求翻译：本文针对双真空超纯净熔炼的含镍量不同的轴承钢，主要运用光学显微镜、扫描电子显微镜、XRD衍射仪等手段，分析不同含镍量试验钢的组织变化；运用洛氏硬度计、拉伸试验机、冲击试验机对其力学性能进行分析测试；并采用描电子显微镜和能谱分析仪，分别对拉伸和冲击试验钢断口形貌进行分析。是什么意思？

Dual vacuum ultra pure melting nickel content of bearing steel, the main use of optical microscopy, scanning electron microscopy, xrd diffraction means, analysis of the organizational changes of different nickel content of test steel; the use of Rockwell hardness, tensile testing machine, impact tes

This document double-vacuum ultra-pure nickel smelleding capacity of different bearing steel, primarily using optical microscope, scanning electron microscopy, XRD diffraction, analysis of different tools such as nickel steel is tested the organizational change; the use of Rockwell hardness testing

This article in view of the double vacuum ultra pure smelting including the nickel quantity different bearing steel, mainly utilizes methods and so on light microscope, scanning electron microscope, XRD diffractometer, the analysis differently experiments the steel including the nickel quantity the

This for double vacuum super pure melting of with nickel volume different of bearing steel, main using optical microscope, and scan electronic microscope, and XRD diffraction instrument, means, analysis different with nickel volume test steel of organization changes; using Rockwell hardness meter, a