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| 双金属带锯条异种接头的CO2激光焊接实验研究 | |
| 引用本文： | 祁俊峰,牛振,张冬云,陈虹,左铁钏.双金属带锯条异种接头的CO2激光焊接实验研究[J].中国激光,2007,34(s1):314-318. |
| 作者姓名： | 祁俊峰 牛振 张冬云 陈虹 左铁钏 |
| 作者单位： | 祁俊峰:北京工业大学激光工程研究院, 北京 100022 牛振:北京工业大学激光工程研究院, 北京 100022 张冬云:北京工业大学激光工程研究院, 北京 100022 陈虹:北京工业大学激光工程研究院, 北京 100022 左铁钏:北京工业大学激光工程研究院, 北京 100022 |
| 摘 要： | 利用CO2激光对50CrNiMoVA超高强度合金带钢和W2Mo9Cr4VCo8高速钢扁丝构成的双金属带锯条进行了对接焊。分析讨论了激光束与对接缝的相对偏移量对焊缝成形的影响，通过金相实验、显微硬度实验和弯曲实验，对焊接接头的显微组织、显微硬度及韧性进行了分析，并讨论了焊后热处理对焊接接头组织、硬度及抗弯性能的影响。在不加过渡层情况下，得到成形平滑、无明显外观缺陷的异种金属焊缝，焊后经过1190 ℃分级淬火和560 ℃,2 h的3次回火热处理工艺，使得双金属带锯条的CO2激光焊缝经90°折弯而不发生开裂，其性能达到工业应用水平。 |
| 关 键 词： | 激光技术 CO2激光 焊接 双金属带锯条 异种接头 |
Experimental Study of the Bimetal Saw CO2Laser Dissimilar Welding |
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| Abstract: | CO2 laser beam butt welding the bimetal saw made of 50CrNiMoVA high-strength alloy steel and W2Mo9Cr4VCo8 high-speed steel has been completed. The influence of side-play amount between laser beam and weld on weld shaping has been discussed. Weld microstructure, micro-hardness and toughness are analyzed through metallurgical test, micro-hardness test and bending test, meanwhile the influence of heat treatment on weld microstructure, hardness and bending property are discussed. The welds without transition layer which are smooth and no external defects, can be obtained. After 1190 ℃ marquenching and three times 560 ℃ tempering for 2 hours, the bimetal saw has no crack in 90° bending test and its property has achieved to industry level. |
| Keywords: | laser technique CO2 laser welding bimetal saw dissimilar weld |