Why do steel castings with gas cutting risers break?

The first thing to look at is the material. The more cast steel with high carbon content or high alloy content, the bigger the riser and the easier it is to crack. According to the material, size and shape, determine the preheating temperature and cut the riser, or directly anneal and cut. In addition, heat preservation should be paid attention to after cutting, and heat treatment should be carried out in the furnace in time. In the process design, we must pay attention to the safety margin reserved for shrinkage porosity. If shrinkage porosity enters the casting, it will be very cracked and extremely difficult to repair!

Pure hands!