First of all, the operator should be assessed according to the requirements of "three fixed" (fixed person, fixed machine, fixed type of work). After passing the examination, the operator will be issued the operation certificate, and then the operation can be carried out.
Heat treatment is to put the forgings in a certain medium heating, heat preservation and cooling, by changing the metal material surface or internal organization to control its performance of the process method.
Heat treatment is the middle process of forging manufacturing process, it is restricted by the process before and after, requires the operator must understand the forging before and after heat treatment process, that is, the process flow.
Heat treatment is carried out at high temperature, the equipment is more complex, process control often requires a variety of instruments, therefore, the operator must comply with the process discipline, the correct implementation of heat treatment process.
There are many and complicated factors affecting the quality of heat-treatment products. The quality of heat-treatment products depends not only on equipment and control means, but also on the responsibility and technical level of operators. After long-term production practice, especially to the middle and senior workers, the operator should not only be able to according to the technical requirements of forging drawings, reasonable selection of equipment, fixture and determine the relevant heat treatment process parameters, but also to ensure the use and maintenance of heat treatment equipment and temperature measurement and temperature control device; Can choose quenching medium and forging cooling mode reasonably and accurately; Can judge furnace temperature and control cooling time by visual fire color.
Electricity, salt, oil and gas used in heat treatment are prone to electric shock, poisoning, explosion and other accidents, so safety production is extremely important.
Before heat treatment operation, it is necessary to read the process documents and check, that is, check whether the shape, size, quantity, material and technical requirements of the forgings are consistent with the process card. Strictly according to the "three" (that is, according to the drawing, according to the process, according to the operation rules) for operation.
In heat treatment operation, the "three inspection" system, namely self-inspection, mutual inspection and special inspection, should be strictly implemented. Batch production should also do the first piece inspection and sampling in the middle.
After heat treatment, clean used fixtures, stack steam in accordance with set management requirements, clean equipment and work site.