Abstract：In order to optimize the rolling process of 15CrNiMo round steel for cone bit, reduce the hydrogen content and hardness of round steel, and reduce the risk of flake defect and stress cracking, the effect of different pit temperature after rolling on the macrohardness, microhardness and microstructure of 15CrNiMo round steel was compared and analyzed. The hydrogen desorption curves and hydrogen contents of round steel were analyzed by thermal desorption spectroscopy (TDS). The results showed that increasing the pit temperature could effectively increase the ferrite structure ratio of steel, thus reducing the overall hardness of steel, and also help to reduce the hydrogen content in steel.
冀鸰，孔祥伟，秦志强. 轧制下线温度对15CrNiMo硬度及析氢行为的影响[J]. 中国冶金, 2019, 29(5): 44-47.
JI Ling,KONG Xiangwei,QIN Zhiqiang. Effect of pit temperature after rolling on hardness and hydrogen diffusion behavior of 15CrNiMo[J]. China Metallurgy, 2019, 29(5): 44-47.
2019, Vol. 29 
