重载数控铣床SAE8620H钢双联齿轮光纤激光焊接接头的组织与性能研究

Research on Microstructure and Properties of Heavy Duty CNC Milling Machine SAE8620H Steel Duplex Gear Fiber Laser Welded Joint

采用光纤激光焊接方法进行重载数控铣床SAE8620H钢双联齿轮的焊接试验,并进行显微组织、力学性能、疲劳性能和X光无损检测与分析。结果表明,该接头成形性好、无明显焊接缺陷、力学性能和疲劳性能均较好,接头的抗拉强度、屈服强度、伸长率和疲劳寿命分别达到母材的96.8%、97.2%、94.0%和91.5%。

The optical fiber laser welding method was used for welding test of heavy duty CNC milling machine SAE8620 H steel duplex gear, and the microstructure, mechanical properties, fatigue performance and X-ray nondestructive testing and analyzing were carried out. The results show that the welded joint has good formability, no obvious welding defects, better mechanical performance and fatigue performance. The tensile strength, yield strength, elongation and fatigue life is 96.8%, 97.2%, 94.0% and 96.8% of matrix material, respectively.