Welding the insulation of the lathe
There is no need for heat preservation. Parts easy to collapse is related to materials processing, and tool grinding cutting 刅, related to the choice of brand of the cutting tools are also associated with quality of carbide itself. Is cemented carbide in the machining of the cutting tools, the cutting temperature is extremely high (at this point do not collapse), sometimes suddenly add night cooling liquid cooling segment (at this time will not collapse), it is hard alloy features: high temperature resistant, wear resistant, low expansion coefficient, etc, so welding is no need to heat preservation.
The key to the welding tool is the problem of heating technique, not heat preservation.
For welding high carbon steel and other steel. Usually preheat to 400 degrees before high carbon steel welding. Preheat the other steel to about 300 degrees. It depends. There are other factors to consider. Heat insulation for 1-2 hours is better after welding. I don't know what kind of welding method you're using. Is the gas welding? It's something else.
