Effect of TiH2 on structure and properties of Cu60Zn40 alloy metal bond
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摘要: 以Cu60Zn40合金粉末为原料,加入TiH2,研究TiH2的体积分数与烧结温度对Cu60Zn40结合剂力学性能与微观结构的影响。结果表明:TiH2起到活化烧结作用,可以提高Cu60Zn40的力学性能。当烧结温度为680 ℃,TiH2的体积分数从0增大到10%时,抗弯曲强度从225 MPa提高到445 MPa,抗冲击强度从28.3 kJ/m2提高到54.3 kJ/m2。当烧结温度为560 ℃,TiH2体积分数从0增大到5%时,硬度由46 HRB提高到88 HRB。气孔率随着TiH2体积分数的增大而增大,当TiH2体积分数为20%时,气孔率为6.2%。TiH2的加入可以提高Cu60Zn40结合剂金刚石磨具磨削性能。当TiH2体积分数从0增大到10%时,磨耗比由28.50提高到61.67,同时减少工件表面烧伤。
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关键词:
- 氢化钛 /
- 金属结合剂 /
- Cu60Zn40合金 /
- 微观结构
Abstract: The effects of TiH2 volume concentration and sintering temperature on the mechanical properties and microstructure of Cu60Zn40 binder were studied with Cu60Zn40 alloy powder as raw material and TiH2 as additive. TiH2 can activate sintering and the mechanical properties of Cu60Zn40 were improved. When the sintering temperature is 680 ℃ and the volume concentration of TiH2 increases from 0 to 10%, the flexural strength increases from 225 MPa to 445 MPa while the impact strength increases from 28.3 kJ/m2 to 54.3 kJ/m2. When the sintering temperature is 560 ℃ and the volume concentration of TiH2 increases from 0 to 5%, the hardness increases from 46 HRB to 88 HRB. The porosity increases with the increase of TiH2 volume concentration. When the volume concentration of TiH2 is 20%, the porosity is 6.2%. The addition of TiH2 is beneficial to the grinding performance of Cu60Zn40 bonded diamond grinding tool. The wear ratio increases from 28.50 to 61.67 and that the surface burn of workpiece is reduced when volume concentration of TiH2 increases from 0 to 10%.-
Key words:
- titanium hydride /
- metal bond /
- Cu60Zn40 alloy /
- microstructure
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