30Cr13Cu4金属注射成形材料的热处理工艺研究

Research on Heat Treatment of 30Cr13Cu4 Materials Prepared by Metal Injection Molding Technique

摘要:

设计了一种金属注射成形30Cr13Cu4不锈钢材料，研究了热处理工艺参数（时效处理温度和保温时间）对材料组织及性能的影响。结果表明：含Cu金属粉末注射成形的合金组织均匀，相对密度为97.9%；随着时效温度的提高，基体上析出的碳化物数量增加并长大，而析出的球形纳米ε-Cu相转变成短棒状，材料的硬度先增加后降低；在520 ℃下进行时效处理时，随着保温时间的延长，合金的硬度不断提高，保温14 h后合金硬度为327 HV，析出弥散分布的ε-Cu析出相对合金硬度提高作用明显。

Abstract:

In this paper， a kind of metal injection molding （MIM） 30Cr13Cu4 stainless steel alloy was designed. The effects of heat treatment parameters， including aging temperature and holding time， on the microstructure and properties of the material were studied. The results show that the alloy containing Cu has a uniform microstructure with a relative density of 97.9%. As the aging temperature increased， the amount of carbides precipitated on the matrix increased and grew， while the spherical nano ε-Cu phase precipitated transforming into short rods， and the hardness of the material firstly increased and then decreased. When aging at 520 ℃， the hardness of the alloy increased with the extension of the holding time， and the hardness of the alloy was 327 HV after holding for 14 h， and the relative hardness increase of the precipitated dispersive distributed ε-Cu phase was obvious.