Effect of Baking Process on Microstructures and Mechanical Properties of Low Silicon TRIP Steel Sheet With Niobium

钢铁研究学报(英文版), 2010, 17(7): 68-74.

^1, , ^2, , ^3, , ^4, , ^5,

1.College of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China; State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China

2.College of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China; State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China

3.College of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China

4.College of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China

5.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China

基金项目: National Natural Science Foundation of China(50527402)

Effect of Baking Process on Microstructures and Mechanical Properties of Low Silicon TRIP Steel Sheet With Niobium

TANG Zheng-you ^1, , DING Hua ^2, , DING Hao ^3, , CAI Ming-hui ^4, , DU Lin-xiu ^5,

3.College of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China

4.College of Materials and Metallurgy, Northeastern University, Shenyang 110004, Liaoning, China

5.State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China

Keywords： TRIP steel sheet

After 2% predeformation, the baking treatment with different schedule was carried out for low silicon TRIP steel sheet with niobium. The effects of baking temperature and time on microstructures and mechanical prop-erties were investigated. The results showed that with increasing the baking temperature and time, the volume frac-tion of retained austenite decreases, and the volume fraction of tempered martensite increases; as baking temperature ranges from 80 ℃ to 170 ℃, the bake-hardening (BH) value increases obviously, while from 170 ℃ to 230 ℃, the variation of BH value is very slight; as baking time ranges from 2 min to 20 min, the BH value increases significantly,while the BH value decreases when baking time exceeds 20 min. So that when the baking temperature is 170 ℃ and the baking time is 20 min, the low silicon TRIP steel sheet exhibits good bake-hardening behavior, and the highest BH value is above 70 MPa.

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Effect of Baking Process on Microstructures and Mechanical Properties of Low Silicon TRIP Steel Sheet With Niobium

参考文献