Deformation and Failure of Laser Coat under Impact Loadswith Multishocks

In applying impact loads with multishocks to perform shock experiments for laser cladded cobalt-base and nickel-base alloy coats on the surface of mild carbon steel or austenitic stainless steel, it is found that, under an impact force that is 11%-43% of the static yield limit of the material, micro-plastic deformation is generated both in the coat and upper part of the base. Repeated trials will cause cumulated macro-plastic deformation. After a total of 250,000 impacts, relative deformation rates of 2.2% and 8.9% result in the coat and base, respectively. Moreover, there is a rigidification phenomenon both in the coat and upper part of the base. When the coat covers the entire base, under impact loads with multishocks, the final stress is less than that when the base is only partly covered, and the life is longer.There is intense deformative rigidification and material floating effect on the lower part of the edge of the covering coat. Meanwhile, cracks are likely to occur and spread in this part.     

混凝土的腐蚀与防腐蚀

混凝土的耐久性问题越来越引起关注,而腐蚀是影响混凝土耐久性的主要因素,本文主要讨论混凝土的腐蚀和防腐蚀。     

食品机械选材与防腐蚀的研究

食品机械用于食品的加工，这就决定了机械工程材料在选择和使用时的特点，合理的选材和防腐措施在保证食品卫生，降低设备成本，提高企业的市场竞争方面起着极其重要的作用．     

Superb nanocrystalline alloys for plating

With high rigidity and antiwear performance,nanocrystalline metals and their alloys can find wide applications in surface protection.However, the existence of grain boundaries often leads to erosive micro-batteries which accelerate the process of corrosion.Therefore, it has already become a key issue for surface engineering researchers to find nano materials with higher lubricating, anticorrosion and antiwear capacities.     

危险废物焚烧中烟气净化装置的防腐蚀研究

我们通常指的三废是固体废物、废水和废气,而危险废物是三废具有更大的危害性、难治理性和长期性的废物,它会污染土壤、水体、大气和环境卫生,从而对人体的呼吸系统、消化系统、心血管系统、肺组织和生殖泌尿系统等造成极大的损伤周此近年来危险废物的处置在我国受到了越来越多的关注和重视。本文针对危险废物焚烧中烟气净化装置的腐蚀问题,深入研究了烟气净化装置的防腐蚀技术,具有一定的参考价值。     

煤矿井架防腐宜使用热喷涂技术

矿区井架是矿山采矿的主要配套设备之一,由于环境恶劣,腐蚀状况非常严重,传统的防腐蚀处理已不适应新的环境需要,近年来采用Ac铝合金复合涂层处理,效果更好。     

新型漆酚钛螯合高聚物防腐蚀涂料中试研究概况

生漆是我国特产,年产量为3000吨,占世界总产量的80%以上。7000年来人们一直把它作为优良的涂料,素有“涂料之王”的美称。生漆具有优良的耐腐蚀、耐热和超耐久性。生漆的缺点是:较严重的过敏毒性,漆膜干燥必须在特定的温湿度条件,干燥慢,施工周期长,粘度大,难以施工,对金属的附着力差,耐碱性差。     

深圳地铁钢筋混凝土结构中钢筋的防腐蚀初探

该文主要对深圳地铁钢筋混凝土结构中的钢筋腐蚀进行探讨，提出了保护钢筋的技术措施。     

论化工仪表的腐蚀问题

化工生产过程中的强腐蚀介质给化工测量仪表的应用带来了许多困难,本文就此概述了化工仪表的腐性情况,并由此着重分析了防腐性的应对措施.     

石油管材设备基础与防腐蚀技术

石油管材是石油勘探开发的重要材料.通过介绍我国石油管材运输概况及其存在的问题,探讨了石油管材运输的组成和设备原理.最后提出了几种石油管材防腐措施方案.