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Mo-La合金厚板材的力学性能研究李晶,王林,付静波,刘仁智,卜春阳摘 要:着重研究了La含量0.29%,厚度2.5 mm的Mo-La合金板材在不同退火温度下的室温和高温拉伸性能.结果表明,板材成品退火温度在1 250℃,具有较好的深加工性能.关键词:Mo-La合金;板材;力学性能;......
Mo-La合金棒烧结密度的影响因素浅析杨秦莉,赵虎,庄飞金堆城钼业股份有限公司技术中心摘 要:选取6种Mo-La粉,考察费氏粒度,粒度分布,形貌以及不同烧结温度对Mo-La合金棒烧结密度的影响,结果表明:相同烧结工艺下,随着钼粉费氏粒度的增大,Mo-La合金棒的烧结密度在减小;费氏粒度相同,粒度曲线偏左的钼粉,Mo-La合金棒烧结密度高;颗粒大小均匀的钼粉,Mo-La合金棒烧结密度接近理论密度,而颗粒大小不均匀的钼粉,Mo-La合金棒的烧结相对密度达不到95%.另外对2#和4#钼粉进行不同温度的烧结发现:随着烧结温度的提高,颗粒大小均匀的2#钼粉,其烧结棒的气孔沿着晶界不断消失,烧结达到完全致密化;颗粒不均匀的4#钼粉,其烧结棒密度虽有提高,但是气孔却被包裹在晶粒内部,即使升高温度这种气孔也难排除,因......
Mo-La材料固-液喷雾掺杂过程掺杂物反应机制分析王锦金堆城钼业股份有限公司摘 要:通过对硝酸镧晶体进行差热分析,获得TG,DTG和DSC曲线,进而确定3个温度拐点.在这3个温度下,对硝酸镧进行空气气氛的热分解试验和固-液喷雾掺杂工艺模拟试验,并对其反应产物进行XRD分析.按照Mo O2-50La(NO3)3的化学配比,进行Mo-La材料的固-液喷雾掺杂试验,对掺杂Mo O2进行XRD分析.这3试验结果证明,在传统喷雾掺杂过程中,硝酸镧无论呈晶体形式还是水溶液形式,均只通过脱水反应转变为La(NO3)3.4H2O,而不会发生热分解产生La2O3,NO和/或NO2,掺杂过程产生的氮氧化合物烟气污染是由于硝酸分解所得.并分析了硝酸的来源.关键词:固-液喷雾掺杂工艺;MoO2;硝酸镧;氮氧化合......
掺杂方式对Mo-La合金断裂韧性及掺杂粒子显微结构的影响马宝平金堆城钼业集团有限公司摘 要:分别采用液-固和液-液掺杂方式向钼粉中引入氧化镧,用粉末冶金方法烧结出Mo合金.通过透射电镜和扫描电镜研究了不同掺杂方式制备的Mo-La2O3材料中第二相颗粒的粒度分布,形貌,以及钼合金的断口形貌.试验结果表明液-液掺杂方法有利于细化,分散La2O3;液-液掺杂试样的断裂韧性优于液-固掺杂试样.并通过位错塞积理论讨论了La2O3的粒度分布对钼合金性能的影响.关键词:掺杂;断裂韧性;显微结构;掺杂粒子;Mo-La合金;......
The Strengthening of Cu-15Ni-8Sn Alloy WANG Ming-Pu1,WANG Yan-hui1,HONG Bin1 (1.School of Material Science and Engineering, Central South University, Changsha China) 摘要:The microstructure, property and relation between them of Cu-15Ni-8Sn alloy are studied by means of TEM and the measurement of hardness. The results show that γ '' metastable phase strengthens alloy because of its ordering......
The Technological Improvements of Aluminum Alloy Coloring by Electrolysis LI Nai-jun1 (1.Teachers College, Shenyang University, Shenyang 110015, P. R. China) 摘要:The technological process of coloring golden-tawny on aluminum alloy by electrolysis was improved in this paper. The optimum composition of electrolyte was found, the conditions of deposition and anodic oxidation by electrolysis were......
Microstructure and Performances of Nanocrystalline Zinc-nickel Alloy Coatings LI Guang-yu1,NIU Li-yuan1,JIANG Zhong-hao1,LIAN Jian-she1 (1.The Key Lab of Automobile Materials, Ministry of Education, China, College of Materials Science and Engineering, Jilin University, Nanling Campus, Changchun, 130025, China) 摘要:Nanocrystalline zinc-nickel alloy coatings were deposited from an alkaline......
Alloy 20不锈钢薄板等离子弧焊接工艺研究赵斌,王宾宾,王小华中国船舶重工集团公司第七二五研究所摘 要:对Alloy 20不锈钢薄板进行了等离子弧焊接工艺试验研究.结果表明,采用等离子弧焊接方法,ERCr Ni Mo-3焊材及合理的焊接工艺参数,等离子弧焊接工艺可用于Alloy 20不锈钢薄板的焊接,焊接接头各项性能均能满足要求.关键词:Alloy 20;不锈钢薄板;等离子弧焊接;......
)Abstract:Stainless die with micro-groove and micro-hole have been designed and manufactured, which has been used to study superplastic microforming of 2091Al-Li alloy by means of superplastic forming... micro-rib specimen, behavior of material could be understood well.Key words:superplasticity; microforming; extrusion; 2091Al-Li alloy......
Trans. Nonferrous Met. Soc. China 22(2012) s656-s660 Microforming of superplastic 5083 aluminum alloy Md. Abu Mowazzem HOSSAIN1, Sung-Tae HONG1, Kyu-Yeol PARK1, Young-Sang NA2 1. School of Mechanical...: The mechanical behavior of superplastic 5083 aluminum alloy during microforming process was investigated by finite element analysis. A micro V-groove die was modeled to analyze the effects of forming......