预应变量对超低碳烘烤硬化(ULC-BH)钢硬化性能的影响

特殊钢 ›› 2014, Vol. 35 ›› Issue (1): 61-64.

预应变量对超低碳烘烤硬化(ULC-BH)钢硬化性能的影响

杨晰¹, 李维娟¹, 金晓龙¹, 孙成钱²

1辽宁科技大学材料与冶金学院，鞍山114051 ；
2鞍钢股份公司技术中心，鞍山114009

收稿日期:2013-08-15 出版日期:2014-02-01 发布日期:2022-09-06
作者简介:杨晰(1987-),女，硕士研究生,2011年辽宁科技大学(本科)毕业，烘烤硬化物研究。
基金资助:
国家自然科学基金资助(51274121)

Effect of Prestrain on Bake Hardening property of Ultra-Low Carbon Bake Hardening (ULC-BH) Steel

Yang Xi¹ , Li Weijuan¹, Jin Xiaolong¹ , Sun Chengqian²

1 College of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051 ；
2 Technology Center, Anshan Iron and Steel Co Ltd, Anshan 114009

Received:2013-08-15 Published:2014-02-01 Online:2022-09-06

摘要/Abstract

摘要： 测定了ULC-BH钢1 mm退火冷轧钢板(/%:0.002C,0.008Si,0.60Mn,0.043P,0.009S,0.031Al,0.071Ti)经2%~10%预应变,170℃20 min烘烤后的烘烤硬化(BH)值,通过内耗实验获得不同应变时效下的内耗谱线,利用X射线衍射技术测定位错密度,研究了Cottrell气团对ULC-BH钢烘烤硬化性能的影响。结果表明,随预应变量增加,ULC-BH钢的BH值增大;随预应变量增加,Snoek峰逐渐降低,而SKK峰逐渐升高;经2%、6%和10%预应变,位错密度增大,分别为3.9×10¹⁰/cm~2,8.4×10¹⁰/cm²和6.8×10¹¹/cm²,相应的Cottrell气团密度逐渐减小。

Abstract: The bake hardening values ( BH) of ULC-BH steel 1 mm annealed cold rolled sheet (/%： 0. 002C, 0. 008Si, 0. 60Mn, 0. 043P, 0. 009S, 0. 031 Al, 0.017Ti) with prestraining by 2% ~ 10% and baking al 170 °C for 20 min have been measured, and the effect of Cottrell atmosphere on bake hardening property of ULC-BH sleet is studied by internal friction test getting internal friction spectrum curves at different strain ageing and using X-ray diffraction technique measuring dislocation density. Results show that with increasing prestrain the BH value of ULC-BH steel increases ； and with increasing prestrain the Snoek peak gradually reduces while SKK peak gradually raise； with prestraining by 2%, 6% and 10% the dislocation density increases, and that respectively are 3. 9 x 10¹⁰/cm², 8. 4 x 10¹⁰/cm² and 6. 8 x 10¹¹/cm², while corresponding Cottrell atmosphere density gradually decreases.

杨晰, 李维娟, 金晓龙, 孙成钱. 预应变量对超低碳烘烤硬化(ULC-BH)钢硬化性能的影响[J]. 特殊钢, 2014, 35(1): 61-64.

Yang Xi , Li Weijuan, Jin Xiaolong, Sun Chengqian. Effect of Prestrain on Bake Hardening property of Ultra-Low Carbon Bake Hardening (ULC-BH) Steel[J]. Special Steel, 2014, 35(1): 61-64.

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