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首页> 外文期刊>材料と環境 >Corrosion Resistance of Dissimilar Welds between Ferritic Stainless Steel with High Corrosion Resistance and Austenitic Stainless Steels
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Corrosion Resistance of Dissimilar Welds between Ferritic Stainless Steel with High Corrosion Resistance and Austenitic Stainless Steels

机译：具有高耐腐蚀性和奥氏体不锈钢铁素体不锈钢之间不同焊缝的耐腐蚀性

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摘要

Intergranular corrosion susceptibilities of the dissimilar welds between SUS 444 which is ferritic stainless steel with high corrosion resistance and austenitic stainless steels were investigated. Judging from the 10 percent oxalic acid etch test results, there are some cases where the welded joints between SUS 444 and SUS 304, SUS 316 have high intergranular corrosion susceptibilities, while the welded joints between SUS 444 and SUS 316 L have low intergranular corrosion susceptibilities. Intergranular corrosion susceptibility of the welded joints between SUS 444 and SUS 316 decreases when over 30 percent martensite phase precipitated with the high penetration ratio of SUS 316. Intergranular corrosion of the dissimilar welds between high purity SUS 444 and austenitic stainless steels is caused by the formation of chromium depleted zone. The countermeasures for the intergranular corrosion of the dissimilar welds are that the martensite phase with high solubility of carbon and nitrogen is forced to precipitate by increasing the penetration ratio of SUS 316 or SUS 316 L is applied for austenitic stainless steel.
机译：研究了SUS 444之间不同焊缝的晶间腐蚀敏感性，其是具有高耐腐蚀性和奥氏体不锈钢的铁素体不锈钢。从10％的草酸蚀刻测试结果判断，存在一些情况，其中SUS 444和SUS 304之间的焊接接头，SUS 316具有高的晶间腐蚀敏感性，而SUS 444和SUS 316 L之间的焊接接头具有低的晶间腐蚀敏感性。当SUS 444和SUS 316之间的焊接接头的晶体腐蚀易感性降低，当用SUS 316的高穿透比沉淀出超过30％的马氏体相时，高纯度SUS 444和奥氏体不锈钢之间的异种焊接的晶间腐蚀是由地层引起的铬耗尽区。对不同焊缝的晶间腐蚀的对策是通过增加SUS 316或SUS 316 L的渗透比来沉淀出具有高溶解性的马氏体相，以施加奥氏体不锈钢。

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