Effect of Asymmetric Rolling on Microstructures,Texture and Formability of SUS430 Ferritic Stainless Steel
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摘要: 利用X射线衍射技术和金相显微镜观察等手段,研究异步轧制工艺对SUS430铁素体不锈钢组织织构与深冲性能的影响。结果表明:异步轧制技术可以适当细化再结晶晶粒,但是晶粒大小、分布不均匀。织构分析表明,采用异步一次冷轧工艺沿着板厚方向可获得均匀、完整的γ纤维织构,但强度相对较弱,而应用异步二次冷轧,经过两次退火工艺,再结晶织构弱化,获得接近随机的取向织构。综合分析表明,异步一次轧制有利于提高材料的深冲性能。Abstract: The effect of asymmetric rolling on microstructure,texture evolution,and formability of SUS430 ferritic stainless steel sheet has been investigated by using X-ray diffraction(XRD) and optical microscopy.The results showed that grains could be appropriately refined by asynchronous rolling,but the grain sizedistribution was not uniform.Texture evolution analysis indicated that uniform and complete γ fiber texture along thickness could be obtained after one-step rolling,but texture intensity is weak.However,applying two-step asynchronous rolling technology,recrystallization texture with nearly random orientation was achieved after double annealing processes.A comprehensive analysis further indicated that one-step rolling technology was beneficial to the performance improvement.
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Key words:
- ferritic stainless steel /
- asymmetric rolling /
- formability /
- texture /
- microstructure
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