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首页> 外国专利> A nuclear reactor comprising a reactor vessel and structural members made of an austenitic stainless steel having superior resistance to irradiation-induced segregation

A nuclear reactor comprising a reactor vessel and structural members made of an austenitic stainless steel having superior resistance to irradiation-induced segregation

机译：一种核反应堆，包括反应堆容器和由奥氏体不锈钢制成的结构部件，该部件对辐射诱导的偏析具有优异的抵抗力

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A nuclear reactor having structural members made of austenitic stainless steel which is corrosion-resistant in an environment of neutron irradiation, and can suppress stress corrosion cracking and embrittlement. At least one additive selected from the group consisting of Ti more than 0.2% by weight but not more than 0.6%, Zr more than 0.2% but not more than 1.14%, Hf more than 0.2% but not more than 2.24%, V more than 0.2% but not more than 0.64%, Nb more than 0.5% but not more than 1.17% and Ta more than 0.5% but not more than 2.27% is added to austenitic stainless steel containing Cr, Ni and so on, and said at least one exists in a solid-solution state. In addition, the steel has a wholly austenitic structure substantially free of carbide. In order to maintain the irradiation-induced segregation prevention effected by the addition element, the C content is limited to 0.01 to 0.008%, and the N content is limited to 0.001 to 0.0%. The irradiation-induced segregation, of the constituent elements, such as Cr and Ni, occurring in a grain boundary under irradiation, can be prevented, and the deterioration of the corrosion resistance of the material, as well as the embrittlement, can be prevented.
机译：一种具有由奥氏体不锈钢制成的结构构件的核反应堆，该构件在中子辐照环境下具有耐腐蚀性能，并且可以抑制应力腐蚀开裂和脆化。选自Ti大于0.2重量％但不大于0.6％，Zr大于0.2％但不大于1.14％，Hf大于0.2％但不大于2.24％，V以上的添加剂中的至少一种。在含有Cr，Ni等的奥氏体系不锈钢中，添加0.2％以上0.64％以下的Nb 0.5％以上1.17％以下的Ta以及0.5％以上2.27％以下的Ta。至少一种以固溶状态存在。另外，钢具有基本上不含碳化物的全奥氏体组织。为了维持由添加元素实现的防止辐照偏析，将C含量限制为0.01〜0.008％，将N含量限制为0.001〜0.0％。可以防止在辐照下发生在晶界中的诸如Cr和Ni的组成元素的辐照引起的偏析，并且可以防止材料的耐腐蚀性和脆性的劣化。

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