Qingdao Hexin Machinery Co., Ltd. has many years of experience in heat-resistant steel production, specializing in the production of various heat-resistant steels. The following is a brief introduction to the heat-resistant steel cast trays. Based on our many years of production experience, combined with the customer's use, we propose improvements to the structure, production process, and on-site working conditions of the heat-resistant steel tray, which can increase the service life of the heat-resistant steel tray and reduce the customer's production cost.
    The heat-resistant steel casting tray is produced by the precision casting process, and is mostly used in carburizing furnaces, box furnaces, annealing furnaces, trolley resistance furnaces, nitriding furnaces and other heat treatment furnaces. The heat-resistant steel casting trays are suitable for multiple heat treatment production processes. , such as: carburizing, carbonitriding, nitrocarburizing, quenching, normalizing and annealing. Cooling methods include oil cooling, water cooling, protective atmosphere air cooling and salt bath isothermal cooling.
The main materials of heat-resistant just-casting trays produced by Hexin Machinery are 1.4849, 1.4848, HT, etc., with specifications ranging from several hundred to several thousand millimeters. The following is a brief list of several heat-resistant steel casting trays:
The use temperature of the heat-resistant just-casting tray is different in each process, and the impact on the use of the heat-resistant steel tray is also different. The use of heat-resistant steel pans can be paid attention to from the following basic points (for reference only):
     1. The heat-resistant just-casting material tray needs to be tempered at a high temperature before use, the temperature is controlled at above 950 °C, the temperature is kept for 1-2 hours, and it is cooled with the furnace, mainly to eliminate the internal stress in the casting process and increase the use of the material tray. life.
     2. During the use of box furnaces, trolley resistance furnace bottom plates, etc., it should ensure that the workpieces are placed evenly, and do not accumulate the workpieces in a local position of a heat-resistant steel casting tray, which will cause the furnace to be damaged during the heating process. In the process of heat dissipation, the plate is not uniform, which is easy to cause deformation and cracking of the furnace plate, so as to prevent the short circuit of the resistance wire caused by the oxide skin from penetrating the furnace bottom plate.
     3. For heat-resistant just-cast material pan, if local cracks are found during use, ZG40Gr25Ni20 electrode can be used for welding.