EH36高强度船板钢奥氏体连续冷却的转变行为
Transformation Behavior of Austenite of EH36 Ship Plate Steel during Continuous Cooling
摘 要
利用Gleeble 2000型热模拟试验机对EH36船板钢连续冷却相变行为以及在增速冷却和减速冷却条件下的相变行为进行了研究.结果表明:在连续冷却条件下,在400~650 ℃范围内,冷却速率在4~16 ℃/s时,相变组织以贝氏体组织为主且随着冷速的增大贝氏体的体积分数增加;在冷却速率≥1 ℃/s时,先以一定速率冷却至600 ℃,然后将冷速减半时,其显微组织与半速恒速冷却组织相近;而先以一定速率冷却至600 ℃,然后将冷速加倍时,其显微组织与两倍速恒速冷却的显微组织相近.
奥氏体
连续冷却
相变
EH36 ship steels
austenite
continuous cooling
phase transformation
Abstract
Using Gleeble 2000 thermal-mechanical simulator, the phase transformation behavior of EH36 ship steels was studied after cooling with constant, increasing and decreasing rate, respectively.Results show that the ultimate microstructure is mainly bainite when the cooling rate is 4-16 ℃/s and the temperature is located in the range of 400-650 ℃ during continuous cooling,the proportion of bainite is increasing along with increment of cooling rate;After cooling to 600 ℃ with 1 ℃/s or higher constant rate at first stage and then with the rate of half the initial value,the final microstructure is similar to that achieved after cooling with the second stage rate constantly.Furthermore,if the cooling rate at the second stage is double the initial rate,the microstructure also accord with that achieved after cooling just with the second stage rate.
中图分类号 TG111.7
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收稿日期 2005/12/31
修改稿日期 2006/6/8
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备注邱春林(1964-),男,辽宁北镇人,副教授.
引用该论文: QIU Chun-lin,WANG Jian-gang,GAO Xiu-hua,SONG Zhen-guan,QI Ke-min,SUN Wei-hua,SUN Hao. Transformation Behavior of Austenite of EH36 Ship Plate Steel during Continuous Cooling[J]. Materials for mechancial engineering, 2006, 30(12): 76～79
邱春林,王建刚,高秀华,宋振官,齐克敏,孙卫华,孙浩. EH36高强度船板钢奥氏体连续冷却的转变行为[J]. 机械工程材料, 2006, 30(12): 76～79
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