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粉末冶金热锻是采用普通粉末冶金方法,将金属或合金粉末制成一定尺寸、形状和重量的予成形坯,经过烧结,然后加热锻造(简称烧结锻造)或者不经烧结而直接加热锻造(简称粉末锻造)成产品形状。粉末冶金热锻工艺吸取了锻造工艺的特点,通过加热锻造的途径,大大提高了粉末冶金制品的密度,从而使粉末冶金制品的性能提高到接近甚至超过同类锻钢的水平,从根本上克服了普通粉末冶金制品由于存在大量的孔隙,而满足不了高强度零件性能要求的缺陷。然而,粉末冶金热锻又不同于普通致密钢的锻造,它保持了粉末冶金工艺的特点。多孔粉末冶金予成形坯,一
Powder metallurgy hot forging is the use of ordinary powder metallurgy method, the metal or alloy powder made of a certain size, shape and weight of the preform, after sintering, and then forging (referred to as sintering forging) or without direct heating forging sintering Powder forging) into product shape. Powder metallurgy hot forging process draws the characteristics of the forging process, by heating forging approach, greatly increased the density of the powder metallurgy products, so that the performance of the powder metallurgy products close to or even exceed the level of the same wrought steel, fundamentally overcome the Ordinary powder metallurgy products due to the existence of a large number of pores, and can not meet the performance requirements of high-strength parts defects. However, powder metallurgy hot forging is different from ordinary forging of compact steel, which maintains the characteristics of powder metallurgy process. Porous powder metallurgy to the preform, a