河北联合大学学报（自然科学版）
河北聯閤大學學報（自然科學版）
하북연합대학학보（자연과학판）
Journal of Hebei United university natural sclence edition
2015年
1期
34-39
,共6页
ULC-BH 钢%固溶C%BH2 值%Ae值%自然时效
ULC-BH 鋼%固溶C%BH2 值%Ae值%自然時效
ULC-BH 강%고용C%BH2 치%Ae치%자연시효
ultra low carbon bake hardening steel%solution carbon%the BH2 value%the Ae value%natural ag-ing
经过不同的时效处理研究了固溶C含量对ULC-BH 钢抗自然时效性能的影响。试验结果表明,ULC-BH 钢在170℃×500 min的长时间烘烤过程中,固溶C原子会发生偏聚并形成柯氏气团,BH2与Ae值逐渐增加；当柯氏气团达到饱和后,BH2与 Ae 值出现平台,之后变化不大；固溶C含量越高,相应的 BH2值越大；当固溶 C 含量为18.9 ppm 时,BH2值为46.2 MPa；固溶C含量为32.5 ppm时,BH2值可以达到74.4 MPa；同时固溶C含量越高,引起屈服强度与Ae值均变大,但是为保证 ULC-BH 钢板经自然时效后的成形性能,钢板固溶 C 含量不应过高,当平整量为1%时,固溶C含量为18.9 ppm的钢板的性能较好。
經過不同的時效處理研究瞭固溶C含量對ULC-BH 鋼抗自然時效性能的影響。試驗結果錶明,ULC-BH 鋼在170℃×500 min的長時間烘烤過程中,固溶C原子會髮生偏聚併形成柯氏氣糰,BH2與Ae值逐漸增加；噹柯氏氣糰達到飽和後,BH2與 Ae 值齣現平檯,之後變化不大；固溶C含量越高,相應的 BH2值越大；噹固溶 C 含量為18.9 ppm 時,BH2值為46.2 MPa；固溶C含量為32.5 ppm時,BH2值可以達到74.4 MPa；同時固溶C含量越高,引起屈服彊度與Ae值均變大,但是為保證 ULC-BH 鋼闆經自然時效後的成形性能,鋼闆固溶 C 含量不應過高,噹平整量為1%時,固溶C含量為18.9 ppm的鋼闆的性能較好。
경과불동적시효처리연구료고용C함량대ULC-BH 강항자연시효성능적영향。시험결과표명,ULC-BH 강재170℃×500 min적장시간홍고과정중,고용C원자회발생편취병형성가씨기단,BH2여Ae치축점증가；당가씨기단체도포화후,BH2여 Ae 치출현평태,지후변화불대；고용C함량월고,상응적 BH2치월대；당고용 C 함량위18.9 ppm 시,BH2치위46.2 MPa；고용C함량위32.5 ppm시,BH2치가이체도74.4 MPa；동시고용C함량월고,인기굴복강도여Ae치균변대,단시위보증 ULC-BH 강판경자연시효후적성형성능,강판고용 C 함량불응과고,당평정량위1%시,고용C함량위18.9 ppm적강판적성능교호。
The effect of solution carbon content on natural aging resistance of the ultra-low-carbon bake hardening steel sheet by different aging treatments were studied.The results show that when the steels are aged at 170 ℃ for 500 min,solute carbon atoms will segregate and formate Cottrell atmospheres,the in-crement in yield stress BH2 and yield point elongation Ae increase with it;after atmosphere saturation, both BH2 and Ae remain constant or change slightly with further aging;with the increasing of the solution carbon content,the maximum increment BH2 is higher,the maximum increment BH2 of the solution car-bon content 32.5 ppm is 74.4 MPa,the solution carbon content 18.9 ppm is 46.2 MPa;meanwhile with the increasing of the solution carbon content,both yield strength and Ae are higher;but in order to ensure the formability after natural aging,the solution carbon content should not be too high,on the condition of the flat amount was 1%,the performance of the steel containing the solution carbon content 18.9 ppm is bet-ter.
