| Study on improving properties of welded joints of 400 MPa ultra fine grained steel by mechanical surface hardening |
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| 作者姓名： | 赵洪运 韩飞 夏龙 刘雪云 |
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| 作者单位： | College of Material Engineering and College of Automobile Engineering Harbin Institute of Technology，Weihai，264209，College of Material Engineering and College of Automobile Engineering，Harbin Institute of Technology，Weihai，264209，College of Material Engineering and College of Automobile Engineering，Harbin Institute of Technology，Weihai，264209，College of Material Engineering and College of Automobile Engineering，Harbin Institute of Technology，Weihai，264209 |
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| 基金项目： | TheworkwassupportedbyHighTechnologyDevelopmentProgramofChina(863)(No.2001AA332020). |
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| 摘 要： | 0IntroductionOn the premise almost changeless primary materialconstitutions,no increase of primary material cost,and nodecrease of other properties,ultra fine grained steels aregained by extreme refining on grain through the control ofsmelting process and rolling technique.Ultra fine grainedsteels can have double yield strength than traditional mate-rials,hence they have higher cost performance and wideapplication prospect[1].In the practical application of ultrafine grained steels,they often …
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