陈国清,康凯,付雪松,周文龙

• 1:大连理工大学材料科学与工程学院

摘要(Abstract)：

利用光学显微镜、扫描电子显微镜、电子探针,并通过室温拉伸实验和冲击实验,分析了不同热处理工艺对重型履带板用NiCrMo中碳低合金钢的组织和性能的影响。结果表明,1000℃保温8 h的均匀化退火能明显改善实验合金铸态组织中碳元素的枝晶偏析;随着碳含量的增加,合金抗拉强度成直线上升,韧性下降明显。当淬火温度高于910℃之后,晶粒尺寸长大明显,强度和硬度随之降低;淬火温度超过970℃后,个别晶粒出现异常长大现象;在450～550℃回火后得到回火索氏体组织,强度随着回火温度的上升而下降,0.32%碳含量的抗拉强度从1340 MPa下降到1220 MPa;韧性随之增加,冲击韧性从40 J.cm-2上升到65 J.cm-2。

关键词(KeyWords)： 低合金钢;热处理;力学性能;微观组织

Abstract:

Keywords:

基金项目(Foundation): 中央高校基本科研业务费专项资金(项目编号:DUT10ZDG02)资助;; 新世纪优秀人才支持计划资助(NCET-10-0278)

作者(Author): 陈国清,康凯,付雪松,周文龙

DOI: 10.13289/j.issn.1009-6264.2011.s1.037

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