等温淬火对 700 MPa 冷轧 TRIP 钢 0.15C-1. 5Mn-l. 4Si-0. 03Nb-0. 03Ti-0. 005N力学性能的影响

特殊钢 ›› 2014, Vol. 35 ›› Issue (1): 53-56.

等温淬火对 700 MPa 冷轧 TRIP 钢 0.15C-1. 5Mn-l. 4Si-0. 03Nb-0. 03Ti-0. 005N力学性能的影响

姚春发、李光瀛

钢铁研究总院，北京100081

收稿日期:2013-08-17 出版日期:2014-02-01 发布日期:2022-09-06
作者简介:姚春发(1964-),男，高级工程师，北京化工大学(本科)毕业，产品开发研究。

Effect of Austempering on Mechanical Properties of 700 MPa Cold Rolled TRIP Steel 0.15C-1.5Mn-l. 4Si-0. 03Nb-0.03Ti-0.005N

Yao Chunfa 、 Li Guangying

Central Iron and Steel Research Institute, Beijing 100081

Received:2013-08-17 Published:2014-02-01 Online:2022-09-06

摘要/Abstract

摘要： 试验钢由50 kg真空感应炉冶炼,锻造成60 mm板坯经1 250℃均匀化处理后热轧至4 mm板,再冷轧至1 mm板。研究了试验TRIP(转变诱发塑性)钢冷轧板820℃3 min淬火时等温淬火温度(350~450℃)和保温时间(1~10 min)对钢的组织性能的影响。结果表明,奥氏体等温淬火工艺对试验钢的力学性能有显著影响;最佳的等温淬火工艺为820℃3 min+400℃5min水冷,该钢的抗拉强度与总伸长率分别为766 MPa与37%,即强塑积达28.34 GPa·%;10 nm级Nb(CN)粒子的大量析出是造成该试验钢强度显著提高的主要原因。

关键词: Ti-Nb微合金化, TRIP钢, 冷轧板, 等温淬火, 组织, 力学性能

Abstract: Test steel is melted by a 50 kg vacuum induction furnace, forged to 60 mm slab, homogenized at 1 250 ℃ then hot-rolled to 4 mm plate and cold rolled to 1 mm sheet. The effect of austempering temperature (350 ~ 450 °C) and holding time (1 ~ 10 min) on structure and mechanical properties of 820℃ 3 min quenched test TRIP steel cold-rolled sheet has been studied. Results show that the effect of process of austempering on mechanical properties of test steel is obvious； the optimum austempering process is 820℃ 3 min +400℃ 5 min, water cooling, the tensile strength and total elongation are respectively 766 MPa and 37%, i. e. the strength-plasticity product is 28. 34 GPa , % ； a lot of Nb (CN) particles precipitation with 10 nanometer size is main factor to increase the strength of test steel.

姚春发、李光瀛. 等温淬火对 700 MPa 冷轧 TRIP 钢 0.15C-1. 5Mn-l. 4Si-0. 03Nb-0. 03Ti-0. 005N力学性能的影响[J]. 特殊钢, 2014, 35(1): 53-56.

Yao Chunfa 、 Li Guangying. Effect of Austempering on Mechanical Properties of 700 MPa Cold Rolled TRIP Steel 0.15C-1.5Mn-l. 4Si-0. 03Nb-0.03Ti-0.005N[J]. Special Steel, 2014, 35(1): 53-56.

参考文献

[1]江海涛，唐荻,米振莉.汽车用先进高强度钢的开发及应用进展[J].钢铁研究学报,2007,19(8):1-6.
[2] Shi J, Sun X J, Dong H. Ultrafine Grained High Strength Low Alloy Steel with High Strength und High Ductility [J]. Materials Science Forum,2010,654-656 ： 238-241.
[3]李麟.相变型性钢一原理、性能、设计和应川[M].北京:科学出版社,2009.
[4] Kim S J, C G, Choi I ,el al. Effects of Heat Treatment and Alloying Elements on the Microstructures and Mechanical Properties of 0. 15wl Pci C Transformation-induced Plasticity-aided Cold-rolled Steel Sheets [J]. Metallurgical and Materials Transactions A, 2001, 32(3):505-514.
[5] Srivaslavu A K, Jha G, Gope N, el al. Effect of Heat Treatment on Microstructure and Mechanical Properties of Cold Rold Rolled C-Mn- Si TRIP-aided Steel [J]. Materials Characterization, 2006,57 (2): 127-135.
[6] Sugimoto K, Misu M, Kobayashi M, et al. Effects of Second Phase Morphology on Retained Austenite Morphology and Tensile Properties in a TRIP-aided Dual-phase Steel Sheet[J]. ISIJ International, 1993,33(7):775-782.
[7] Timokhina I B, Hodgson P D, Pereloma E V. Effect of Microstructure on the Stability of Retained Austenite in Transformation-Induced- Plasticity Steels [J]. Metallurgical and Materials Transactions ,2004, 35A：2331-2341.
[8] Chen Y, Chen X, Yuan Z X, et al. Effects of Carbon Content and Rolling Processing on Retained Austenite for Hol-Rolled TRIP Steels [J]. Acta Metallurgica Sinica,2002,15(5) ：439-447.
[9]尹云洋，杨王玥，李龙飞，等.Al部分替代Si对基于动态相变热轧TRIP钢组织控制的影响[J].金属学报,2008,44(11)：1292-1298.
[10] Matsuda H, Kitano F, Hasegawa K, et al. Metallurgy of Continuously Annealed High Strength TRIP Steel Sheet [J]. Steel Research, 2002,73(6-7) ：211-217.
[11]毛新平.薄板坏连铸连轧微合金化技术[M].北京:冶金工业出版 111：,2008.
[12] Grajear A, Krztoft H. Efftict of hothennal Bainilic Transformation Temperaure on Retained Auslenite Fraction in C-Mn-Si-Al-Nb-Ti TRIP-type Steel [J]. Journal of Achievements in Materials and Manufacturing Engineering,2009,35(2) ； 169-176.
[13]雍岐龙，马鸣图，吴宝榕.微介金钢一物理和力学冶金[M].北京:机械工业出版社，1989.
[14] Hashimoto S, Ikeds S, Sugimolo K, el ul. Effects of Nb and Mo Addition to 0. 2% C-l. 5% Si-1.5% Mn Steel on Mechanical Properties of Hot Rolled TRIP-aided Steel Sheets [J]. ISIJ International, 2004,44(9) ： 1590-1598.
[15] Gladman T. Precipitation Hardening in Metals [J]. Material Science and Technology, 1999,15 ：30-36.
[16]雍岐龙.钢铁材料中的第二相[M].北京：冶金工业出版社，2006.