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近年来,汽车产业内部要求应用的材料需要具有高表观硬度、高淬透性以及提高力学性能。这些往往-矛盾的要求迫使寻找开发新材料,这些新材料必须不增大后续热处理的费用,能够提供较高的烧结态表观硬度及良好的静态/动态力学性能。传统的烧结硬化材料虽然提供适用的表观硬度,但力学性能与烧结体密度却不高。本文将用许多文献资料证明,一系列烧结硬化材料既有好的压缩性、高表观硬度,又能增高力学性能。将着重讨论这些材料在汽车(包括发动机与变速器)的,诸如齿轮、凸轮及链轮中的应用。这些零件当前是用压制-烧结-热处理工艺,或者是用常规的铸锻材料-切削加工制造的。还将讨论用高温烧结来强化生产工艺。
In recent years, the materials required within the automotive industry require high apparent hardness, high hardenability, and improved mechanical properties. These often-contradictory demands have forced the search for new materials that must not increase the cost of subsequent heat treatment and provide high apparent hardness in the sintered state and good static / dynamic mechanical properties. Although conventional sintered hardened materials provide suitable apparent hardness, mechanical properties and sintered density are not high. This article will use a lot of literature to prove that a series of sintered hardened materials have good compressibility, high apparent hardness, but also increase the mechanical properties. Applications of these materials in automobiles, including engines and transmissions, such as gears, cams and sprockets, will be highlighted. These parts are currently manufactured by press-sinter-heat treatment or by conventional cast and forged materials. Will also discuss the use of high-temperature sintering to strengthen the production process.