董大林,王刚,王栋.电化学剥层在齿轮钢残余应力测量中的应用[J].表面技术,2018,47(10):315-320.
DONG Da-lin,WANG Gang,WANG Dong.Application of Electrochemical Stripping in the Residual Stress Measurement in a Gear Steel[J].Surface Technology,2018,47(10):315-320 |
| 电化学剥层在齿轮钢残余应力测量中的应用 |
| Application of Electrochemical Stripping in the Residual Stress Measurement in a Gear Steel |
| 投稿时间：2018-02-12 修订日期：2018-10-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2018.10.043 |
| 中文关键词: 电化学抛光 台阶式剥层 电解液筛选 18CrNiMo7-6齿轮钢 抛光参数 残余应力 |
| 英文关键词:electrochemical polishing step stripping layer electrolyte selection 18CrNiMo7-6 gear steel polishing param-eters residual stress |
| 基金项目:河南省高等学校重点科研项目（17A460026） |
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| Author | Institution |
| DONG Da-lin | Henan Key Engineering Laboratory for Anti-fatigue Manufacturing Technology, School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China |
| WANG Gang | Henan Key Engineering Laboratory for Anti-fatigue Manufacturing Technology, School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China |
| WANG Dong | Henan Key Engineering Laboratory for Anti-fatigue Manufacturing Technology, School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China |
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| 中文摘要: |
| 目的 用电化学抛光法对18CrNiMo7-6齿轮钢进行台阶式剥层，研究残余应力沿深度层的分布。 方法 为了达到剥层效果并保证表面质量，选取了适用于钢材的三种电解液，通过试验结果分析，选定一种电解液用于本试验。选定电解液后，以表面粗糙度和光亮度作为评判标准，通过单因素试验法确定适用于18CrNiMo7-6齿轮钢的电流密度、最佳剥层时间。运用三维表面形貌测量系统测量试样微观台阶结构，运用X射线残余应力分析仪测量每层台阶残余应力值，得到残余应力沿深度层的分布。结果 测得的原始表面残余应力为-243 MPa，随着剥层深度（每层约15 μm）的增加，残余应力由压应力逐渐变为拉应力，深度达到85 μm时，残余应力稳定在50 MPa左右。优选出适用于18CrNiMo7-6齿轮钢的电化学剥层参数：电解液组成为20%H2SO4+60%H3PO4+20%H2O，电流密度为0.49 A/cm2，抛光时间为25 min。结论 利用电化学抛光可实现对齿轮钢试样进行台阶式剥层，该方法相较于传统电化学剥层的优势在于每层表面均有保留，有利于对任意层的残余应力进行反复测试以及对其他性能的研究。 |
| 英文摘要: |
| The work aims to strip 18CrNiMo7-6 gear steel by step with electrochemical polishing method and study the dis-tribution of residual stress along the depth layer. In order to achieve the stripping effect and ensure the surface quality simulta-neously, three kinds of electrolyte applicable to steel were selected and an electrolyte was determined to be used for this experiment according to the test analysis. After the electrolyte was selected, the surface roughness and brightness were used as the criterion to determine the applicable current density and optimal stripping time for 18CrNiMo7-6 gear steel by a single factor test method. The three-dimensional surface topography measurement system was used to measure the micro-step structure of samples and the X-ray residual stress analyzer were applied to study the residual stress of each step so as to obtain the distribution of residual stress along the depth layer. The residual stress at the original surface of the sample was -243 MPa and increased as the stripping depth (15 μm per layer). The residual stress gradually changed from the compressive stress to the tensile stress and then stabilized at about 50 MPa when the depth reached 85 μm. The electrochemical stripping parameters suitable for 18CrNiMo7-6 gear steel were optimized: the electrolyte composition was 20%H2SO4+60%H3PO4+20%H2O, the current density was 0.49 A/cm2, and the polishing time was 25 min. The electrochemical polishing method can be used to strip the surface of gear steel sample by step. Compared with traditional electrochemical stripping methods, the advantage lies in the reservation of each layer surface, so we can retest the residual stress of any layer and study other properties. |
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