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为了对热力发电装置的输水管和输汽管进行密封,广泛使用铜和镍金属的衬垫。伊佐里生产联合公司用切削加工轧板材制造衬垫,年产量很低。例如,直径107×101mm、厚3mm镍衬垫毛坯重量为1030g,而制成的零件重量为26g。而且为了变形良好,衬垫的材料(镍)的屈服极限不应超过120MPa。铜衬垫的屈服极限不应大于70MPa。但强度极限分别为420MPa 和240MPa。保证这些零件特性的条件需在切削加工后可以均匀化退火。应用粉末冶金法制造衬垫的合理性是非常明显的。在这种情况下,此方法的特点是要以
Copper and nickel metal liners are widely used for sealing the water and steam pipes of thermal power plants. The IZONE joint company manufactures gaskets with machined rolled sheets with very low annual yields. For example, a nickel-backed blank having a diameter of 107 x 101 mm and a thickness of 3 mm weighs 1030 g and a finished part weighs 26 g. And for good deformation, the padding material (nickel) yield limit should not exceed 120MPa. Copper liner yield limit should not exceed 70MPa. But the strength limits are 420MPa and 240MPa respectively. The conditions that ensure the characteristics of these parts need to be homogenized and annealed after cutting. The rationale for producing gaskets using powder metallurgy is very obvious. In this case, this method is characterized by