WC series steel bond hard alloy

A technology of steel-bonded hard alloy and hard phase, which is applied in the field of powder metallurgy, can solve the problems of being unable to meet the requirements for the use of brazing chips and snow-shoveling chips, and low material hardness, and achieve good wear resistance, high hardness, and low porosity Effect

Active Publication Date: 2015-03-04
ZHUZHOU HARD ALLOY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The alloy belongs to the high manganese steel-based steel-bonded hard alloy, which has high hardness. The hardness of the sintered state reaches HRA81.5~82.5, and the hardness after work hardening is HRA84~86. There is a big gap in cemented carbide, which cannot meet the requirements of brazing chips and snow shovels.

Method used

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  • WC series steel bond hard alloy
  • WC series steel bond hard alloy

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Experimental program
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Effect test

Embodiment 1

[0019] Embodiment 1: the weight percentage (ie wt%, the following examples are all the same) is 65% of WC, 1.6% of Cr 3 C 2 Powder, 1.5% Ni, 0.8% Mo, 6.5% ferromanganese powder, 0.7% carbon black and the rest of iron and other powders are mixed according to requirements, with cemented carbide rods as grinding bodies, and the ball-to-material ratio is 4:1, using alcohol as the medium for wet grinding for 28 hours, unloading, spray drying, granulation, pressing and molding, and finally integral sintering, using zirconia boat as the contact material, sintering at 1300°C for 1 hour and then cooling with the furnace , to obtain steel-bonded cemented carbide products with high hardness and high dimensional accuracy. The specific alloy properties are shown in Table 1.

Embodiment 2

[0020] Embodiment 2: be 70% WC by weight percentage, 1.4% Cr 3 C 2 Powder, 1.3% Ni, 0.7% Mo, 5.5% ferromanganese powder, 0.6% carbon black and the rest of iron and other powders are mixed according to requirements, with cemented carbide rods as grinding bodies, and the ball-to-material ratio is 4:1, using alcohol as the medium for wet grinding for 28 hours, then unloading, spray drying, granulation, pressing and molding, and finally integral sintering, using zirconia boat as the contact material, sintering at 1320°C for 1 hour and then cooling with the furnace , to obtain WC steel-bonded carbide products with high hardness and high dimensional accuracy. The specific alloy properties are shown in Table 1.

Embodiment 3

[0021] Embodiment 3: be 75% WC by weight percentage, 1.2% Cr 3 C 2 Powder, 0.9% Ni, 0.6% Mo, 4.6% ferromanganese powder, 0.5% carbon black and the rest of iron and other powders are mixed according to requirements, with cemented carbide rods as grinding bodies, and the ball-to-material ratio is 4 : 1. Unload after 28 hours of wet grinding with alcohol as the medium, spray dry and granulate, press into shape, and finally carry out integral sintering, use zirconia boat as the contact material, sinter at 1360 ° C for 1 hour and then cool with the furnace. Steel-bonded cemented carbide products with high hardness and high dimensional accuracy are obtained. The specific alloy properties are shown in Table 1.

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Abstract

The invention relates to a WC series steel bond hard alloy. The mass percentage of hard phase WC is 65-85wt%, and the mass percentage of binding phase high manganese steel. The alloy comprises the following components in mass percent: 61-80wt% of W, 2.2-5.1wt% of Mn, 0.6-1.5wt% of Ni, 0.5-1.5wt% of Cr, 0.4-1.0wt% of Mo, 4.0-6.0wt% of C and the balance of Fe. The purposes of purifying grain boundary and strengthening the binding phase, improving the bonding strength effect of the two phases and thus improving the strength and hardness of the alloy are reached by adding alloy elements such as Cr and Mo, the promotion of alloy performance is realized, low product porosity and good surface quality are obtained, and the alloy is high in strength and hardness and has excellent abrasion resistance.

Description

[0001] technical field [0002] The invention belongs to the field of powder metallurgy, and in particular relates to a WC series steel-bonded hard alloy. Background technique [0003] As a new type of engineering material, steel-bonded cemented carbide (referred to as steel-bonded alloy) has both the hardness and wear resistance of carbide and the good mechanical properties of steel. It is a tool material between cemented carbide and tool steel. The performance characteristics of the steel-bonded alloy are that on the basis of maintaining high hardness and wear resistance, the strength and toughness are greatly improved, and the comprehensive performance is good, which is suitable for use under the condition of relatively large impact load. Since steel-bonded alloy contains a large amount of dispersed high-hardness hard phase, its wear resistance can be close to that of high-cobalt cemented carbide, but compared with cemented carbide, it has better toughness, lower cost, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05
CPCC22C1/051C22C29/08
Inventor 武文花舒艳兵吴昊
Owner ZHUZHOU HARD ALLOY GRP CO LTD
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