JPS6035984B2 - Iron-based sintered alloy spinning machine ring - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a spinning machine ring made of iron-based alloy that has excellent wear resistance and lubricity, and therefore hardly causes thread breakage or thread staining during use.

Conventionally, spinning machine rings are generally made of Fe-3%Cu phosphorous alloy, Fe-2%Cu-2%Ni sintered alloy, Fe-3%Cu
-2% Mo-aged alloy, or Fe-2%Cu-2%N
Made of i-2%M sintered alloy, and oil content: 10-2
9% by volume and is manufactured from an iron-based alloy having a surface hardening layer formed by surface hardening treatment such as carburizing and quenching and carbonitriding.

However, these spinning loom rings made of iron-based sintered alloy suffer from significant wear during use, and as a result, when the spinning machine stops, thread contamination occurs due to abrasion powder adhering to the ring surface, which is caused by abrasion powder on the brackets. Due to various factors, the lubricity on the thread ring surface deteriorates, resulting in frequent thread breakage.

Therefore, attempts have been made to use various materials with excellent wear resistance in the manufacture of spinning loom rings, but in this case, spinning loom rings do not necessarily show good results in terms of wear resistance and lubricity. Therefore, the current situation is that simply improving the abrasion resistance cannot completely prevent the occurrence of thread breakage and thread staining.

From the above-mentioned viewpoints, the inventors of the present invention aimed to obtain a spinning loom ring that does not cause thread contamination when the spinning machine is stopped or generates abrasion powder that causes thread breakage, and has excellent lubricity. In particular, as a result of research into the material, we found that the oil content was 10 to 2.
In addition to the string capacity %, the component composition is Ni: 1 to 5%, Cr: 0.2 to 3%, Cu: 1 to 5%, S: 0. 2 to 3% and Mo: 0.2 to 3%, and the remainder is Fe and unavoidable impurities. ), it was found that the resulting iron-based sintered alloy spinning machine ring exhibits excellent performance with extremely few problems such as those described above during use.

This invention was made based on the above knowledge, and the reason why the component composition range was limited as described above will be explained.

'a} Ni The Ni component not only hardens into the substrate and strengthens it, but also
It has the effect of improving hardenability and conformability, but if the content is less than 1%, the desired effect cannot be obtained, while if the content exceeds 5%, the hardness will increase. The content was determined to be 1 to 5% because the wear resistance deteriorated.

[b-Cr Cr component is dissolved in the base material to strengthen it and improve wear resistance, and also to form Cr carbide to the surface during surface hardening treatment such as carburizing or carbonitriding. It has the effect of further improving wear resistance, but its content is 0.
．． If the content is less than 2%, the desired effect cannot be obtained, while if the content exceeds 3%, the numerical properties will deteriorate, so the content was set at 0.2 to 3%.

{c) The CuCu component contains solid solution in the base material like Ni,
Since it has the effect of reinforcing this, it is included as necessary when particularly strong strength is required, but if the content is less than 1%, the desired strength improvement effect cannot be obtained;
If the content exceeds 1%, the hardness decreases like Ni, so the content was set at 1 to 5%.

'd}S The S component has the effect of forming metal sulfides to improve lubricity and conformability, and is included as necessary when these properties are required, but its content is 0.
If the content is less than 2%, the desired effect of improving the properties cannot be obtained, while if the content exceeds 3%, the strength will decrease, so the content was determined to be 0.2 to 3%.

[e} Mo Mo component has the effect of strengthening the base material and improving wear resistance and conformability, so it is included as necessary when these properties are required, but its content is is 0
．． If the content is less than 2%, the desired improvement effect cannot be obtained, while if the content exceeds 3%, the machinability deteriorates, so the content was determined to be 0.2 to 3%.

In addition, in the spinning machine ring of this invention, the oil content is 10
The reason why the oil content is less than 1% by volume is that it is not possible to secure the desired lubricity;
This is because if the oil content exceeds 100%, the strength and abrasion resistance will deteriorate significantly, and the amount of oil bleeding will increase, causing thread staining.

Next, the spinning machine ring of the present invention will be explained using examples and comparing with comparative examples.

