钼基高温合金的真空扩散焊连接方法

• Format: Patent
• Language: Chinese
• Published: 01.04.2022
• Subjects: CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR; PERFORMING OPERATIONS; SOLDERING OR UNSOLDERING; TRANSPORTING; WELDING; WORKING BY LASER BEAM

本发明提供一种钼基高温合金的真空扩散焊连接方法，包括：将Ni箔放入零件待焊处，对零件进行装配；将装配后的零件装入真空钎焊炉中，并对零件加压至第一压力开始抽真空，直至真空度≤1×10-4Pa；将真空钎焊炉加热至第一温度，对零件加压至第二压力；在压力保持在第二压力时，将真空钎焊炉加热至第二温度；保温预设时长；保温结束后停止对真空钎焊炉加热，随炉冷却至600℃，将压力按1MPa/min的减压速率减至0MPa，零件空冷至20℃。可以有效减少焊缝内气孔和裂纹缺陷。 The invention provides a vacuum diffusion welding connection method for molybdenum-based superalloy. The method comprises the following steps: putting Ni foil into to-be-welded positions of parts, andassembling the parts; putting the assembled parts into a vacuum brazing furnace, and pressurizing the parts to first pressure to start vacuumizing until the vacuum degree is lower than or equal to 1* 10 <-4> Pa; heating the vacuum brazing furnace to a first temperature and pressurizing the parts to second pressure; heating the vacuum brazing furnace to a second temperature while maintaining thesecond pressure; performing heat insulation for preset time; stopping heating the vacuum brazing furnace after heat insulation, performing furnace cooling to 600 DEG C, reducing pressure to 0 MPa a