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hardness in the plate section were discussed. The results showed that the newly upsetting-flanging process revealed higher flange height and better lip accuracy than the conventional hole-flanging process, and the results between FEM simulations and experiments showed good agreement. Besides, the hardness of the plate around the flange part increases due to the work hardening after the upsetting......
℃), excellent stiffness (600 GPa), high hardness, good chemical durability, high electrical conductivity (4.6×106 Ω-1·m-1) [8], and the chemistry compatibility with O′-Sialon ceramics. As a result... High temperature oxidation behavior of electroconductive TiN/O′-Sialon ceramics prepared from high titania slag-based mixture JIANG Tao1, 2, XUE Xiang-xin1, 2, LI Zhe-fu1, 2, DUAN Pei-ning1, 2 1......
Trans. Nonferrous Met. Soc. China 22(2012) 2057-2065 Tribological behaviour of AZ71E alloy at high temperatures HUANG Wei-jiu1, 2, LIN Qiang2, LIU Cheng-long2 1. Key Laboratory of Manufacture... at high temperatures under dry sliding conditions using a pin-on-disc wear testing machine. The results indicate that the wear rate increases with the increase of applied load and sliding distance......
,当时效时间在2~12h时,合金的导电率差异不大,基本处于72%~75%IACS.对比发现,当时效温度为475 ℃,时间为3 h时,连续挤压Cu-0.88Cr-0.14Zr合金杆材的综合性能优异,确定其为峰时效制度. 图6 连续挤压Cu-0.88Cr-0.14Zr合金杆材在不同时效制度下的硬度与导电率变化曲线 Fig. 6 Hardness... of continuous extrusion on the microstructure and mechanical properties of a CuCrZr alloy[J]. Materials Science and Engineering A, 2013, 582: 219-224. [3] SUN L X, TAO N R, LU K. A high strength and high......
Scratch behavior of high speed steels for hot rollsLi Zhou1,2,3), Dale Sun2), Changsheng Liu3), Chunguang Li3), and Lisong Yao2) 1) Shougang Research Institute of Technology, Beijing 100041, China 2...">The scratch behaviors of two high speed steels (HSS) for hot rolls were studied by a Micro-combi Tester, and the emphasis was placed on researching the relations between the microstructure and the scratch......
; high-temperature oxidation resistance 1 Introduction Transition metal nitride coatings, such as TiN and CrN, were applied as hard coatings because of their high hardness, excellent wear resistance... high hardness as well as good wear resistance due to their low friction coefficients. CrN coatings also show excellent corrosion resistance under severe environmental conditions [8] and good oxidation......
Improvement of a High Velocity Compaction Technique for Iron PowderDil Faraz KHAN1,2,Haiqing YIN1,Zahid USMAN3,Matiullah KHAN4,2,Xianjie YUAN1,Wenhao WANG1,Xuanhui QU11. Laboratory of Particulate...="ChDivSummary" name="ChDivSummary">Water atomized pure iron powder was compacted by high velocity compaction(HVC) with and without upper relaxation assist(URA) device.The influence of URA device on green......
?C in air for 48 and 360 h, respectively,and the effects of high temperature oxidation on the flexural strength and hardness of Ti3AlC2 were investigated. The microstructure, grain size and phase...Effects of High Temperature Oxidation on Mechanical Properties of Ti3AlC2Xichao Li1,2,Lili Zheng1,Yuhai Qian1,Jingjun Xu1,Meishuan Li11. Shenyang National Laboratory for Materials Science, Institute......
1.5. Key words: directional solidification; aluminum alloy; microstructure; tensile strength; hardness 1 Introduction The elements that constitute an alloy material and the microstructure... that may occur during material processing and obtain materials with high performance, it is critical to consider their microstructures. Using scientific data regarding microstructures and the results......
磁控溅射Al-Mg-B薄膜成分优化曲文超1,2,吴爱民1,吴占玲1,白亦真2,姜辛0(1.辽宁省大连市大连理工大学机械工程与材料能源学部材料科学与工程学院2.辽宁省大连市大连理工大学三束材料改性教育部重点实验室)摘 要:采用多靶磁控共溅射技术,利用高纯度Al,Mg和B单质靶材为溅射源,室温下在单晶Si(100)表面上成功制备了低摩擦系数的非晶态Al-Mg-B硬质薄膜.通过改变Al/Mg混合靶体积配比及靶材溅射功率来调控薄膜成分,最终制备的Al-Mg-B薄膜成分接近AlMgB14相的元素成分比,其Vickers硬......
