新型铁素体不锈钢(三)

• 作 者: M.A.Streicher 石声泰
• 出 处: 腐蚀与防护
• 发表日期: 1980年04期
• 关键词: 铁素体不锈钢 晶间腐蚀 焊接接头 熔化区 填充金属 热影响区 成形过程 环境介质 维特 热循环

四、晶间腐蚀碳化铬和氮化铬:新型铁素体不锈钢对晶间腐蚀敏感性的测定常采用含有焊接接头的试样,焊接时不用填充金属,采用屏蔽钨弧来熔化合金,亦称自熔焊。这种试样接近用焊接成形时材料可能实际经受的热循环。因此在焊接接头组分如焊接金属、熔化区、热影响区或底金属的一处或数处出现晶间腐蚀时,即证明这种材料在对敏化的晶界产生晶间腐蚀的环境介质中可能遭受晶间腐蚀。

Fourth, intergranular corrosion chromium carbide and chromium nitride: new ferritic stainless steel intergranular corrosion sensitivity measurement often used with welded joints of the sample, welding without filling metal, the use of shielded tungsten arc to melt the alloy, also known as Self-welding. This sample is close to the thermal cycling that the material may actually experience when it is formed by welding. Thus intergranular corrosion occurs at one or more points in the weld joint component, such as weld metal, melt zone, heat affected zone, or base metal, as evidenced by the fact that this material is susceptible to intergranular attack on sensitized grain boundaries May suffer from intergranular corrosion.