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采用正交试验法研究了淬火加热温度、淬火保温时间、回火加热温度和回火保温时间对26CrMoNbTiB钻杆用钢强韧性的影响。结果表明,回火加热温度对实验钢的强度和伸长率影响最大,淬火加热温度次之。当淬火温度为910℃、保温时间为35 min,回火温度和时间分别为590℃和65 min时,26CrMoNbTiB钢的屈服强度为898 MPa,抗拉强度为973 MPa,伸长率为17.4%,具有良好的综合力学性能。
The effects of quenching temperature, quenching holding time, tempering heating temperature and tempering holding time on the toughness of 26CrMoNbTiB drill pipe steel were studied by orthogonal test. The results show that the tempering heating temperature has the greatest effect on the strength and elongation of the experimental steel, followed by the quenching temperature. When the quenching temperature is 910 ℃, the holding time is 35 min, the tempering temperature and time are 590 ℃ and 65 min respectively, the yield strength of 26CrMoNbTiB steel is 898 MPa, the tensile strength is 973 MPa and the elongation is 17.4% Has a good comprehensive mechanical properties.