Example raw material powder: Ni powder with an average powder diameter of 3 m, particle size -1
Fe-Cr alloy (containing 13% Cr) powder of 5mm mesh, reduced iron powder of the same 15mm mesh, electrolytic Cu powder of the same 15mm mesh, Fe-S alloy (s) of the same 15mm mesh.
: 1% content) powder, Mo powder with an average particle size of 3 m, and MoS2 (S: 40% content) powder with a particle size of -20 m are prepared, and these raw material powders were mixed into the compositions shown in Table 1. Then, 0.5% by weight of stearic acid Table 1 zinc powder was added as a lubricant to these blended powders and mixed, and then a green compact was molded at the molding pressure also shown in Table 1. , Subsequently, each of these green compacts was heated in an ammonia decomposition gas at a temperature of 1100 to 1150o.
After tying C under the condition of holding 6 ships, the resulting buoyant body was charged into a carbonitriding furnace, and heated at a temperature of 820 to 850 oo for 6 hours while flowing an ammonia-containing reaction gas into the furnace.
After holding for 0 minutes, oil quenching and further temperature: 180 ~
The spinning loom rings 1 to 1 of the present invention have substantially the same composition as the blended composition by performing tempering treatment at 220o0 for 60 minutes and finally vacuum oil immersion treatment.
8 and Comparative Loom Rings 1-6 were manufactured, respectively.

In addition, for comparative spinning loom rings 1 to 6, either the component composition or oil content is outside the scope of the present invention, and the relevant component content and oil content are marked with *. It is shown in Table 1. Next, the resulting spinning loom rings 1 to 18 of the present invention and comparative spinning loom rings 1 to 6 will be described.
The oil content, surface hardness (Vickers hardness), and radial crushing strength were measured, and the conditions simulated on a practical spinning machine were used: yarn quality: nylon, spindle rotation speed: 200 mm. p. A practical test was carried out under the conditions of operating time: 1 hour, and the number of thread breaks and the state of thread oil staining during the test time were measured and observed.

These results are also shown in Table 1. As is clear from the results shown in Table 1, the spinning loom rings 1 to 1 of the present invention
No. 8 has excellent wear resistance and high strength,
Therefore, the generation of abrasion powder is extremely low, so there is no thread contamination when the spinning loom stops, and there is also very little thread breakage caused by abrasion powder, etc., whereas comparative spinning loom rings 1 to 6 Not only those with low surface hardness, but also those with very high surface hardness have a high number of thread breakages, making them inferior as rings for spinning and looms.

As mentioned above, the spinning loom ring of the present invention has the properties required for a spinning loom ring, so when it is put into practical use, it is industrially useful as it stably exhibits excellent performance over a long period of time. It has certain characteristics.

Claims (1)

[Claims] 1 Contains Ni: 1 to 5%, Cr: 0.2 to 3%, and the remainder is Fe and unavoidable impurities (weight%) and oil content: 10 to 25% by volume. 1. A spinning machine ring made of an iron-based sintered alloy, characterized in that it has a hardened surface layer. 2 Contains Ni: 1 to 5%, Cr: 0.2 to 3%, further contains Cu: 1 to 5%, and the remainder consists of Fe and unavoidable impurities (weight %) and oil content: 10 ~2
5% by volume and a surface hardening layer. 3 Contains Ni: 1 to 5%, Cr: 0.2 to 3%, further contains S: 0.2 to 3%, and the remainder consists of Fe and unavoidable impurities (weight %) and oil content :10～
A spinning machine ring made of an iron-based sintered alloy, characterized by containing 25% by volume and having a surface hardening layer. 4 Contains Ni: 1 to 5%, Cr: 0.2 to 3%, further contains Mo: 0.2 to 3%, and the remainder consists of Fe and inevitable impurities (weight %) and oil content :10
25% by volume and a surface hardening layer. 5 Contains Ni: 1 to 5%, Cr: 0.2 to 3%, further contains Cu: 1 to 5% and S: 0.2 to 3%,
Composition with the remainder consisting of Fe and unavoidable impurities (more than % by weight)
and a spinning machine ring made of an iron-based sintered alloy, characterized in that it has an oil content of 10 to 25% by volume and a hardened surface layer. 6 Contains Ni: 1 to 5%, Cr: 0.2 to 3%, further contains Cu: 1 to 5% and Mo: 0.2 to 3%, with the remainder consisting of Fe and inevitable impurities ( more than weight%
) and an oil content of 10 to 25% by volume and a surface hardening layer. 7 Contains Ni: 1 to 5%, Cr: 0.2 to 3%, further contains S: 0.2 to 3% and Mo: 0.2 to 3%, and the remainder consists of Fe and inevitable impurities. A spinning machine ring made of an iron-based sintered alloy, having a composition (weight %) and an oil content of 10 to 25 volume %, and a surface hardening layer. 8 Contains Ni: 1-5%, Cr: 0.2-3%, further Cu: 1-5%, S: 0.2-3%, and Mo:
0.2 to 3%, with the remainder consisting of Fe and unavoidable impurities (wt%), an oil content of 10 to 25% by volume, and a surface hardening layer. Sintered metal spinning ring.