喷焊合金粉末在涂铸工艺上的应用——结合区特征的研究

Application of spray weld alloy powder to coat-cast technology-A study of characteristics of bond region

本文选用镍基、铁基、铜基等喷焊合金粉末应用在涂铸工艺上,使铸件表面形成具有特殊性能的合金层.经电镜、能谱分析,合金层与基体属于冶金结合.结合面较宽,形成犬牙交错.元素之间相互扩散,涂层性能与合金粉末所具有的性能相似.喷焊合金粉末在涂铸工艺上的应用,解决了复杂零件表面合金化问题,应用在新产品上有明显的经济效益.

An alloy layer with special properties will be formed on the surfaces of casts when some kinds of spray alloy powder (nicke1-base, ferrite-base, copper-base, etc.) are appled to the surfaces by coat-cast technology. Results of metallogragh, electron microscope and energy spectrum analyses show that the bonding of alloy layer and base metal is of metallurgical union. The bond zone is broad and of jigsaw pattern. The various elements diffuse in one another and the properties of the coat layer are similar to those of the alloy powder. The application of spray weld alloy powder in coat-cast technology solves the problem of alloying surfaces of complicated or small workpieces and leads to economization, particularly for new products.