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Electrical discharge machining hard alloy plate of non-even structure and manufacturing method thereof

A cemented carbide, electrical discharge machining technology, applied in the field of electrical discharge machining mold materials, can solve the problems of poor polishing performance, poor corrosion resistance, easy to collapse, etc. collapse effect

Pending Publication Date: 2018-06-26
株洲科锐硬质合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So as to effectively solve many defects such as material easy to collapse, poor corrosion resistance, poor polishing performance, etc., and improve the service life of the mold

Method used

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  • Electrical discharge machining hard alloy plate of non-even structure and manufacturing method thereof
  • Electrical discharge machining hard alloy plate of non-even structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 0.6μm WC powder 70.6%,

[0020] 26μm WC powder 18%,

[0021] Cr 3 C 2 Powder 0.4%,

[0022] Co powder 6.0%,

[0023] Ni powder 5.0%.

Embodiment 2

[0025] 0.6μm WC powder 59.5%,

[0026] 26μm WC powder 22%,

[0027] Cr 3 C 2 Powder 0.5%,

[0028] Co powder 13.0%,

[0029] Ni powder 5.0%

Embodiment 3

[0031] 0.6μm WC powder 59.5%,

[0032] 26μm WC powder 25%,

[0033] Cr 3 C 2 Powder 0.5%,

[0034] Co powder 8.0%,

[0035] Ni powder 7.0%

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PUM

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Abstract

The invention relates to an electrical discharge machining (EDM) hard alloy plate of a non-even structure and a preparation method thereof. The hard alloy plate mainly comprises two WC composite hardphases, Co / Ni as bonding metal, and Cr as an anti-corrosion microelement. The hard alloy plate is prepared from 55% to 80% of submicron WC powder, 10% to 30% of super-rough WC powder, 0.3% to 1.2% ofCr3C2, 5.0% to 15% of Co powder and 2.0% to 8.0% of Ni powder. The manufacturing method comprises the steps that the powder is subjected to ball milling and spray drying in proportion, a mixture is obtained, then automatic pressing pre-forming and isostatic cool pressing forming are carried out, and then pressure sintering and distressing treatment is carried out. The sintering temperature rangesfrom 1,420 DEG C to 1,480 DEG C, heat preservation is carried out for 50 min, and pressure maintaining is carried out for 45 min. The electrical discharge machining (EDM) hard alloy plate of the non-even structure can be obtained.

Description

technical field [0001] The invention relates to a formula and a manufacturing process of a non-uniform electric discharge machining (EDM) hard alloy sheet material, and belongs to the technical field of electric discharge machining mold materials. Background technique [0002] At present, the materials of electric discharge machining cemented carbide molds mainly rely on imports. The mold materials produced by traditional domestic techniques are prone to collapse, poor corrosion resistance, poor polishing performance and many other defects, which cause the sheet to be easily damaged during the EDM process. Corrosion and cracks appear. Thus affecting the difficulty of making the mold and the service life. Contents of the invention [0003] In view of the above-mentioned shortcomings, the inventors of the present invention conducted intensive research, and unexpectedly found that by adjusting the grain matching of WC and controlling the ratio of submicron-sized WC to ultra-...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05
CPCC22C1/051C22C29/005C22C29/067C22C29/08
Inventor 尹新龙
Owner 株洲科锐硬质合金股份有限公司