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Metallurgy, Central South University, Changsha 410083, China; 2. Laiwu Iron & Steel Group Powder Metallurgy Co. Ltd, Laiwu 271105, China) Abstract: PM low alloy steel samples were prepared by die...): 334-337. [5] Skena C, Prucher T, Czarnek R, et al. Hardenability characteristics of P/M alloy steels[J]. International Journal of Powder Metallurgy, 1997, 33(7): 25-35. [6] Chagnon F, Trudel Y......
无污染的优良特性. 关键词:氧化钙;钛合金;精密铸造;陶瓷型芯;烧结模型 中图分类号:TG146.2,TG249.5 文献标志码:A Initial-sintering stage properties of calcium oxide ceramic cores during titanium alloy precision casting... with the real sintering temperature. The experiment also verifies that strength is enough for titanium casting and its low activity satisfies the surface requirement of titanium alloy without any contamination......
compensation method proposed, the optimized wax pattern die profile can be established. For a A356 alloy blade, substantial reduction in dimensional and shape tolerances was achieved with the developed die... for enhancing the quality of net-shaped products. Due to the shrinkages of the wax and solidifying alloy material, the geometrical size of the part produced by the investment casting process......
-fluxing ferrous alloy powders were fabricated on Q235 substrate. Based on the uniform design, the distribution of the experimental samples was designed reasonably in the sample space, which greatly...-plasma cladding process is shown in Figure 1. Figure 1 Schematic diagram of micro-plasma cladding process The self-fluxing ferrous alloy powder was used in this experiments, which had a mean volume......
brazing joints of SiC ceramics and Ti alloy by using Ag-Cu-Ti-(Ti+C) as bonding material LIN Guo-biao1, HUANG Ji-hua1, ZHANG Jian-gang1,LIU Hui-yuan1, MAO Jian-ying2, LI Hai-gang2 (1. School... (mass fraction) powder as vacuum non-pressure brazing material, sound brazed joints of SiC ceramics /Ti alloy were acquired at 920℃ for 30min. The joints were investigated by X-ray diffractrometry......
on welding residual stress distribution in a thin-walled 6061 aluminum alloy structure. To obtain sound numerical results, the thermo-mechanical behaviour was simulated using a direct-coupled... for the material described is not available. Table 1 presents partial data of 6061-T6 aluminum alloy. The thermal and mechanical properties of the weld metal and heat-affected zone are the same......
tribometer rubbing against Cu-5%Ag alloy ring. The results demonstrated that 800 °C was the optimum sintering temperature for Cu-graphite-WS2 dual-lubricant composites to obtain the best comprehensive... as lubricants were prepared by hot-pressing method. Electrical sliding wear behaviors of the composites were tested using a block-on-ring tribometer rubbing against Cu-5%Ag alloy ring. The objective......
微观断口具有准解理特征,断口中存在球状孔洞,疲劳条纹和韧窝,并存在二次裂纹.关键词:5A06铝合金;焊接接头;疲劳断口;二次裂纹Fatigue fracture behavior of 5A06 aluminum alloy and its welded jointZHANG Hong-xia, WU Guang-he, YAN Zhi-feng, PEI Fei-fei, LI Jin-yong... antirust aluminum alloy and its welded joints. The fatigue properties, microstructure, fatigue crack propagation character and fatigue fracture were investigated by fatigue test, optical microscopy (OM......
,使涂层表面形成微氧化膜.关键词:高铝铜合金;粉体涂层;超音速等离子;摩擦;磨损Boundary lubrication tribological property of high-aluminium copper alloy coarse powders coating made by supersonic plasma sprayingYANG Xiao-tian1, WANG... and Biological Engineering, Lanzho)Abstract:The high-aluminium copper alloy coarse powders coating was fabricated on 45# steel substrate by supersonic plasma spraying. The friction experiment was carried out......
.随着应力比的增加,疲劳裂纹扩展速率均呈增大趋势.裂纹尖端塑性区内的第二相粒子与基体的不协调塑性变形可促进疲劳裂纹的扩展,影响疲劳裂纹的扩展速率.关键词:高强铝合金;焊接接头;第二相粒子;疲劳裂纹扩展Fatigue crack propagation characteristics of high strength aluminum alloy welded joint used by high... propagation rate of A7N01 aluminum alloy welded joint using fatigue test system. The microstructure of welded joint was analyzed by an optical microscope, and the morphology of fatigue fracture......