Normalizing heat treatment, quenching, tempering, annealing temperature and holding time control

1 heat treatment temperature, heat preservation are important basis for instrument temperature. In the heat treatment process, must check the temperature of the furnace and the temperature of the workpiece and the instrument shows. If there is a problem to inform electrician to check repair instrumentation. 2 heat treatment industry to do three frequently: regular temperature, frequently look at material temperature, regular adjustment control, ensure that each part of the furnace temperature uniformity, maintain positive pressure in the furnace. 3 normalizing, quenching, tempering, annealing temperature and furnace integrated and selected in practice strict control, according to the requirement of the instruction is to ensure that the first condition of heat treatment quality. Organizations because of low heating temperature, phase shift will happen; And the heating temperature is too high, can make the austenitic grain size grew up too much, cause problems for cooling phase the organization change. So must be strictly in accordance with the requirements of the work instruction, do not arbitrarily set high set lower. 4 normalizing, quenching, tempering, annealing holding time should also be strictly controlled. Because enough time will make the organization transformation is not completely, and the time too, and can make the organization grow up, make bad performance. 5 general heat treatment of heat preservation phase started in the past, should have a mean temperature stage. Mean temperature began to begins with instrument temperature of heat preservation temperature calculation; When all the surface of the workpiece temperature in furnace to heat preservation temperature, mean temperature is over, start heat preservation.