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采用摩擦焊后水淬和空冷的方法研究了２０ＣｒＭｏ＋３５ＣｒＭｏ摩擦焊接头热影响区晶粒状态及其影响因素。研究结果表明，摩擦焊接头近缝区处于动态再结晶状态。分析了其晶粒尺寸与Ｚｅｎｅｒ－Ｈｏｌｏｍｏｎ因子的关系，指出强工艺规范可使晶粒细化，使焊缝韧性提高。
The condition of grain size and its influencing factors in heat affected zone of 20CrMo + 35CrMo friction welding joint were studied by using friction stir welding after water quenching and air cooling. The results show that the near-seam region of the friction welding joint is in a state of dynamic recrystallization. The relationship between the grain size and the Zener-Holomon factor was analyzed. It was pointed out that the strong process specification could refine the grain and improve the toughness of the weld.