Email Alert  RSS
实用技术

磁痕显示对激光强化17-4PH叶片力学性能的影响

展开
  • 哈尔滨汽轮机厂有限责任公司,黑龙江 哈尔滨 150000
韩 亮(1990-),硕士,主要研究方向为金属材料热处理,电话:13704812546,E-mail:hl15238650646@163.com

收稿日期: 2022-08-27

  修回日期: 2022-09-15

  录用日期: 2022-10-26

  网络出版日期: 2023-02-15

Effects of Magnetic Mark Display on Mechanical Properties of Laser-Enhanced 17-4PH Blades

Expand
  • Harbin Steam Turbine Factory Co.,Ltd.,Harbin 150000,China

Received date: 2022-08-27

  Revised date: 2022-09-15

  Accepted date: 2022-10-26

  Online published: 2023-02-15

摘要

为增强17-4PH 钢低压末级叶片的防水蚀性能,对17-4PH 叶片进汽边进行激光固溶处理。经过激光固溶处理的末级叶片在后续磁粉探伤过程中,往往会出现明显的磁痕现象。为此,利用光学显微镜、扫描电镜、X射线衍射仪、电子探针等分析手段证明了在激光固溶区域边界处出现磁痕的原因为在边界出现的大量的奥氏体组织,降低了激光固溶边界处的磁导率,从而产生磁痕。利用XRD 测定激光固溶叶片的残余应力为压应力,三点弯曲疲劳试验证明通过激光固溶可将17-4PH 叶片的R=0.1 疲劳极限由原750 MPa 提高至860 MPa。

本文引用格式

韩亮, 宫伟兴, 冯天澍, 王健泽 . 磁痕显示对激光强化17-4PH叶片力学性能的影响[J]. 材料保护, 2023 , 56(2) : 170 -174 . DOI: 10.16577/j.issn.1001-1560.2023.0048

Abstract

In order to enhance the corrosion resistance of the 17-4PH low-pressure last stage blades,the steam inlet side of the 17-4PH blades needs to be treated with laser-enhanced solid solution.The last stage blades treated with laser solution often show obvious magnetic marks in the subsequent magnetic particle inspection.Optical microscope,scanning electron microscope,X-ray diffractometer,electron probe and other analytical means were used to prove that the reason for the appearance of magnetic marks at the boundary of the laser solid solution region was a large number of austenite structures that appeared at the boundary,which reduced the permeability at the boundary of the laser solid solution region.Besides,the residual stress of laser solid solution blade was determined as compressive stress by XRD,and the three-point bending fatigue test showed that the R=0.1 fatigue limit of 17-4PH blade could be increased from 750 MPa to 860 MPa by laser-enhanced solid solution.

参考文献

[1] 路媛媛,肖 鱼,赖 境,等.激光固溶对17-4PH 不锈钢力学性能的影响[J].金属热处理,2019,44(2):156-162.LU Y Y,XIAO Y,LAI J,et al.Effect of laser solid solution treatment on mechanical properties of 17-4PH stainless steel[J].Heat Treatment of Metals,2019,44(2):156-162.

[2] 薛承感,潘慧斌,丁银萍,等.17-4PH 汽轮机叶片激光固溶强化抗汽蚀性能研究[J].动力工程学报,2020,40(1):82-88.XUE C G,PAN H B,DING Y P,et al.Cavitation Erosion Behavior of 17-4PH Steam Turbine Blades Treated by Laser Solid Solution[J].Journal of Chinese Society of Power Engineering,2020,40(1):82-88.

[3] 叶诗豪,姚建华,楼程华,等.17-4PH 不锈钢的激光表面固溶工艺研究[J].应用激光,2010,30(6):465-469.YE S H,YAO J H,LOU C H,et al.Study of Laser Surface Solid Solution Experiment on 17-4PH Stainless Steel[J].Applied Laser,2010,30(6):465-469.

[4] 曹 强,黄晓望,汪 盛.1Cr15Ni4Mo3N 沉淀硬化不锈钢磁粉检测疑似裂纹原因分析[J].失效分析与预防,2014,9(2):121-125.CAO Q,HUANG X W,WANG S.Analysis of Suspected Crack of 1Cr15Ni4Mo3N Precipitation-hardening Stainless Steel by Magnetic Part[J].Failure Analysis and Prevention,2014,9(2):121-125.

[5] 王树志,乔海燕,葛子亮,等.17-4PH 马氏体沉淀硬化不锈钢磁粉检测磁痕分析[J].无损检测,2014,36(1):64-70.WANG S Z,QIAO H Y,GE Z L,et al.The Indication Analysis of Magnetic Particle Testing on 17 -4PH Martensitic Precipitation-hardening Stainless Steel[J].Nondestructive Testing,2014,36(1):64-70.

[6] 陈 波.17-4PH 钢热变形特性与高温铁素体析出条件研究[D].上海:上海交通大学,2018.CHEN B.Study on the Thermal Defformation Characteristics of 17-4PH Steel and the Precipitation Conditions of δ-Ferrite[D].Shanghai:Shanghai Jiao Tong University,2018.

[7] 杜锦铮,路媛媛,陈 浩,等.17-4PH 不锈钢透平叶片激光固溶时效强化的力学性能[J].中国表面工程,2018,31(3):9-16.DU J Z,LU Y Y,CHEN H,et al.Mechanical Properties of 17-4PH Stainless Turbin Blades by Laser Solution and Aging[J].China Surface Engineering,2018,31(3):9-16.

文章导航

/