杨福宝,景艳红,李丹,章林,李大全,朱强

• 1:北京有色金属研究总院复合材料研究中心
• 2:北京科技大学材料科学与工程学院

摘要(Abstract)：

比较了热等静压前后MIM418合金组织与致密度的变化,研究了不同淬火(水冷和空冷)、时效工艺对热等静压后固溶态MIM418合金微观组织及各种析出相的影响,利用扫描电镜、透射电镜、能谱分析等手段分析了合金中主要强化相γ'和碳化物二者的形态、大小和分布的规律。结果表明,热等静压可明显提高MIM418合金的致密度,但对显微组织影响不大,"固溶+中温时效"可以获得较好的硬化效果,主要析出强化相γ'和二次碳化物的析出受固溶冷却方式的影响较大,γ'相纳米化和二次碳化物的析出或将有益于MIM418硬度的大幅度提高。

关键词(KeyWords)： 粉末注射成形;热等静压;MIM418;热处理;显微组织

Abstract:

Keywords:

基金项目(Foundation): 国家科技部高技术研究发展计划项目(2012AA03A514)

作者(Author): 杨福宝,景艳红,李丹,章林,李大全,朱强

DOI: 10.13289/j.issn.1009-6264.2015.s1.025

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