Effect of heating process on Cu precipitation and cracking of high-strength weather-resistant steel
LI Guo-cang 1， LIANG Liang 1，2， PENG Qi-chun 3， WANG Zhao-dong 2
1. Hunan Valin Lianyuan Iron and Steel Co.， Ltd.， Loudi 417009， China； 2. The State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China； 3. College of Materials and Metallurgy ，Wuhan University of Science and Technology ，Wuhan 430081， China
Abstract： The effect of hot rolling process on Cu precipitation and cracking of high-strength weather-resistant steel was investigated by optical microscope （OM） and transmission electron microscope （TEM）. The results showed that the size and quantity of Cu precipitates could be significantly reduced by increasing the austenitizing temperature and extending the holding time. Therefore, the temperature should be rapidly increased above 1 200 ℃ and kept for long time in practice production. The staying in range of 1 083-1 200 ℃ should be avoided to prevent the formation of cracking. Furthermore, the cracks on slab were observed during hot transferring and hot charging at 750 ℃ for 70% large deformation. Therefore, in order to reduce the cracking in rolling process, such steel should be kept away from the hot transferring and hot charging at two-phase region temperature as well as large deformation.
收稿日期: 2020-02-08
引用本文:
李国仓， 梁 亮， 彭其春， 王昭东. 加热工艺对高强耐候钢Cu析出和裂纹的影响[J]. 物理测试, 2020, 38(6): 1-.
LI Guo-cang， LIANG Liang， PENG Qi-chun， WANG Zhao-dong. Effect of heating process on Cu precipitation and cracking of high-strength weather-resistant steel. PHYSICS EXAMINATION AND TESTING, 2020, 38(6): 1-.
2020, Vol. 38 
