| 摘要 |
PURPOSE:To perform carburizing and brazing at the same instant and to braze and join a part to be subjected to carburizing and the other part with good dimensional accuracy at a low cost by setting a brazing material between the two parts and heating the same in a vacuum carburizing furnace. CONSTITUTION:A part 1 such as gear to be subjected to carburizing and a part 2 such as boss which is to be combined and joined to said part and is not subjected to carburizing are assembled via a brazing material 3. A carburizing preventive agent is coated, if necessary, on the part which is not subjected to carburizing and the brazing part. The assembly is put into a vacuum carburizing furnace and is heated to melt the brazing material, thereby starting brazing. The assembly is then heated to the carburizing temp. and is soaked at said temp. A carburizing gas is introduced into the furnace to carburize the parts. The parts are subjected to proper hardening and tempering after cooling. The carburizing stage and the joining stage are accomplished simultaneously according to the above-mentioned method, by which the operation is simplified. |
