JPS63310B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (A) [Field of Industrial Application] The present invention relates to a wear-resistant member for the inner wall surface of a hopper or the like into which ore and the like are charged.

(B) [Conventional technology] Conventional potspars into which ore, etc. are introduced are usually made of iron plates, etc., but they suffer from severe wear due to friction when ore, etc. is introduced, and often have to be repaired or replaced.

During this time, equipment shutdowns and maintenance required manpower, resulting in inconveniences such as decreased work efficiency and increased repair costs.

As a method to prevent this wear, methods such as welding special steel to the worn parts have been considered, but considering the cost, it has not been possible to significantly extend the service life.

Methods such as bonding ceramics onto metal substrates using resin adhesives have also been used, but with resin bonding, deterioration over time and peeling due to differences in thermal expansion are inevitable, and the operating temperature is also kept low. There were other inconveniences.

Furthermore, a plate made by metallizing ceramics using a molybdenum manganese method or the like and bonding this to a metal substrate by silver brazing is welded to the worn surface of the hopper.
Methods such as bolting may also be considered, but in this case, a high-temperature atmosphere furnace is required, which requires high equipment costs and many manufacturing steps, resulting in high costs. It is preferable to make the wear-resistant metal substrate itself somewhat large, since the number of sheets used is small, and it is preferable for handling purposes. In metallized bonding by
The influence of stress due to the difference in thermal expansion between the two is large, and large ceramics tend to cause stress cracks and residual stress, making joining difficult.

Even if it were possible, it would be difficult to manufacture and would be expensive and impractical.

(C) [Problems to be solved by the invention] The present invention solves the above-mentioned problems such as wear resistance, aging deterioration,
By solving problems such as low operating temperatures, stress cracking, residual stress, and manufacturing difficulties when using ceramics, as well as economical issues, it has extremely high wear resistance, is resistant to deterioration, and has a usable temperature. It has a high resistance to stress, is less affected by the residual stress of ceramics, and is economical, satisfying the needs of use.
The present invention aims to provide a wear-resistant substrate for a hopper.

(D) [Means for solving the problem] As shown in Fig. 1, the metallized surface 6 of a ceramic plate 3 metalized by ultrasonic vibration excitation in a low-temperature molten alloy 1 such as a Zn alloy, The metal substrate 5 is integrally joined with the low temperature melting alloy 1 to the worn surface of the metal substrate 5 which has the mounting portion 4 provided on the back side.
This is a wear-resistant substrate for poppers that has significantly improved wear resistance by combining Ceramics 3 on the wear surface.

That is, Zn alloy or Pb alloy, e.g. 95Zn−
A ceramic plate 3 having good wear resistance, such as alumina or zirconia, is placed on an ultrasonic vibrator 2 inserted into a low-temperature melting alloy 1 such as 5Al.
By applying ultrasonic vibrations of 1KW and 18KHz to the ultrasonic vibrator 2, the contact surface between the ceramics 3 and the molten alloy 1 undergoes cavitation to form a liquid phase.
The solid-phase interfacial reaction is promoted, and the contact surface of the ceramics 3 with the molten alloy 1 is metalized by the low-temperature molten alloy.

In this case, whether to use a Zn alloy or a Pb alloy may be determined by taking into consideration the operating temperature conditions of the wear-resistant metal for the hopper, and selecting an appropriate low-temperature melting alloy.

Next, as shown in FIG.
A metal substrate 5 having a lower surface thereof is preheated to near the melting point of the molten alloy 1, and the metallized surface 6 of the ceramic 3 described above is placed in a molten state on this and bonded at once. In this case, if necessary, flux is also used on the joining surfaces to facilitate joining.

Furthermore, if the metal substrate 5 is subjected to hot-dip galvanizing or the like in advance, and the metalized ceramics 3 are bonded using the above-mentioned ultrasonic vibration, a very good bond can be obtained, and it is excellent in terms of temperature, mechanical strength, and rust prevention. A wear-resistant substrate for a hopper can be obtained.

