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发明公开
CN106323978A 一种核电用奥氏体不锈钢管金相组织的检验方法 有权 转让

一种核电用奥氏体不锈钢管金相组织的检验方法
摘要：
本发明公开了一种核电用奥氏体不锈钢管金相组织的检验方法，该方法为：一、在核电用奥氏体不锈钢管上机械加工出金相观测平面后研磨；二、将金相观测平面置于抛光机上进行机械抛光；三、电解腐蚀，电解液为HNO3、HCL和H2O按照10:1:(2～5)的体积比混合的混合溶液；四、在显微镜下进行α相金相组织的观测和测量；五、继续电解腐蚀5s～10s；六、置于显微镜下进行奥氏体晶粒的观测。本发明采用由HNO3、HCL和H2O混合而成的电解溶液对不锈钢表面进行电解腐蚀，通过合理选择电解腐蚀电压，避免了对铁素体相的严重侵蚀影响，又能同时清晰得到奥氏体晶粒和铁素体相的组织结构层次。
摘要（英）：

The invention discloses a test method of metallographic structure of austenitic stainless steel pipe for nuclear power. It is as follows: I. produce the metallographic observation plane by machining on the austenitic stainless steel pipe for nuclear power and grinding; II. conduct mechanical polishing on the plane by a polisher; III. Carry out electrolytic corrosion with the electrolyte the mixture of HNO3 and HCL and H2O [volume ratio, 10:1: (2 - 5)]; IV. Observe and measure the alpha phase of metallographic structure under the microscope; V. Maintain the electrolytic corrosion for another 5s-10s; VI. Observe the austenite grains under the microscope. The invention adopts the mixture of HNO3 and HCL and H2O as the electrolyte in the electrolytic corrosion. Together with the proper voltage, the phase of ferrite would not be affected by heavy corrosion while organization structures of ferrite and austenitic grains with clear levels can be obtained.

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