN, thermal shock resistance, AlN, B 4 C or T
It was confirmed that the hardness was improved by adding iC and the oxidation resistance was improved by adding SiC, and that the corrosion resistance was good in any sintered body.
本発明の耐食性焼結体は、緻密で強度、硬度、耐食性、
耐酸化性、耐熱衝撃性に優れた性質を有するものである
ので、例えば、アモルファス合金製造用急冷凝固法治具
（ノズル、堰材）、金属加工用押出ダイス、金属あるい
はガラス溶解用治具（ルツボ、型材）、ガスアーク溶接
機用等高温下で使用される電極、鉄鋼関連の保護管、レ
ベルセンサーなどの用途が考えられる。The corrosion-resistant sintered body of the present invention is dense, strength, hardness, corrosion resistance,
Since it has excellent oxidation resistance and thermal shock resistance, for example, a rapid solidification method jig for producing amorphous alloy (nozzle, weir material), extrusion die for metal working, jig for melting metal or glass (crucible) , Mold materials), electrodes used under high temperature for gas arc welding machines, steel-related protection tubes, level sensors, etc.
Claims (2)
の重量比がZrB2：TiB2：Cr3C2＝94.5〜5:94.5〜5:0.5〜
50で合計100であるものを含有してなる混合原料粉末を
焼結して得られたものであることを特徴とする耐食性焼
結体。1. A composition comprising ZrB 2 , TiB 2 and Cr 3 C 2 and having a weight ratio of ZrB 2 : TiB 2 : Cr 3 C 2 = 94.5 to 5: 94.5 to 5: 0.5 to
A corrosion-resistant sintered body, which is obtained by sintering a mixed raw material powder containing 50 in total of 100.
から選ばれた少なくとも１種をそれらの合計で50重量％
以下をさらに含有してなり、しかも、BNについては40重
量％以下、AlNとB4Cについては各々25重量％以下、SiC
とTiCについては各々15重量％以下であることを特徴と
する請求項１記載の耐食性焼結体。2. The mixed raw material powder is BN, AIN, B 4 C, SiC and TiC.
50% by weight in total of at least one selected from
It further contains: 40% by weight or less for BN, 25% by weight or less for each of AlN and B 4 C, SiC
The corrosion-resistant sintered body according to claim 1, wherein the content of TiC and the content of TiC are each 15% by weight or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63249787A JPH0672060B2 (en) | 1987-10-06 | 1988-10-05 | Corrosion resistant sintered body |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25073087 | 1987-10-06 | ||
| JP62-250730 | 1987-10-06 | ||
| JP63249787A JPH0672060B2 (en) | 1987-10-06 | 1988-10-05 | Corrosion resistant sintered body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01201079A JPH01201079A (en) | 1989-08-14 |
| JPH0672060B2 true JPH0672060B2 (en) | 1994-09-14 |
Family
ID=26539489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63249787A Expired - Lifetime JPH0672060B2 (en) | 1987-10-06 | 1988-10-05 | Corrosion resistant sintered body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0672060B2 (en) |
-
1988
- 1988-10-05 JP JP63249787A patent/JPH0672060B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01201079A (en) | 1989-08-14 |
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