行星架内花键感应淬火工艺改进

Improvement of spline induction quenching process in the planetary frame

摘要: 针对行星架内花键感应淬火过程中存在的淬火开裂问题，本研究通过优化工艺参数，提高淬火介质浓度，解决了内花键感应淬火开裂问题。首先，分析了内花键感应淬火开裂的原因，从化学成分、宏观裂纹形态、工艺等方面对淬火开裂原因进行了分析，采用降低加热功率、多段加热、提高淬火介质浓度等方式，解决了内花键感应淬火开裂问题。实验结果表明：改进后内花键表面硬度达到HRC46-53，齿侧淬硬层深度达到≥2MMM，变形控制在0.18-0.25MM之间。

Abstract: SPLINE INDUCTION IN THE PLANETARY SHELF IN THIS STUDY, THE PROBLEM OF QUENCHING CRACKING BY INTERNAL SPLINE INDUCTION WAS SOLVED BY OPTIMIZING THE PROCESS PARAMETERS AND INCREASING THE CONCENTRATION OF QUENCHING MEDIUM. FIRSTLY, THE CAUSES OF INTERNAL SPLINE INDUCTION QUENCHING CRACKING ARE ANALYZED, AND THE CAUSES OF QUENCHING CRACKING ARE ANALYZED FROM THE ASPECTS OF CHEMICAL COMPOSITION, MACROSCOPIC CRACK MORPHOLOGY AND PROCESS, AND THE PROBLEM OF INTERNAL SPLINE INDUCTION QUENCHING CRACKING IS SOLVED BY REDUCING THE HEATING POWER, MULTI-STAGE HEATING, AND INCREASING THE CONCENTRATION OF THE QUENCHING MEDIUM. THE EXPERIMENTAL RESULTS SHOW THAT THE SURFACE HARDNESS OF THE INNER SPLINE REACHES HRC46-53, THE DEPTH OF THE HARDENED LAYER ON THE TOOTH SIDE REACHES ≥2MMM, AND THE DEFORMATION IS CONTROLLED BETWEEN 0.18-0.25MM.