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本文对以00Cr12Ni9Cu2TiNb马氏体时效不锈钢为基,单一或复合加入微量铍和稀土元素的各炉钢进行了物理—机械性能和化学性能的测定,从而选定00Cr12Ni9Cu2TiNbBeRE钢为一种综合性能优良的新型耐蚀高弹性合金。通过超高压电镜、X—射线衍射仪、电子探针等对上述两种钢的组织结构进行了较深入地研究。两种钢的显微组织均为板条马氏体。00Cr12Ni9Cu2TiNb钢的析出相为棒状NiTi;而00Cr12Ni9Cu2TiNbBeRE钢的析出相为棒状NiTi及球状NiBe,且其时效激活能为155.5kJ/mol,比00Cr12Ni9Cu2TiNb钢要高6.3kJ/mol。
In this paper, the 00Cr12Ni9Cu2TiNb martensitic stainless steel-based, single or a combination of trace amounts of beryllium and rare earth elements of the furnace were measured physical-mechanical properties and chemical properties, thus selected 00Cr12Ni9Cu2TiNbBeRE steel as a comprehensive excellent new performance High corrosion-resistant alloy. The structure of the above two kinds of steels has been studied deeply by means of EHV electron microscope, X-ray diffraction and electron probe. The microstructure of both steels is lath martensite. The precipitated phase of 00Cr12Ni9Cu2TiNb steel is rod-shaped NiTi, while the precipitated phase of 00Cr12Ni9Cu2TiNbBeRE steel is NiTi and spherical NiBe. The activation energy of aging is 155.5kJ / mol, which is 6.3kJ / mol higher than that of 00Cr12Ni9Cu2TiNb steel.