排序方式: 共有7条查询结果,搜索用时 15 毫秒
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6月下旬,由二十冶冶金设备制造安装总公司制造的连铸方坯翻转移动冷床在天津钢厂第二炼钢厂一次试车成功,并正式投入使用,为天津钢厂增效益发挥了重要作用。 这台投资1795万元的16m方坯冷床是天津钢 相似文献
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汽车变速箱轴断裂分析 总被引:1,自引:0,他引:1
通过对断口、金相组织及显微硬度进行分析,结果表明:轴的断裂是高频退火工艺水当所致。 相似文献
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微波场下渗硼层的制备与研究 总被引:3,自引:0,他引:3
以35碳钢为基体研究了微波场下材料渗明层的制备及渗硼层的组织和相结构,并与常规加热模式进行比较,发现微波场下的渗硼层的形成、相结构等与常规有较大差异,且相同条件下渗层要厚得多。渗层的快速形成主要是硼原子在渗层中快速扩散的结果。 相似文献
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王玉伏 《武汉理工大学学报(材料科学英文版)》1998,(3)
The AlN whiskers were composed by the Al_2O_3-C system with some CaF_2 and NH_4Cl addition under the condition of the carbothermal reduction treatment of 1450 C and 2h as well as nitrogenous atmosphere. The composed AlN whiskers were analysed and the results show that some whiskers morphology such as plate cwoed, brached corrugated were observed and the ratios of length to diameter change greatly. The composed whiskers are not even. some surface quality is not high. TEM analyse show that the fiber axes are normal to[0112] and [1101]. The mechanism of the growth of the whiskers is supposed to be VLS(Vapor-Liquid-Solid) 相似文献
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