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High-hardness high-strength low-cost nonmagnetic hard alloy

A hard alloy, high-strength technology, applied in the field of material science, can solve the problems of difficult demoulding, low pressed finished products, serious sticky materials, etc., and achieve the effect of low cost, small friction coefficient and good wear resistance

Active Publication Date: 2009-05-27
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a non-magnetic hard alloy with high hardness, high strength and low cost, aiming at the defects that the existing magnetic hard alloy has serious sticky material, difficult demoulding, and low pressed finished product when producing magnetic tile moulds;

Method used

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  • High-hardness high-strength low-cost nonmagnetic hard alloy
  • High-hardness high-strength low-cost nonmagnetic hard alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix the ingredients according to the ingredients of Example 1 in Table 1, then add it into the ball mill, and add technical alcohol and non-magnetic alloy steel balls in the ball mill to grind for 24 to 30 hours; filter and mix the above-mentioned mixture after ball milling Precipitate for 2 to 3 hours;

[0023] Dry the precipitated mixture at a temperature of 100-120°C for 4-6 hours; the dried mixture should be sieved with a 40-60 mesh screen; add 8%-11% by weight The SBS forming agent is molded, and then dried again after molding. The drying time is 10-15 minutes. After drying, it is sieved again with a 40-60 mesh screen, and the above-mentioned mixture is calculated according to the product specification size and the corresponding specific gravity calculation formula. Finally, the blank is made, and the blank is put into a vacuum sintering furnace for sintering. The vacuum degree is controlled at 3Pa to 300Pa, and the sintering temperature is 1420°C to 1460°C.

[00...

Embodiment 2

[0026] Carry out batching mixing according to the composition of embodiment 2 in table 1, other technological processes are the same as embodiment 1, will not repeat them.

Embodiment 3

[0028] Carry out batching mixing according to the composition of embodiment 3 in table 1, other technological processes are the same as embodiment 1, will not repeat them.

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Abstract

The invention relates to a high-rigidity, high-strength and low-cost non-magnetic cemented carbide. The compositions of the non-magnetic cemented carbide by weight proportion are: tungsten carbide of 80 to 90, nickel of 5 to 20, chromium carbide of 0.5 to 5, vanadium carbide of 0.1 to 0.5, and molybdenum carbide of 0.1 to 0.5. The high-rigidity, high-strength and low-cost non-magnetic cemented carbide of the invention has high rigidity, good abrasion resistance and small friction coefficient, can adopt the tungsten carbide sold in market, can not cause the crystal particles of the tungsten carbide to grow, adopts the compound compositions without need to adopt the metal element form, has low cost and wide application range, and meets the requirement of large-scale market.

Description

technical field [0001] The invention relates to a hard alloy material, in particular to a non-magnetic hard alloy with high hardness, high strength and low cost, belonging to the technical field of material science. Background technique [0002] Hard alloys can be divided into magnetic hard alloys and non-magnetic hard alloys, such as Chinese patent application (01128546. Tungsten carbide is used as hard phase, iron, cobalt and nickel are used as binder phase, carbide or boride or nitride of titanium or vanadium is added, tantalum carbide or niobium carbide is added, and carbon is added, after wet grinding, pressing, It is made by vacuum sintering. The hard alloy is a magnetic hard alloy. When the magnetic hard alloy is used to produce the magnetic tile mold, the sticky material is serious, it is not easy to demould, and the finished product is low; therefore, the scope of use is narrow. [0003] The non-magnetic hard alloy is mainly used for molds in the production of magn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/08
Inventor 欧阳福
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD