The working vacuum should be selected according to the material and heating temperature. First, the working vacuum required for no oxidation heating should be met, and then the surface brightness, degassing and evaporation of alloy elements should be comprehensively considered. The working vacuum of commonly used materials is recommended as follows:
真空热处理 Vacuum heat treatment | 推荐工作真空度Recommended working vacuum | 真空钎焊 Vacuum brazing | 推荐工作真空度 Recommended working vacuum |
钢(合金工具钢、结构钢、轴承钢) Steel (alloy tool steel, structural steel, bearing steel) | 1-10-1Pa | 铝制产品 Aluminum products | 10-3Pa |
含Cr、Ni、Si等合金钢 Alloy steel containing Cr, Ni, Si, etc | 10Pa | 铜基产品 Copper base products | 10-1-10-2Pa |
不锈钢,高温合金,铁基、镍基、钴基 Stainless steel, high-temperature alloy, iron, nickel, cobalt base | 10-2-10-3Pa | 镍基产品Nickel-based products | 10-2-10-3Pa |
钛合金 Titanium alloy | 10-3Pa | 多元合金产品Multicomponent alloy product | 10-1-10-3Pa |
铜合金 Copper alloy | 133-13.3Pa | 高速钢回火 High speed steel Tempering | 1.3-10-2 |