维普中文期刊产品整合服务
5篇 您的检索式:作者名="J.F.Wang"
    题名 作者 年代 出处 被引量
1查看详情显示文摘J.F.Wang J.K.Feng 0,,02:1
2C_3S-C_(11)A_7·CaF_2-C_2(A,F)系列快凝水泥的凝结特性显示文摘本文对C_3S—C_(11)A_7—CaF_2—C_2(A,F)系列快凝水泥的凝结过程作了研究探讨。除了凝结时间试验之外,水的吸附量、水泥石的水溶离子浓度及其机械强度也被测定,而且采用了x射线衍射分析。 结果表明:快凝水泥的凝结过程既不由它的相混合决定,也不受缓凝剂添加的影响。若同时添加缓凝剂和波特兰水泥,凝结时间会超过两倍,机械强度也可保证。若只添加缓凝剂或只添加波特兰水泥,就不会表现出明显的凝结滞缓。 缓凝剂似乎可加速快凝水泥的水化,但是在很快的初始水化之后,明显的凝结滞缓马上就会跟踵而至。这种凝结延缓可归因于含氟铝酸盐相表面钙矾石壳的快速形成。J.F.Wang 姚绍德 1994国外建材科技1994,15,2:1
3Pore formation during hybrid laser-tungsten inert gas arc welding of magnesium alloy AZ31B-mechanism and remedy显示文摘L.M.Liu G.Song G.L.Liang J.F.Wang 0,,:1
4Review on Hydrogen Embrittlement of Press-hardened Steels for Automotive Applications显示文摘Press-hardened steel(PHS)with an ultimate tensile strength(UTS)of 1500 MPa has been widely used in automotive body-in-white in the last two decades,due to its ultra-high strength and excellent formability that is achieved by hot stamping process.However,the application of PHS with UTS exceeding 1500 MPa in automotive industry could be deferred due to the increased risk of hydrogen embrittlement.To reduce this kind of risk,recent research efforts have been focused on various ways to optimize the microstructure of PHS.The present review intends to summarize these efforts,to highlight present solutions to address hydrogen embrittlement,and to shed light on directions for future improvement.The influence of microstructure on the hydrogen embrittlement of PHS has been discussed in terms of both the steel substrate and the surface condition.The substrate part covers the influence of martensite,carbides,inclusions,and retained austenite,while the surface part covers decarburization and oxidation,pre-coating,and trimming.Z.Wang Q.Lu Z.H.Cao H.Chen M.X.Huang J.F.Wang 2023Acta Metallurgica Sinica(English Letters)2023,36,7:0
5辣椒栽培实用技术指南显示文摘为实现辣椒丰产、优质、高效、安全的生产目标,促进世界辣椒产业发展,本文从辣椒对气候与土壤的要求,到栽培中的品种选择、种子处理、育苗、田间准备、移栽、施肥、覆盖、灌溉和杂草控制,提出了辣椒栽培措施建议。并列举了辣椒生产中的主要病虫害,提出了综合性防治措施。T.Berke L.L.Black N.S.Talekar J.F.Wang P.Gniffke S.K.Green T.C.Wang R.Morris 杜晓华 2007辣椒杂志2007,,3:0
返回顶部 每页显示:
共1页 首页 上一页 第1页 下一页 末页 /1 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费