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在压缩机制造实践中,广泛采用并不缺乏的34XH1M和34XH3M低合金钢制造钎焊工作叶轮,该两种材料在调质热处理后极限强度接近于100公斤力/厘米2,冲击韧性为6～7公斤力·米/厘米2。在钎焊前,形成工作叶轮闭式通道的零件表面最后加工至7～8级光洁度。为保证通道的表面光洁度,高温钎焊时必须采用可靠的保护介质,分析表明,因为采用氩气保护比较昂贵,而采用氢气,又由于焊接工作叶轮时使用的炉子工作室容积较大而比较危险,所以在真空中钎焊低合金钢叶轮比较适宜。采用高温钎料真空钎焊34XH1M和34XH3M钢的接头试验表明,其塑性较低〔1〕。
In the compressor manufacturing practice, widely used and not lacking 34XH1M and 34XH3M low alloy steel brazing working impeller, the two materials after quenching and tempering the ultimate strength close to 100 kgf / cm2, impact toughness of 6 ~ 7 kgf m / cm 2. Before brazing, the surface of the part that forms the closed path of the working impeller is finally machined to a finish of 7 to 8 grades. In order to ensure the surface finish of the tunnels, a reliable protective medium must be used for brazing at high temperature. Analysis shows that hydrogen is more expensive due to the use of argon and more dangerous due to the larger chamber size of the furnace used for welding working impellers , So brazing low alloy steel impeller in vacuum is more appropriate. The use of high temperature brazing vacuum brazing 34XH1M and 34XH3M steel joint test showed that its plasticity is low [1].