Main process elements for heat treatment of large steel castings

The heat treatment of large-scale cast steel slag packs and slag pots is generally composed of heating, heat preservation and cooling. The determination of their process parameters is based on the assurance of product quality and energy conservation.

1. Heating and heating is the most energy-intensive process in the heat treatment process. The main technical elements in the heating process are choosing the proper heating method, heating rate and loading method. The large steel casting manufacturer Great Wall Cast Steel has also done a lot of work in heat treatment related castings to ensure that each product is fully heat treated.

2. The austenitizing heat preservation temperature of the heat-preserving cast steel shall be selected according to the chemical composition of the cast steel and the required performance. The determination of the heat treatment holding time of steel castings should consider two aspects: singularity is consistent with the temperature of the casting surface and the core; and second, the organization is uniform, so the residence time of the insulation depends on the thermal conductivity of the cast steel, and the wall thickness of the casting is usually Is the main basis for estimating the holding time.

3. After cooling, the steel castings can be cooled at different rates to complete the phase transformation of the steel to obtain the required metallurgical structure and achieve the specified performance indicators. In general, increasing the cooling rate is conducive to obtaining a good state of organization and refinement of the salute, thereby improving the performance of the steel, but it is easy to cause the casting to produce a large stress and lead to deformation or cracking of the casting with complex structure. Casting steel heat treatment cooling media commonly used air, oil, water, brine and molten salt.

Cast steel manufacturer chaeng(Great Wall Cast Steel) 11 years of professional production of large-scale 1T-150T steel castings, involving 8 large-scale steel castings, the main products are: slag cans, ladle, upper and lower beams, left and right columns, mining machinery rack , Forging machine body, hinge beam, wheel belt, marine machinery castings and so on. If you are interested in our steel casting products, please click online customer service consulting or call.