1) heat-treated before heat treatment equipment should be checked, auxiliary equipment, instrumentation, and whether or not you qualify, the furnace temperature difference is everywhere in the range ( ± 5° C);
2) the furnace should be rinsed, or sand should be free of oil, dirt, mud, and a gold medal, should not be confused.
3) Easy-to-have-sex-warping of the casting should be placed in a dedicated chassis or on the stand, do not agree with the suspended cantilever section;
4) check the casting performance, cast or a cast try stick should be supplied with spare parts, together with furnace processing, in order to truly reflect the casting performance.
5) should be in the keep-warm period at any time, and check calibration furnace temperature throughout to prevent local high temperature or derelict graves.
In the event of a power failure) 6 short time after not being able to recover, you should keep in the casting in the oven quickly hardened, and return to normal, and then replace furnace, heat and heat-treated.
7) In nitro-hardened too much salt in the slot, and casting should be immediately after the hardened rinse with hot water to remove residual salt to prevent corrosion.
8) found that after quenching casting deformation, should immediately be corrected;
9) you want to limitation the part after quenching, should be carried out within 0.5 H limitation;
10) if the performance is not found after heat treatment, heat-treatment can be repeated, but no more than 2 times.
11) should be based on casting structure form factor, size, and the alloy features such as heat treatment process heat.
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