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发明公开
CN109338246A 一种含铜铌钴高耐蚀不锈钢及其加工与热处理方法 无效 - 撤回

一种含铜铌钴高耐蚀不锈钢及其加工与热处理方法
摘要：
一种含铜铌钴高耐蚀不锈钢及其加工与热处理方法，合金元素质量百分比为：C≤0.08，Ni＝11.0～15.0，Cr＝18.0～20.0，Mo＝3.0～4.0，Nb≤0.61，Cu＝0.2～0.8，Co＝0.1～0.5，Mn≤2.0，Si≤1.0，P≤0.035，S≤0.030，其中7.73×(C-0.01)≤Nb≤7.73×C，余量为Fe。经热变形开坯和冷变形，NbC破碎、弥散，高温固溶处理后晶粒粗化。通氧条件下80℃含5×10-6F-的0.5mol/L的H2SO4电解液中腐蚀电流密度为11.7～13.1μA/cm2，与经表面涂层的不锈钢双极板材料相当。具有低硬度和高延伸特点，利于双极板流道的成型。
摘要（英）：

The invention discloses copper niobium cobalt-contained high-corrosion-resistance stainless steel and a processing and heat treatment method thereof. An alloy comprises the following elements in percentage by mass: C not more than 0.08, 11.0-15.0 of Ni, 18.0-20.0 of Cr, 3.0-4.0 of Mo, Nb not more than 0.61, 0.2-0.8 of Cu, 0.1-0.5 of Co, Mn not more than 2.0, Si not more than 1.0, P not more than 0.035, S not more than 0.030, and the balance of Fe, wherein Nb is not more than 7.73*C and not less than 7.73*(C-0.01). Through thermal deformation cogging and cold deformation, NbC is crushed and dispersed; and after high-temperature solid solution treatment, grains are thickened. Under the oxygen introducing condition, the corrosion current density in 0.5 mol/L of H2SO4 electrolyte containing 5*10-6F6 at 80 DEG C is 11.7-13.1 uA/cm2, and is equivalent to a surface-coated stainless steel bipolar plate material. The stainless steel has the characteristics of low hardness and high ductility, and facilitates molding of a bipolar plate runner.

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