316L不锈钢粉末的温压工艺研究.pdfVIP

维普资讯 学兔兔 第l3卷第l期 粉末冶金材料科学与工程 2008年2月 Vo1．13No．1 Materials Science and Engineering of Powder Metallurgy Feb．2oo8 316L不锈钢粉末的温压工艺研究 李春香，曹顺华，邹仕民，张秀芳 (中南大学 粉末冶金国家重点实验室，长沙 410083) 摘 要：研究316L不锈钢的温压行为，分析温压工艺参数对压坯密度的影响。结果表明：在粉末加热温度为9O℃、 模具温度12012、润滑剂含量O．8％(质量分数)的工艺条件下，压制压力为784 IVIPa时，压坯密度达6．92 g／cm ； 经1 13012烧结后密度为7．06 g／cm ，硬度为HRB76。还对温压与室温模压(添加O．7％硬脂酸锌)后的压坯密度和 弹性后效进行了比较：确证温压压坯密度比室温模压密度提高约0．2 g／cm ，弹性后效较室温模压的小。 关键词：温压；316L不锈钢；压坯密度；烧结 中图分类号：TF 124．37 文献标识码：A 文章编号：1673．0224(2008)1．35．05 Warm compaction technics of 3 1 6L stainless steel powder LI Chun·xiang，CAO Shun·hua,ZOU Shi-min，ZHANG Xiu·fang (State Key Laboratory ofPowder Metallurgy,Central South University,Changsha 410083，China) Abstract：Warm compaction behavior of 3 16L stainless steel was investigated,influences of processing parameters of warm compaction on green density of316L stainless steel were studied．Results show that,when compacting powder and die temperatures are 90℃and 120℃respectively,and lubricant content in powder is O．8％(mass percent)．the density of 316L stainless steelpowderof6．92 g／cm callbeachievedunderthe compactivepressureof784MPa；thedensityis 7，06 g／cm ．and the hardness is HRB76 after solid state sintering at 1 130℃．Moreover,warm compaction Was compared to traditional mould pressing(adding O．7％zinc stearate)via the green density and delayed elasticity,results show the green density ofwarm compaction is about 0．2 g／em higher and delayed elasticity is smaller． Key words：warm compaction；3 16L stainless ste