激光选区熔化成形注塑模具钢AISI 420与S136的组织及力学性能研究

激光选区熔化成形注塑模具钢AISI 420与S136的组织及力学性能研究

论文摘要

采用激光选区熔化(SLM)技术分别成形注塑模具钢AISI 420和S136,对两种钢的相组成、微观组织、显微硬度、抗拉强度和摩擦磨损性进行了研究。结果表明:SLM成形AISI 420比S136具有更高的强度和伸长率,其强度和伸长率分别为:1234.13 MPa、14.63%,642.89 MPa、9.76%;得益于S136较高的C含量,在激光加工的快速冷却作用下S136比AISI 420更易产生马氏体,因此拥有更高的硬度和较低的磨损率,S136和AISI 420的硬度和磨损率分别为589 HV3、3.2803×10-5mm3·N-1·m-1,493.78 HV3、4.1239×10-5mm3·N-1·m-1。

论文目录

  • 1 试验材料及方法
  •   1.1 试验材料
  •   1.2 成形过程
  •   1.3 试样的表征与分析
  • 2 试验结果与讨论
  •   2.1 物相分析
  •   2.2 显微组织分析
  •   2.3 拉伸性能
  •   2.4 硬度与耐磨性
  • 3 结论
  • 文章来源

    类型: 期刊论文

    作者: 文世峰,吴雪良,周燕,魏青松

    关键词: 激光选区熔化,注塑模具钢,组织与性能

    来源: 热加工工艺 2019年04期

    年度: 2019

    分类: 工程科技Ⅰ辑

    专业: 金属学及金属工艺

    单位: 华中科技大学材料成形与模具技术国家重点试验室,武汉工程大学机电工程学院

    基金: 国家自然科学基金项目(51605176,51375189),国家高技术研究发展计划项目(863计划)(2015AA042501),湖北省科技支撑计划项目(2014BAA017),武汉市关键技术攻关计划(2015010202010088)

    分类号: TG142.1;TG665

    DOI: 10.14158/j.cnki.1001-3814.2019.04.006

    页码: 26-30+35

    总页数: 6

    文件大小: 3610K

    下载量: 187

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