The mounting portion of the metal substrate 5 may have a bolted structure using the mounting bolts 4, a welded structure using a mounting rod instead of the mounting bolt 4, or a structure in which the tip of the mounting rod is compressed.

(E) [Effects of the Invention] To describe the effects of the present invention, first, in the present invention, in a molten alloy with a low melting point such as a Zn alloy,
The bonding surface of the ceramics 3 is metallized by ultrasonic vibration excitation, and this metallized surface is integrally bonded to a metal substrate with a mounting part on the back side using a molten alloy with a low melting point, and the ceramics 3 is attached to the worn surface.
By combining these, it has extremely high wear resistance,
In addition, the bonding is uniform and strong at all parts, and the bonded parts will not peel off due to aging deterioration even after long-term use, compared to when bonded with resin.

Further, the operating temperature is also higher than that of resin. For example, when Zn alloy 95Zn-5Al is used for the ceramic 3, the melting temperature is 382°C, making it possible to use it under considerably high temperature conditions. .

Moreover, since the wear surface is uniformly composited with ceramics over the entire surface, the ceramics 3 will not break or break even when subjected to impact from ores, etc.
It can withstand long-term use.

Next, in the case of the present invention, the metallization temperature is also low at about 500° C. or less, compared to the thousands and hundreds of degrees Celsius of the molybdenum manganese method, so that the influence of thermal stress on the ceramic due to the difference in thermal expansion between the ceramic and the metal is small.

Moreover, both Zn and Pb alloys are soft and can absorb the effects of thermal stress to some extent, making it possible to join relatively large ceramic plates and metal substrates, making it possible to create relatively large wear-resistant substrates. is easy to manufacture.

Therefore, even when attaching wear-resistant substrates to the hopper, the number of attached substrates can be reduced, and the amount of attachment work can be reduced.

Next, in order to use the wear-resistant substrate for hopper of the present invention, the wear-resistant substrate for hopper is lined up in the area of severe wear inside the hopper and fixed with the mounting bolt 4, or a mounting rod is used in place of the mounting bolt. It is attached by welding or by compressing the head of the mounting rod using hydraulic pressure, etc.

By laying this wear-resistant substrate for hopper on the inner wall of the hopper in this way, the inner wall surface of the hopper is protected by the abrasion-resistant ceramic 3, thereby greatly extending the service life of the hopper without causing wear or chipping. Can be done.

(F) [Other Examples] The wear-resistant substrate for a hopper of the present invention can be appropriately used as a wear-resistant member in the worn parts of equipment other than hoppers that are subject to severe wear.

As described above, the present invention is a metallized bonded substrate of ceramics and a metal substrate using ultrasonic vibration of a low-melting alloy such as a Zn alloy, so there is no need to use a high-temperature furnace, gas atmosphere furnace, vacuum furnace, etc. for manufacturing. The equipment is simple and inexpensive, and it is possible to manufacture from small to relatively large wear-resistant substrates.

Furthermore, since the metallization of the ceramic and the bonding to the metal substrate can be performed by one low-temperature heating, the manufacturing cost is low and economical.

Furthermore, since the metallization bonding of ceramics is performed at a relatively low temperature, residual stress in the ceramics is small, and there is no risk of peeling, cracking, or cracking of the ceramics during use.
It has many excellent features, such as no cracks and good durability over long periods of use.

[Brief explanation of the drawing]

FIGS. 1 and 2 are explanatory diagrams of metallized bonding of the wear-resistant substrate for a hopper of the present invention. 1 is a molten alloy for metallization, 2 is an ultrasonic vibrator, 3 is ceramics, 4 is a mounting bolt, 5 is a metal substrate, and 6 is a metallized surface.

Claims (1)

[Claims] 1. The metallized surface of a ceramic plate metallized by ultrasonic vibration excitation in a molten alloy with a low melting point such as a Zn alloy is placed on the worn surface of a metal substrate with a mounting portion on the back surface. A wear-resistant substrate for poppers characterized by being integrally bonded using a melting point alloy and having a ceramic composite on the wear surface.