论文部分内容阅读
提高强化柴油机铝活塞的寿命和可靠性要求研制用于活塞筒体和环槽部位的耐磨涂层和减磨涂层. 柴油机零件上得到耐磨涂层的有效方法之一是热喷涂(电弧喷涂、火焰喷涂和等离子喷涂)和粉末状或丝状耐磨材料堆焊. 因此需要研制能够形成具有高粘附强度和内聚强度,高耐磨性、耐热性以及最佳减磨性能的涂层的热喷涂材料. 为此利用自助熔材料是不可能的,因为在涂料熔化时铝活塞发热温度很高,而广泛采用在铝粉末上化学积沉镍的方法获得的铝镍混合物又因费用和价格高而难以实现,为此在研制铝活塞涂料时要采用在工业上广泛采用的材料.所研制的热喷涂
Increasing the life and reliability of fortified Diesel aluminum pistons requires the development of wear-resistant coatings and anti-wear coatings for piston barrel and ring groove sections.One of the most effective methods for achieving wear-resistant coatings on diesel engine parts is thermal spraying Spray coating, flame spraying and plasma spraying) and powder or filiform wear-resistant material surfacing.Therefore, there is a need to develop a coating that can be formed with high adhesion strength and cohesive strength, high wear resistance, heat resistance and the best anti-wear properties Coating Thermal Spray Materials It is not possible to use self-fluxing materials for this purpose, since aluminum pistons heat up very hotly as the coating melts and aluminum-nickel mixtures obtained by chemical nickel deposition on aluminum powders are widely used Cost and price is high and difficult to achieve, for the development of aluminum piston coating to be used in the industry widely used materials developed by thermal spraying