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Fe-Cu-Ni-Mo-C材料烧结硬化性能研究 被引量:4

STUDY ON THE SINTER-HARDENING PROPERTIES OF Fe-Cu-Ni-Mo-C MATERIALS BY WARM COMPACTION WITH WALL LUBRICATED DIE
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摘要 本文研究了模壁润滑温压部分扩散预合金Fe-2Cu-2Ni-1Mo-1C材料的烧结硬化性能,讨论了冷却速度对材料力学性能和显微组织的影响。部分扩散预合金Fe-2Cu-2Ni-1Mo-1C粉末采用模壁润滑温压压制,1 150℃氢气氛保护下烧结60 min,在900℃~600℃温度冷却区间以4.6℃/s,2.9℃/s,1.5℃/s三种速度快速冷却。试验结果显示:材料的抗拉强度和表观硬度随冷却速度的增大而升高,延伸率却随冷却速度增大而降低。在4.6℃/s的冷却速度下,Fe-2Cu-2Ni-1Mo-1C材料的抗拉强度为872 MPa,表观硬度为257 HB,明显高于2.9℃/s和1.5℃/s冷却条件下的性能。烧结硬化后材料尺寸有轻微收缩,但呈现出良好的尺寸稳定性。材料的烧结密度稍有降低。烧结硬化材料的显微组织为马氏体、贝氏体、珠光体和富镍残余奥氏体共存。马氏体含量随冷却速度增大而增加,低速冷却下组织主要为珠光体、残余奥氏体。 Sinter-hardening properties of compacts formed by partiall-diffusion alloyed Fe-2Cu-2Ni-1Mo-1C powders were investigated.Samples were formed by warm compaction with wall lubricated die,then sintered in hydrogen atmosphere at 1 150℃ for an hour and cooled at three different rates,4.6℃/s,2.9℃/s,1.5℃/s,respectively,from 900℃ to 600℃.Effect of cooling rate on mechanical properties and microstructure of the materials is discussed.Results show that when cooling rate increases,mechanical properties of the material...
出处 《粉末冶金工业》 CAS 北大核心 2007年第6期9-13,共5页 Powder Metallurgy Industry
基金 国家和广东省自然科学基金项目(50574041 06105411) 广东省及广州市科技项目(2004B10301018 20021-D6081) 教育部新世纪优秀人才项目(NCET-05-0739)
关键词 模壁润滑温压 烧结硬化 力学性能 显微组织 warm compaction with wall lubricated die sinter-hardening mechanical property microstructure
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