摘要: |
通过对双相钢SAF2507进行埋弧焊试验,研究了不同焊接热输入对接头的组织转变、相比例、显微硬度和冲击性能的影响。结果表明:随着焊接热输入的增加,热影响区组织中铁素体向奥氏体转变更加充分,奥氏体含量不断增加且组织变得粗大,且随着析出相的出现导致显微硬度值增高及冲击值下降。推荐在埋弧焊焊接双相钢时优先采用焊接热输入为1.24kJ/mm的焊接工艺参数。 |
关键词: 双相钢;埋弧焊;焊接热输入;热影响区 |
基金项目: |
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Study on Properties of Duplex Stainless Steel Welding Joint Based on Submerged Arc Welding Steel |
Cui Weize Li Qing Guo Shuai Qin Yongqiang Guo Qing Jia Jiangpeng Cao Yilong
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Shanxi Aerospace Qinghua Equipment Co., Ltd., Changzhi 046012
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Abstract: |
Various welding heat inputs influence the properties of the stainless welding joint, including microstructure transition, phase proportion, microhardness and impact performance (toughness). The study on properties of duplex stainless steel SAF 2507 welding joint based on submerged arc welding were researched in this paper. The results indicated that with the increasing of welding heat input, the ferrite of HAZ transformed to austenite more sufficiently. The austenite increased and became more coarser, and the microhardness value increased while the impact toughness decreased with the appearance of precipitated phase. The welding heat input?of?1.24kJ/mm is preferred to the duplex stainless steel submerged arc welding. |
Key words: duplex stainless steel;SAW;welding heat input;HAZ |