按最新冶金工艺要求冶炼的优质耐蚀材料,在随后的轧制中材科的耐腐蚀性能往往变坏。譬如,在钢管的生产中,可能因在变形时应用了含碳的润滑脂,而引起钢管表面渗碳。钢管的渗碳表层通常是用化学腐蚀法、内表面喷砂和磨削外表面等方法清除,而中间管和成品管则采用真空热处理除碳。所有这些方法都会造成金属 According to the latest metallurgical process requirements smelting quality corrosion-resistant materials, in the subsequent rolling of the corrosion resistance of materials often deteriorate. For example, in the production of steel pipes, carburizing grease may be applied to the steel pipe surface during deformation. Carburizing steel pipe surface is usually chemical etching, sand blasting and grinding of the inner surface and other methods to clear, and the middle tube and finished tube vacuum heat treatment is used to remove carbon. All of these methods cause metal