30Cr3钢壳体淬火状态下真空电子束焊接工艺X.pdf

文档介绍：1
1 1
2 2 1
Ξ
2 2 2
1
2 2 1 1
2 1 1 1 1 1
1 1 1 1
1 1 1 1
2
2 2
2
1 1
2003 年 10 月推进技术 Oct 2003
第 24 卷第 5 期 JOURNAL OF PROPULSION TECHNOLOGY Vol 24 No 5
30Cr3 钢壳体淬火状态下真空电子束焊接工艺
潘丽华, 孙卫东, 陈
2 2 2 2
(上海新力动力设备研究所, 上海 200125)
摘要: 为解决淬火状态下 30Cr3 超高强度钢在真空电子束焊接时易产生冷裂纹、过热区脆化及热影响区软化
等问题, 在对材料性能分析的基础上, 采取了提高真空度、提高加速电压、焊前预热、选择合适的焊接速度以及焊
后回火处理等措施。结果表明, 金相分析未发现缺陷, 试样断口为塑性断裂, 试片焊缝强度系数达 0 96 , 产品爆
破压力 pb > 27MPa。证明该方法可满足设计要求的焊接接头, 为固体火箭发动机壳体的生产提供了新的工艺方法。
关键词: 淬火硬化; 电子束焊; 真空焊; 预热; 回火
中图分类号: V462 文献标识码: A 文章编号: 1001 4055 (2003) 05 0478 03
Ξ
1
Electron beam welding of quenched 30Cr3 ultrahigh strength steel case
PAN Li hua , SUN Wei dong , CHEN Min
(Shanghai Xinli Power Equipment Inst. , Shanghai 200125 , China)
Abstract : The tendency of cold crack , overheating area embrittlement and HAZ softening of 30Cr3 ultrahigh strength steel in
quenching state after vacuum electron beam welding were introduced. A series of measures such as raising vacuum level , increasing
acceleration voltage , preheating before welding , choosing suitable welding speed and tempering after welding were presented based on
the material property analysis. The results showed that no defect was found through metallographic analysis of weld joint. It also
showed that the sample fractured plastically , weld strength factor of the sample reached as high as 0 96