Abstract：It was found that the hardness exceeded the standard when producing ø110 mm high wear-resistant alloy steel in the new medium-sized workshop of Special Steel Group. The CCT curve of the steel was measured through the thermal simulation test. The influence law of different cooling rate on phase transformation and microstructure hardness was obtained. The results showed that when the cooling rate was not higher than 0.2 ℃/s, the ferrite and pearlite transformation mainly occurred, and the hardness was not higher than 20.5HRC. When the cooling rate was in range of 0.5-2 ℃/s, the bainite and martensite transformation mainly occurred, and the hardness was in range of 40-51.7HRC. When the cooling rate was not less than 4 ℃/s, the martensitic transformation mainly occurred, and the hardness was less than or equal to 54.4HRC. According to the CCT curve, the round steel with hardness less than or equal to 21HRC could be obtained only when the cooling rate was controlled below 0.2 ℃/s in the rolling process in the workshop.
李金浩, 王宗斌. 高耐磨圆钢硬度控制生产实践[J]. 物理测试, 2023, 41(3): 1-6.
LI Jinhao, WANG Zongbin. Production practice of hardness control for high wear resistant round steel. PHYSICS EXAMINATION AND TESTING, 2023, 41(3): 1-6.
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2023, Vol. 41 
