石墨化处理后中碳钢的显微组织与性能
Microstructure and Properties of Medium-carbon Steel with Graphite
摘 要
采用增加石墨核心的方法,制备了具有石墨和铁素体两相组织的中碳钢;用光学显微镜、扫描电镜、透射电镜对其组织进行了观察;用万能材料试验机对其力学性能进行了测试,同时在机床上对其切削加工性进行了切削试验.结果表明:石墨化中碳钢中的石墨是以与石墨具有相同简单六方结构BN为核心析出、长大的,石墨粒子不仅在晶界上析出,而且也在晶内析出;其分布较均匀,平均尺寸小于10 μm,大小均匀;屈强比低(0.59~0.63),相对切削性高(Kν=5.424 1 ),表现出较好的切削性,能够满足高速切削加工的要求.
石墨
显微组织
力学性能
切削性能
medium-carbon steel
graphite
microstructure
mechanical property
machinability
Abstract
A kind of medium-carbon steel with microstructure consisting of graphite and ferrite was prepared by method of increasing graphite nucleus.Microstructure of the steel was observed using OM,SEM and TEM,mechanical properties were tested using universal material testing machine,and machinability was tested using lathe.The results show that the precipitation and growth of the graphites were carried out based on the heterogeneous nuclei BN.The graphites homogeneously distributed in grains and at grain boundaries.Size of the graphite was less than 10 μm.The yield ratio of the steel was low(0.59-0.63) and the relative machinability was high (Kν=5.424 1).The tested steel display higher machinability and thus can satisfy the requirement of high speed machining.
中图分类号 TG142.1
所属栏目 材料性能及其应用
基金项目 北京市优秀人才培养专项经营资助项目(20041d0101109)
收稿日期 2007/9/13
修改稿日期 2008/1/11
网络出版日期
作者单位点击查看
备注张永军(1969-),男,山东日照人,高级工程师,博士.
引用该论文: ZHANG Yong-jun,HAN Jing-tao,WANG Quan-li,ZHU Chen,JIN Yong-chun. Microstructure and Properties of Medium-carbon Steel with Graphite[J]. Materials for mechancial engineering, 2008, 32(10): 48～51
张永军,韩静涛,王全礼,朱辰,金永春. 石墨化处理后中碳钢的显微组织与性能[J]. 机械工程材料, 2008, 32(10): 48～51
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【8】张新宝.通过使钢中的碳石墨化开发兼备高疲劳强度和优良切削性能的新的无铅易切削钢[J].五钢科技,2003(3):51-55.
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