• CN：11-2187/TH
  • ISSN：0577-6686
机械工程学报

机械工程学报 ›› 2016, Vol. 52 ›› Issue (20): 16-22.doi: 10.3901/JME.2016.20.016

• 仪器科学与技术 • 上一篇    下一篇

扫码分享

等离子喷焊熔覆层的磁记忆应力评价*

黄海鸿, 韩刚, 杨成, 钱正春   

  1. 合肥工业大学机械工程学院 合肥 230009
  • 出版日期:2016-10-20 发布日期:2016-10-20
  • 作者简介:

    黄海鸿，男，1980年出生，博士，教授，博士研究生导师。主要从事绿色制造与再制造方面的研究。

    E-mail：huanghaihong@hfut.edu.cn

  • 基金资助:
    * 中美国际(地区)合作与交流(51561125002)和教育部新世纪优秀人才支持计划(NCET-12-0837)资助项目; 20160203收到初稿，20160708收到修改稿;

Stress Evaluation of Plasma Sprayed Cladding Layer Based on Metal Magnetic Memory Testing Technology

HUANG Haihong, HAN Gang, YANG Cheng, QIAN Zhengchun   

  1. School of Mechanical Engineering， Hefei University of Technology， Hefei 230009
  • Online:2016-10-20 Published:2016-10-20

PDF

234

摘要：

运用金属磁记忆检测技术对等离子喷焊熔覆层进行应力评价。对标准等离子喷焊熔覆层试样进行静载拉伸试验，检测不同拉伸应力下熔覆层表面的磁记忆信号法向分量Hp(y)和切向分量Hp(x)，分析Hp(y)梯度值K及Hp(x)均值Hp(x)avg随拉伸应力的变化。结果表明：在弹性阶段，Hp(y)曲线随着拉伸应力的增大逆时针旋转，K值随着拉伸应力的增大呈指数增加;同时Hp(x)avg随着拉伸应力的增大而线性增加。在塑性阶段，Hp(y)曲线随着拉伸应力的继续增大而顺时针旋转且K值减小;同时Hp(x)avg随着拉伸应力的增大而线性减小。基于等离子喷焊熔覆层微观组织和磁机械效应探讨了熔覆层应力的磁记忆评价机理。

关键词: 等离子喷焊, 拉伸应力, 熔覆层, 微观组织, 金属磁记忆

Abstract:

For achieving the stress evaluation of plasma sprayed cladding layer based on metal magnetic memory testing technology, static tensile tests of plasma spraying specimen are carried out. Meanwhile, the magnetic signal is measured through the tensile tests. The normal component of magnetic signal, Hp(y), and its gradientK, the tangential component of magnetic signal, Hp(x), and its average value, Hp(x)avg, changing with tensile stress are investigated. The results indicate that theHp(y) rotated anticlockwise and its gradientK increase exponentially, andHp(x)avg increases linearly with the increase of stress in the elastic stage. While in the plastic stage, theK andHp(x)avg decrease with the further increase of stress. The mechanism of stress evaluation of plasma sprayed cladding layer is discussed from viewpoint of the microstructure and magneto-mechanical effect.

Key words: cladding layer, microstructure, plasma spraying, tensile stress, metal magnetic memory

版权所有 © 2019 《机械工程学报》编辑部 | 京ICP备05055788号-30