摘要
采用箱式炉加热及光学显微分析法研究了模拟锻造加热后两相区不同冷却速度和正火对非调质钢C38 + N组织和性能的影响。结果表明:在700～500℃的两相区以15℃/min冷速控制冷却,可使C38 + N钢获得较其他控冷工艺更均匀的网状铁素体和珠光体组织,铁素体比例约9%,表现为良好的综合力学性能;通过对C38 + N钢950℃正火,可以显著细化晶粒,并彻底改变铁素体形态,在保留高强度的同时大幅提高塑韧性。
The effects of different cooling rates and normalizing on the microstructure and properties of non-quenched and tempered steel C38 + N after simulated forging heating were studied by means of box furnace heating and optical microanalysis. The results show that in two-phase zone of 700-500 ℃,the cooling can be controlled at the cooling rate of 15 ℃/min,which makes the C38 + N steel obtain more uniform reticular ferrite and pearlite structure than other controlled cooling processes. The ferrite ratio is about 9%,which has a good comprehensive mechanical properties. By normalizing at 950 ℃,the grain of the C38 + N steel can be remarkably refined,and the ferrite morphology is completely changed,and the plastic toughness is greatly improved while retaining high strength.
作者
米丰亮
张兆伟
康鸿胜
菅宝柱
吕宇鹏
李建祖
Mi Fengliang;Zhang Zhaowei;Kang Hongsheng;Jian Baozhu;Lti Yupeng;Li Jianzu(School of Materials Science and Engineering,Shandong University,Jinan Shandong 250061,China;Sinotruck Jinan Casting and Forging Center,Jinan Shandong 250116,China)
出处
《金属热处理》
CAS
CSCD
北大核心
2019年第1期67-71,共5页
Heat Treatment of Metals
基金
国家重点研发计划(2017YFB0305101)
关键词
非调质钢C38+N
控制冷却
网状铁素体
正火
non-quenched and tempered steel C38 +N
controlled cooling
ferrite net
normalizing
