316L不銹鋼冷變形加工硬化機制及組織特征

宋仁伯; 項建英; 侯東坡

doi:10.13374/j.issn1001-053x.2013.01.010

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316L不銹鋼冷變形加工硬化機制及組織特征

doi: 10.13374/j.issn1001-053x.2013.01.010

1. 北京科技大學材料科學與工程學院, 北京 100083;
2. 中鐵物資集團中南有限公司, 武漢 43070

詳細信息

通訊作者:
宋仁伯,E-mail:songrb@mater.ustb.edu.cn

中圖分類號: TG142.71
計量
- 文章訪問數: 223
- HTML全文瀏覽量: 32
- PDF下載量: 25
- 被引次數: 0
出版歷程
- 收稿日期: 2011-11-11

Microstructure characteristics and work-hardening mechanism of 316L austenitic stainless steel during cold deformation

1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. China Railway Materials Group Central-south Co. Ltd, Wuhan 430070, China

摘要

摘要: 通過對316L不銹鋼的不同變形量的壓縮試驗,對其冷變形特性進行了研究.利用修正的Ludwik模型對流變應力數據進行非線性擬合,獲得了316L不銹鋼的真應力應變模型和加工硬化模型.試驗結果表明:修正的Luiwik模型能較好的反映316L不銹鋼真應力與應變關系;根據流變應力的變化規律,316L不銹鋼冷變形流變應力可分為三個階段,分別為真應變小于0.02的強加工硬化階段,真應變在0.02與0.29之間的穩加工硬化階段,以及真應變大于0.29的弱加工硬化階段.電子顯微技術研究表明316L不銹鋼三個不同的變形階段,其加工硬化機制、微觀組織特征有所不同.
- 不銹鋼 /
- 冷加工 /
- 硬化 /
- 微觀組織 /
- 硬度
Abstract: The cold deformation characteristics of 316L stainless steel were investigated by compression testing with different deformations. The true stress-strain model and work-hardening model were obtained by fitting the test data with a modified Ludwik model. It is found that the modified Ludwik model can formulate the relationship between stress and strain of the stainless steel. The flow stress of the stainless steel during cold deformation is divided into three stages:the high work-hardening stage, the stable work-hardening stage, and the low work-hardening stage corresponding to the deformation less than 0.02, between 0.02 and 0.29, and greater than 0.29, respectively. Electron microscopy results indicate that the work-hardening mechanism and microstructure characteristics of the stainless steel are different in the three stages.
- stainless steel /
- cold working /
- hardening /
- microstructure /
- hardness