1) Heat treatment should be checked before heat treatment equipment, auxiliary equipment, instrumentation, and other qualified and normal furnace throughout the temperature difference within the specified range (± 5 ° C);
2) in the blast furnace blowing sand or wash should be no oil, dirt, soil, Alloy should not be mixed;
3) shape traits prone to warping of the castings shall be dedicated to the chassis or bracket not agree with vacant part of the cantilever;
4) Check the casting performance of a single cast or attached cast test bars with the parts together with the furnace processing to truly reflect the performance of the casting;
5) should be kept in the insulation during the inspection, calibration chamber throughout the temperature, to prevent local hot or burnt;
6) power after a short period of time can not be restored, the casting of the insulation should be released rapidly quenching, back to normal, stove, warmth and heat treatment carried out;
7) casting too far in the nitrate bath quenching, after quenching immediately with hot water rinse to remove residual salt, to prevent corrosion;
8) found that after quenching the casting distortion should be corrected immediately;
9) to the aging treatment, aging treatment should be conducted within 0.5h after quenching;
10) such as found after heat treatment, substandard performance, reusable heat treatment, but may make no more than two times;
11) should be based on the heat treatment process developed by the casting structure shape, size, alloy heat treatment.
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