| 引用本文: | 汪志刚,赵征志,赵爱民,叶洁云,程俊业,陈京京.析出相对深冲DP钢组织性能及织构的影响[J].材料科学与工艺,2013,21(5):75-81.DOI:10.11951/j.issn.1005-0299.20130513. |
| WANG Zhi-gang,ZHAO Zheng-zhi,ZHAO Ai- min,YE Jie-yun,CHENG Jun-ye,CHEN Jing-jing.Effect of participation on microstructures, mechanical properties and texture of deep drawing DP steel[J].Materials Science and Technology,2013,21(5):75-81.DOI:10.11951/j.issn.1005-0299.20130513. |
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| 析出相对深冲DP钢组织性能及织构的影响 |
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汪志刚1,2 ,赵征志2 , 赵爱民2 ,叶洁云1,2 ,程俊业2, 陈京京2
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(1. 江西理工大学 材料科学与工程学院,江西 赣州 341000; 2.北京科技大学 冶金工程研究院, 北京 100083 )
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| 摘要: |
| 为了研究析出相对深冲DP钢织构的影响机制,采用Thermo-calc热力学软件计算DP钢的平衡析出相,并利用SEM、TEM与XRD等手段分析了两种不同成分的DP钢组织性能与织构演变.研究表明:试验钢的主要析出相为MC_SHP、M7C3、MnS和AlN；与低Mo钢相比,高Mo钢的奥氏体区被缩小,且MoC的析出温度更高,铁素体晶内与沿晶界形成了大量的纳米级MoC析出；860 ℃退火后,高Mo钢中形成了约3%的均匀弥散分布的马氏体,抗拉强度达到445 MPa,r值为1.5,而低Mo钢发生了贝氏体相变,各项力学性能明显降低；两种试验钢的热轧板织构较弱,冷轧后{223}<110>取向密度稳定增加,退火后均形成了强烈的γ纤维织构,而低Mo钢中{001}<110>织构是导致其r值偏低的主要原因. |
| 关键词: 双相钢 Mo 析出 组织结构 织构 |
| DOI：10.11951/j.issn.1005-0299.20130513 |
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| 基金项目:国家自然科学基金资助项目(50904006);中央高校基本科研业务费专项资金资助项目(FRF-TP-10-001A). |
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| Effect of participation on microstructures, mechanical properties and texture of deep drawing DP steel |
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WANG Zhi-gang1,2, ZHAO Zheng-zhi2, ZHAO Ai- min2, YE Jie-yun1,2, CHENG Jun-ye2, CHEN Jing-jing2
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(1.School of Material Science and Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China; 2.Research Institute of Metallurgy Engineering, University of Science and Technology Beijing, Beijing 100083, China)
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| Abstract: |
| To investigate the effect of participation on texture of deep drawing DP steel, the equilibrium precipitates of DP steel was calculated using Thermo-calc thermodynamic software, and the microstructures, mechanical properties and texture evolution of DP steels with different composition were investigated by SEM, TEM and XRD techniques. The results show that the main precipitates of tested steels are MC_SHP, M7C3, MnS and AlN. Comparing to the steel with low Mo content, the austenite region is narrowed, and the participation temperature of MoC is higher. A large amount of MoC participation is observed in ferrite matrix. After annealing at 860 ℃, a homogeneous, dispersed distribution of 3% martensite was transformed in the steel with high Mo content, which makes the tensile strength up to 445 MPa, and ther value is 1.5. However, the bainite transformation happens in the steel with low Mo content, which makes the mechanical properties strongly reduced. The texture in hot-rolled strip of the two steels is slightly weak, and the {223}<110> component is stability increasing during cold rolling. The high intensity of γ fiber texture is formed during annealing process, and the lower rvalue may be contributed to the {001}<110> orientation in the steel with low Mo content. |
| Key words: DP steel Mo participation microstructures texture |
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