排序方式: 共有108条查询结果,搜索用时 21 毫秒
1.
By laser multi-layer cladding using a pulsed Nd-YAG irradiation the thickness of the cladding zone Mgbased alloys(ZM2 and ZM5)can reach about 1.0mm.The microstructure of the substrate and the classing zone was studied using optical microscope.scanning electron microscopy(SEM),X-ray diffractometry(XRD0and micro hardness analysis.It is observed that constituent of ZM5 alloy is δ Mg17Al12,that of ZM2 alloy is α MgZn Mg9Ce.That of cladding layer ZM2 alloy(L-ZM2)is Mg Mg2 Zn11 MgCe;while that of the cladding layer ZM5 alloy(LZM5)is Mg Mg32(Al,Zn)49,The hardness of the cladding area can be increased to values above HV127.Very fine uniform microstructure and the produced new phases of nanometer/sub-micrometer order were obtained.Now,many repaired Mg-based alloy components have been passed by flying test in outside field. 相似文献
2.
3.
4.
5.
6.
7.
着重探讨长输燃气管线的电化学腐蚀问题,就阴极保护恒电位仪在天然气长输管线保护的应用作了介绍,并对实际运行中遇到的问题进行了探讨和分析。 相似文献
8.
9.
10.