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选定30MnCr22钢管为研究对象,研究了奥氏体化温度和保温时间、回火温度和保温时间等对钢管抗拉强度、屈服强度、伸长率和冲击吸收能量的影响,观察了不同热处理制度下试样的显微组织,提出了适宜于工业化生产的热处理工艺。结果表明,奥氏体化温度和保温时间对钢管的抗拉强度与屈服强度均有较大影响。随着回火温度的提高及保温时间的延长,钢管的抗拉强度与屈服强度逐渐降低,而伸长率和冲击吸收能量不断上升。
The effects of austenitizing temperature, holding time, tempering temperature and holding time on the tensile strength, yield strength, elongation and impact absorption energy of 30MnCr22 steel tube were studied. The effects of different heat treatment systems Under the microstructure of the sample, put forward a suitable heat treatment process for industrial production. The results show that the austenitizing temperature and holding time on the tensile strength and yield strength of steel have a greater impact. With the increase of tempering temperature and holding time, the tensile strength and yield strength of steel pipe gradually decrease, while the elongation and impact absorption energy increase.