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铸件缺陷的修补方法有多种,主要有浸渍、堵塞、金属喷镀、液体金属熔补、气焊电焊法等。对铝合金铸件上次要部位的孔眼类缺陷及穿透性细微气孔、裂纹等;或铸件虽有气密或水密要求,但承受的压力不高,且渗漏不太严重时,可用浸渍法修补。工艺过程 (1)检查渗漏情况:按铸件技术要求,用气压或水压法检查铸件渗漏部位,做好标记。 (2)浸渗剂选用:采用机械工业部上海材料研究所监制的7-2312单组份环氧胶粘剂。 (3)浸渗剂稀释:该浸渗剂在常温下为粘稠性胶液,在水浴或烘箱内60～80℃时即能稀释,不需搅拌可直接使用。 (4)铸件表面处理:用砂纸打磨铸件的待浸渍部位,然后用丙酮擦净两遍,晾干待用。
Casting defects repair methods are many, there are dipping, plugging, metal plating, liquid metal welding, gas welding welding method. On the aluminum alloy castings on the secondary parts of the eye hole defects and penetrating micro-pores, cracks, etc .; or castings, although airtight or watertight requirements, but the pressure is not high, and the leakage is not serious, you can dip method repair. Process (1) check the leakage: According to the technical requirements of the casting, with pressure or water pressure to check the castings seepage site, make a mark. (2) infiltration agent selection: The Ministry of Machinery Industry, Shanghai Institute of Materials 7-2312 single-component epoxy adhesive. (3) infiltrant dilution: The infiltrating agent at room temperature for the viscous glue, in a water bath or oven can be diluted at 60 ~ 80 ℃, without stirring can be used directly. (4) castings surface treatment: Sanding the castings to be impregnated parts, and then wipe with acetone two times, to be ready for use.