首页 | 本学科首页   官方微博 | 高级检索  
     

SS400钢焊接接头表层组织纳米均一化及硬度均一化处理
引用本文:李东,陈怀宁,刘刚,卢柯.SS400钢焊接接头表层组织纳米均一化及硬度均一化处理[J].金属学报,2001,37(9):980-984.
作者姓名:李东  陈怀宁  刘刚  卢柯
作者单位:1. 中国科学院金属研究所,沈阳,110016
2. 中国科学院金属研究所快速凝固非平衡合金国家重点实验室,沈阳,110016
基金项目:国家自然科学基金50071061,国家 973计划 1998061511资助项目
摘    要:采用高能喷丸技术以SS400钢焊接接头的表面层进行处理。利用XRD,TEM,SEM对处理后的表面层进行结构表征,同时测量了高能喷丸引起的硬度变化。结果表明,高能喷丸处理可使焊接接头的表面层形成尺寸均匀、取向随机分布的纳米晶;焊接接头三个区域的纳米层硬度一致,且远高于高能喷丸处理前样品的硬度,实现了SS400钢焊接接头区表层组织纳米均一化和硬度均一化。表面纳米化对材料表面的强化有着重要的贡献。

关 键 词:焊接接头  高能喷丸  表面纳米化  组织  显微硬度  SS400钢
文章编号:0412-1961(2001)09-0980-05
修稿时间:2001年3月8日

HOMOGENIZATION OF MICROSTRUCTURE AND HARDNESS OF SURFACE LAYER OF SS40O STEEL WELDED JOINT
LI Dong,M Huaining,LIU Gang,LU Ke Institute of Metal Research,The Chinese Academy of Sciences,Shenyang State Key Laboratory for RSA.HOMOGENIZATION OF MICROSTRUCTURE AND HARDNESS OF SURFACE LAYER OF SS40O STEEL WELDED JOINT[J].Acta Metallurgica Sinica,2001,37(9):980-984.
Authors:LI Dong  M Huaining  LIU Gang  LU Ke Institute of Metal Research  The Chinese Academy of Sciences  Shenyang State Key Laboratory for RSA
Abstract:The surface layer of the welded joint of SS400 steel was treated by high-energy shot peening (HESP) technique, and characterized by means of the XRD, TEM and SEM. The hardness variation along the depth of the treated sample was examined after treatment. Experimental results show that the coarse-grained microstructure of top-surface layer of welded joint can be refined into hano-scale after the HESP treatment, and these nanocrystalline grains are about 10 nm in diameter and possess nearly random crystallographic orientations. The same hardness can be found for the nanostructured surface layers of the base metal, HAZ and weld of SS400 steel respectively, which is much higher than that of the sample before the HESP treatment. Homogenization of microstructure and hardness of the surface layer of SS400 steel welded joint are achieved. The strengthening of the surface layer can be primarily attributed to the surface nanocrystallization.
Keywords:welded joint  high-energy shot peening  surface nanocrystallization  microstruc- ture  microhardness  
本文献已被 CNKI 维普 万方数据 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号