| 本文已被：浏览 192次 下载 214次 |
码上扫一扫！ |
|
|
| 1Cr22Mn16N高氮钢激光焊接II.焊缝组织与性能 |
|
赵琳1,2, 田志凌1, 彭云1,2, 赵晓兵1,2, 齐彦昌1,2
|
|
1.钢铁研究总院先进钢铁流程及材料国家重点实验室, 北京 100081;2.钢铁研究总院结构材料研究所, 北京 100081
|
|
| 摘要: |
| 为了研究高氮钢激光焊接接头焊缝区组织、性能特性,利用CO2激光对1Cr22Mn16N高氮钢进行了焊接,研究了焊接热输入和保护气体组成对焊缝组织、性能的影响。结果表明,高氮钢激光焊接焊缝组织均为奥氏体和少量的δ铁素体。当焊接热输入增大时,δ铁素体的尺寸显著增大。高氮钢激光焊接接头均没有出现软化区。随着热输入的减小,焊缝区的平均硬度升高;随着保护气体中氮气比例增大,焊缝区的硬度增加。当热输入减小时,焊缝韧性上升,而保护气体的组成对焊缝冲击吸收功的影响不大。 |
| 关键词: 高氮钢 激光焊接 焊缝 组织 性能 |
| DOI： |
| 分类号: |
| 基金项目:国家重点基础研究规划(973)项目课题(2004CB619103);中国博士后科学基金资助(20060390417) |
|
| Laser welding of high nitrogen steel 1Cr22Mn16N-Ⅱ.microstructure and mechanical properties of weld metal |
|
ZHAO Lin1,2, TIAN Zhiling1, PENG Yun1,2, ZHAO Xiaobing1,2, QI Yanchang1,2
|
|
1.State Key Laboratory of Advanced Steel Processes and Products, Central Iron & Steel Research Institute, Beijing 100081, China;2.Division of Structural Materials, Central Iron & Steel Research Institute, Beijing 100081, China
|
| Abstract: |
| In order to study the microstructure and mechanical properties of the weld metal of high nitrogen steel 1Cr22Mn16N, the steel was welded by CO2 laser welding, and the influence of the shielding gas composition and heat input on the microstructure and mechanical properties of the weld metal was investigated. The experimental results indicate that the microstructure in the weld metal is austenite and δ-ferrite.The size of δ-ferrite is increased with the increase of heat input.The results also show that no soft zone occurs in the weld metal.The hardness of weld metal is increased as the heat input is decreased, and it is improved as N2 in the shielding gas is increased.The toughness increases when the heat input decreases, whereas the compositions of shielding gas probably have no influence on the change of toughness of the weld metal. |
| Key words: high nitrogen steel laser welding weld metal microstructure mechanical properties |
