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赵琳, 田志凌, 彭云, 许良红, 李冉. 1Cr22Mn16N高氮钢的激光焊接Ⅲ.焊接热影响区组织和性能[J]. 焊接学报, 2007, (12): 26-30.
引用本文: 赵琳, 田志凌, 彭云, 许良红, 李冉. 1Cr22Mn16N高氮钢的激光焊接Ⅲ.焊接热影响区组织和性能[J]. 焊接学报, 2007, (12): 26-30.
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ZHAO Lin, TIAN Zhiling, PENG Yun, XU Lianghong, LI Ran. Laser welding of high nitrogen steel 1Cr22Mn16N Ⅲ.Microstructure and mechanical properties of welding heat-affected zone[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (12): 26-30.
Citation: ZHAO Lin, TIAN Zhiling, PENG Yun, XU Lianghong, LI Ran. Laser welding of high nitrogen steel 1Cr22Mn16N Ⅲ.Microstructure and mechanical properties of welding heat-affected zone[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2007, (12): 26-30.
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1Cr22Mn16N高氮钢的激光焊接Ⅲ.焊接热影响区组织和性能

Laser welding of high nitrogen steel 1Cr22Mn16N Ⅲ.Microstructure and mechanical properties of welding heat-affected zone

    摘要
  • 摘要: 利用热模拟技术,对高氮钢激光焊接热影响区(HAZ)的组织和性能进行了研究。结果表明,高氮钢焊接热影响区组织为奥氏体和δ-铁素体。随着焊接冷却速度的增大,高氮钢粗晶区的显微硬度增大;随着焊接峰值温度降低,热影响区显微硬度逐渐减小。焊接热影响区显微硬度均高于母材,没有出现软化区。随着冷却速度的增大,热影响区粗晶区的冲击吸收功先上升然后降低,而整个热影响区出现了两处脆化区。

     

    Abstract: The microstructure and mechanical properties of heat-affected zone (HAZ)of high nitrogen steel (HNS)were investigated by using thermo-simulation technique.The experimental results indicate that the microstructure in the HAZ of HNS is austenite and δ-ferrite under laser welding conditions.The hardness of the coarsegrained heat-affected zone (CGHAZ) increases when the cooling rate increases, and the one of the HAZ decreases while the peak temperature decreases.The results show that the hardness of the HAZ is higher than the one of the base metal, indicating no softening of the HAZ under appropriate welding conditions.The impact toughness of CGHAZ is improved with the increase of the cooling rate, whereas two brickle zones exist in the HAZ.

     

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