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be increased and the dry friction is used between pressure die, bending die and tube in actual production. Key words: thin-walled tube; tube NC bending; friction; cross section quality 1 Introduction... bending technologies[1]. In the forming process, cracking and wrinkling can be avoided, but the cross section distortion and the wall thinning are inevitable. Cracking and wrinkling should be avoided......
Plastic deformation behavior of Mg97Zn1Y2 extruded alloys K. HAGIHARA1, A. KINOSHITA1, Y. SUGINO1, M. YAMASAKI2, Y. KAWAMURA2, H.Y. YASUDA1, Y. UMAKOSHI3 1. Division of Materials...; 1 Introduction Aggressive usage of magnesium wrought alloys for industrial applications, especially in automotive field, is very promising......
was also discussed. Key words: Cu2S/T-ZnOw heterostructure; photocatalytic property; Cu2S nanoparticle 1 Introduction A great deal of efforts have been devoted in recent years to developing... and Cu2S/T-ZnOw nanocomposites fabricated with different PVP concentrations were measured, respectively. As shown in Fig. 1, the diffraction peaks at 2θ=31.88°, 34.41°, 36.26°, 47.52° and 56.62......
for the transverse tensile anisotropy. Key words: third generation single crystal superalloy; DD9; transverse tensile properties; anisotropy; fracture surface 1 Introduction Nickel-based single crystal... slab and the transverse specimen is shown in Fig. 1. Three kinds of seeds were used. The longitudinal orientations of all the seeds were [001], and the transverse orientations of the seeds are [100......
DOI:10.19476/j.ysxb.1004.0609.2019.09.01 七十年辉煌历程 新时代砥砺前行-- 中国有色金属工业发展与展望 贾明星1, 2 (1. 中国有色金属工业协会,北京100814；2. 中国有色金属学会,北京100814) 摘 要:总结了新中国成立70周年以来我国有色金属工业从无到有,从小到大,由弱到强的艰难发展历程和取得的辉煌成就,探讨了我国建立现代有...成了从无到有,从小到大,由弱到强的历史性跨越,取得了有目共睹的伟大成就和辉煌业绩,实现了许多深层次,根本性的伟大变革.在这个历史发展的关键时刻,我们更需要静下心来,认真回顾有色金属工业发展壮大的光辉历程,仔细总结几代有色人努力奋斗的宝贵经验,不忘初心,牢记使命,把我国有色金属工业推向更好地满足人民新需求,支持国家新发展,适应科技新变化的高质量发展新阶段. 1 新中国成立70年以来我国有......
; 1 Introduction High strength zinc-based alloys generally comprising substantially large quantities of Al (＞8%) and 1%-3% Cu have been established as a potential material system for use in a variety of engineering applications encountering wear[1-3......
Dependence of characteristics of LaB6 films on DC magnetron sputtering power XU Jing(徐 静)1, 2, MIN Guang-hui(闵光辉)1, HU Li-jie(胡立杰)1, ZHAO Xiao-hua(赵晓华)1, YU Hua-shun(于化顺)1 1. School of Materials...; 1......
; 1 Introduction The friction and wear in automobile.... There is no scuffing up to 1 900 N for the cases of TiN and DLC. The DLC coating represents the lowest value of friction among all of the coatings. Fig.5 Time to scuffing failures with different coated piston rings......
) nanocomposite coating was prepared from a nickel sulfate bath by co-electrodeposition of Ni and SiC nanoparticles in an average size of 30 nm. The oxidation at 1 000 ℃ shows that the Ni-6.0%SiC... ________________________________________________________________________________ 1 Introduction The composite electrodeposition technique is a low-cost and low-temperature method suitable for producing metal......
surface is plain, and the fiber/matrix interfaces become very unclear after calcination at 1 600 ℃ due to intense interfacial reactions. The composite with a precoating shows tough fracture surface with distinct fiber pull-outs, and the fiber/matrix interfaces are still clear after calcination at 1 600 ℃. It is the appropriate precoating process that contributes to the good interfacial microstructures......
