改善焊接接头疲劳强度超声冲击法的试验研究

摘要/Abstract

摘要： 利用自行研制的超声波冲击试验装置，对几种典型焊接结构用钢（Q235B和16Mn）的对接和十字接头（熔透）实施冲击处理。然后进行焊态与冲击处理态的弯曲与拉伸两种加载方式的疲劳对比试验。分别获得了各种情况冲击处理前后的σ－N曲线及条件疲劳极限（2×10{sup}6周次）。结果表明：超声冲击处理后，Q235B对接接头条件疲劳极限（2×10{sup}6周次）提高了57%（拉伸），十字接头（4点弯曲）提高了64%，能够提高疲劳寿命40～60倍左右。16Mn对接接头条件疲劳极限（2×10{sup}6周次）提高了90%（拉伸），十字接头（拉伸）提高了67%，能够提高疲劳寿命多达30～100倍。超声冲击处理对16Mn疲劳强度与寿命的改善程度高于Q235B。

关键词: 超声冲击, 对接接头, 焊接接头, 焊趾, 疲劳强度, 十字接头

Abstract: It is studied to improve the fatigue strength of bull and cruciform welded joins of steel Q235B and 16Mn by peening the welded toes with ultrasonic equipment. The σ-N curves and fatigue limits (2×10{sup}6) of steel Q235B and 16Mn of both joints are obtained for both as welded and peened conditions. The results show that the fatigue strength of butt and cruciform joints of steel Q235B have been increased by 57% (tension) and 64% (4-points bending test), the fatigue life of the peened joints is 40~60 times as long as the as – welded joints. The fatigue strength of butt and cruciform joints of steel 16Mn are increased by 90% (tension) and 67% (tension), the fatigue life of the peened joints is 30~100 times as long as the as – welded joints, respectively. The quantity of improving the fatigue strength and life of 16Mn steel welded joint is higher than that of Q235Bander ultrasonic peening condition.

Key words: Butt joint, Cruciform joint, Fatigue strength, Ultrasonic peening, Weld toe, Welded joints

中图分类号:

TG404

霍立兴;王东坡;张玉凤;荆洪阳;杨新岐. 改善焊接接头疲劳强度超声冲击法的试验研究[J]. , 2000, 36(4): 78-82.

Huo Lixing;Wang Dongpo;Zhang Yufeng;Jing Hongyang;Yang Xinqi. THE INVESTIGATION OF EXPERIMENTS TO IMPROVING THE FATIGUE STRENGTH OF WELDED JOINTS BY ULTRASONIC PEENING METHOD[J]. , 2000, 36(4): 78-82.

[1]	程礼, 陈礼顺, 李思路, 刘景元. 航空发动机叶片掉角故障疲劳机理试验方法研究[J]. 机械工程学报, 2019, 55(13): 72-79.
[2]	洪鼎华, 王环丽, 李武平, 蔡文河, 董树青, 刘茂生, 曾燕屏. 在役P92钢蒸汽管道焊接接头中缺陷的研究[J]. 机械工程学报, 2017, 53(18): 113-120.
[3]	杨云帆, 陶功权, 付青云, 钟文生, 温泽峰. 直线电动机地铁线路焊接接头不平顺测试分析及安全限值研究[J]. 机械工程学报, 2017, 53(10): 125-135.
[4]	李宇力, 王文先, 陈洪胜, 武翘楚, 赵骏超. B₄C/6061Al复合材料焊接接头组织与力学性能研究^*[J]. 机械工程学报, 2016, 52(22): 38-44.
[5]	陈天瑞, 项延训, 陈虎, 轩福贞, 陈定岳. 基于相位-频率测量的材料残余应力超声表征方法^*[J]. 机械工程学报, 2016, 52(22): 9-14.
[6]	龙旦风, 黄成海, 向东, 徐卫国, 王一江, 江伟. 基于应力转换的内螺纹高周疲劳强度分析方法^*[J]. 机械工程学报, 2016, 52(21): 175-181.
[7]	杜彦楠, 朱明亮, 轩福贞. 应力比对25Cr2Ni2MoV钢焊接接头近门槛值区疲劳裂纹扩展曲线转折点的影响[J]. 机械工程学报, 2015, 51(8): 44-49.
[8]	宋烨, 邬平波, 贾璐. 扭转刚度测试方法及对构架疲劳强度影响[J]. 机械工程学报, 2015, 51(20): 164-170.
[9]	马婧, 赵子华, 聂宝华, 郑志腾, 张峥. TC21钛合金电子束焊接接头超高周疲劳行为研究[J]. 机械工程学报, 2015, 51(12): 69-75.
[10]	吴健栋, 蔡志鹏, 汤之南, 李克俭, 王梁, 潘际銮, 霍鑫, 许晓进. 低周疲劳过程损伤变量的复合分析法和三阶段损伤演化模型[J]. 机械工程学报, 2015, 51(10): 86-95.
[11]	刘龙隆;轩福贞;朱明亮. 25Cr2Ni2MoV钢焊接接头的超高周疲劳特性[J]. , 2014, 50(4): 25-31.
[12]	安同邦;单际国;魏金山;杜全斌;彭云;田志凌. 热输入对1 000 MPa级工程机械用钢接头组织性能的影响[J]. , 2014, 50(22): 42-49.
[13]	朱有利;王燕礼;边飞龙;侯;帅;谢俊峰. 金属材料超声表面强化技术的研究与应用进展[J]. , 2014, 50(20): 35-45.
[14]	王强;赵永翔;王欢. 铁路D1车轮钢的疲劳可靠性寿命与强度的试验及表征[J]. , 2014, 50(14): 50-55.
[15]	李凡松;邬平波;曾京;王建斌. 构架三种常用疲劳强度校核方法对比研究[J]. , 2014, 50(14): 170-176.

改善焊接接头疲劳强度超声冲击法的试验研究

THE INVESTIGATION OF EXPERIMENTS TO IMPROVING THE FATIGUE STRENGTH OF WELDED JOINTS BY ULTRASONIC PEENING METHOD

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 15

编辑推荐

Metrics

本文评价