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, the surface-interface morphologies, phase components and line scan and plane scan of chromized interface were analyzed with SEM, EDS and XRD respectively, and the changes of structure and elements.... Key words: Cr12MoV steel; chromizing treatment; line scan; plane scan Cr12MoV钢是一种高碳高铬的冷作模具钢[1],具有较好的韧性,耐磨性及淬透性,在冷冲,冷压等形状复杂模具方面有较为广泛的应用[2].经锻造的钢组织以铁素体和马氏体为主,弥散分布着能提高硬度和耐磨性能的Cr3C2,在最后冷凝过程中容易产生网状共熔......
field, and the equilibrium equation of high pressure inner water exosmosis was established based on physical theory. Then, the plane strain theory was used to solve the problem of elasticity... words:high pressure hydraulic tunnel; inner water exosmosis; physical theory; seepage factor; stress redistribution; plane strain theory......
beam basically obeys plane hypothesis. Moreover, in order to avoid the early brittle failure of the stitching beam, the wood knot should not be put on the tensile side of beam. Key words: timber stitching beam; bending bearing capacity; plane hypothesis 拼合是中国传统木作营造中梁栿制作的一种方法,是指以碎拼整或以简单形状拼复杂形状,从而达到以小料替代整材大木的目的.拼合梁历史悠久,在中国传统木构建筑中,拼合做法多见于梁架构件和檩条构件,三架梁,五架梁等梁架构件在承载力或刚度不足时,通常采用梁-角背或梁-随梁枋的拼合做法进行加强,而檩条构件在......
TEM Studies on Martensitic Transformation in Fe-Cr-W-V-C Alloy伍尚华,刘禹门摘 要:<正> The martensitic transformation inFe-Cr-W-V-C alloy has been investigated byTEM.The habit plane of martensite is near (252)f,the austenite/martensite orientation relationship isKurdjumov-Sachs’.In the martensite plates thereare twins on (112)[ 1]b,dislocation tangles......
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. [10] YANG Qing-bo, WANG Xin-zhu, LI Xu, DENG Zan-hui, JIA Zhi-hong, ZHANG Zhi-qing, HUANG Guang-jie, LIU Qing. Hot deformation behavior and microstructure of AA2195 alloy under plane strain... and Materials Transactions A, 2009, 40(4): 982-990. [14] 潘红波, 唐 荻, 胡水平, 王潇潇. 平面应变压缩技术的研究[J]. 锻压技术, 2008, 33(2): 75-79. PAN Hong-bo, TANG Di, HU Shui-ping, WANG Xiao-xiao. Study on plane strain physical......
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; turn of crystal plane; Received: 2000-03-30 深冷处理称为超低温处理, 它是指在-130 ℃以下对材料进行处理的方法, 是常规冷处理的一种延伸. 一般来说, 深冷技术不仅用于高速钢, 轴承钢, 工模具钢的处理, 以提高材料的耐磨性和韧性 [1,2,3] ; 同时深冷处理还能对铝合......
Rotation of Main Slip Plane {110} and Variation of Strain Hardening Rate in Cold Rolling Deformation of BCC Steel Z.M.Yu1,G.Y.Li1 (1.Material Forming, IMP;2. Material Physics, FYS*;3. The Royal Institute of Technology (KTH) 100 44 Stockholm Sweden) 摘要: 1. IntroductionTo improve the formability of sheet steels for car-body panels, large-strain deformation has been applied to cold rolling......