【Summary】 When casting heat-resistant wear-resistant castings, first of all, we actually have to pay attention to doing a high temperature tempering treatment before using the cementation furnace and its accessories. So far as the temperature is concerned, in a very large extent, we should pay attention to control the temperature above 950 ℃. Then we should pay attention to keeping the heat preservation for 1-2 hours, cooling with the furnace.
With regard to the casting of heat-resistant wear-resistant castings, we should by attention to doing a high temperature tempering treatment before using the box-type furnace or trolley resistance furnace bottom plate and heat-resistant wear-resistant casting furnace plate. So far as the temperature is concerned, we should pay attention to control the temperature above 950 ℃. Then after keeping the heat preservation for 1-2 hours, cooling with the furnace.
On the process, in fact, it is in order to eliminate the inner stress when casting heat-resistant wear-resistant castings. When using the fireback, in a very large extent, it directly ensure the homogeneity of the workpiece placement. Don't mound the workpiece on a local position, or it will cause the fireback lose heat unevenly when it rises in temperature.
Therefore, it will make the fireback out of shape or crack easily. Then, to a large extent, it can prevent the short-circuit which is because of the oxide skin from puncturing hearth plate. It is necessary to contact with the professional companies.
Finally, the use of spreaders and baskets when casting the heat-resistant wear-resistant castings, in fact, it is necessary to pay attention to directly choosing the welding rod whose material is ZG40Gr25Ni20. When quenching its creep behavior will be better. The temperature should be controlled above 950 ℃. And it can increase the service live of heat-resistant wear-resistant castings.