Fatigue property of the 05Cr17Ni4Cu4Nb steel weld joints

LI Zhenwei; FENG Linjie; ZHANG Yang; LI Xiaoping; LI Taijiang; LIU Fuguang; WANG Caixia; LI Wei

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Fatigue property of the 05Cr17Ni4Cu4Nb steel weld joints

更新时间：2025-09-28

- Fatigue property of the 05Cr17Ni4Cu4Nb steel weld joints
- Thermal Power Generation Vol. 42, Issue 9, Pages: 108-111(2013)
- 作者机构：
  
  1. 华能平凉发电有限责任公司
  2. 西安热工研究院有限公司
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG457.11
- Published：2013
- 稿件说明：
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LI Zhenwei, FENG Linjie, ZHANG Yang, et al. Fatigue property of the 05Cr17Ni4Cu4Nb steel weld joints[J]. Thermal power generation, 2013, 42(9): 108-111.
DOI：

LI Zhenwei, FENG Linjie, ZHANG Yang, et al. Fatigue property of the 05Cr17Ni4Cu4Nb steel weld joints[J]. Thermal power generation, 2013, 42(9): 108-111. DOI：

摘要

采用四点弯曲疲劳试验方法

测试了汽轮机低压末级动叶片05Cr17Ni4Cu4Nb钢焊接接头的疲劳性能

绘制了该接头的S-N曲线

并与钢母材进行了对比。结果表明:采用优化的焊接、热处理工艺

05Cr17Ni4CuNb钢焊接接头的条件疲劳极限可以达到母材的90%以上;焊缝表面或近表面的显微缺陷及接头的组织不均匀性是影响该焊接接头疲劳性能的主要因素

严格控制焊接工艺、减少焊缝显微缺陷、防止热影响区晶粒过度长大是提高叶片焊接接头疲劳寿命的重要措施。

Abstract

The fatigue property of 05Cr17Ni4Cu4Nb steel(used for the last stage rotor blade of steam turbine)weld joints was studied by means of four-point-bending fatigue test.Moreover

the S-N curve of the weld joints was obtained and compared with that of the parent material.The results showed that

adopting the optimized weld and post weld heat treatment process

the05Cr17Ni4Cu4Nb steel weld joints' conditional fatigue limit could reach 90%of that of the parent metal.The SEM observation of fracture surface of the fatigue specimen indicated that the microdefect in surface or near surface of the weld joints and the microstructure heterogeneity were the main factors affecting the fatigue property of the 05Cr17Ni4Cu4Nb steel weld joints.Thus

several important measures enhancing fatigue life of the weld joints were put forward

such as strictly controlling the welding procedure

decreasing the weld microstructure defects

and preventing the over growth of crystalline grain in heat affected zone.

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