Purpose

1. Prevents oxidation during heating
   — Minimizes the reaction of metal with oxygen at elevated temperatures.

2. Shields surfaces from air to prevent oxide formation
   — Forms a barrier (e.g. through flux, gas, or vacuum) to maintain clean metal surfaces.

3. Promotes the flow of brazing filler metal
   — Helps the molten filler metal wet and spread across the base metals for a strong joint.
   
   
   目的

4. 防止加热时氧化
   — 减少金属在高温下与氧气反应。

5. 隔绝空气，防止表面生成氧化物
   — 通过使用助焊剂、保护气体或真空环境形成屏障，保持金属表面的清洁。

6. 促进钎料的流动
   — 帮助熔融的钎料在母材表面润湿并均匀铺展，从而形成牢固的连接。