1) heat treatment should be checked before the heat treatment equipment, auxiliary equipment, instrumentation is qualified and normal throughout the furnace temperature difference is within the specified range (± 5 ° C);

2) Replacing the blast furnace blowing sand or washing, should be free of oil, dirt, mud, alloy grades should not be confused;

3) Shape Traits prone to warping castings should be placed on the a dedicated chassis or bracket does not agree on a vacant part of the cantilever;

4) Check the casting performance single cast or attached to cast test bars with the parts furnace processing, casting to truly reflect performance;

5) during the insulation should be checked at any time, correcting the furnace temperature throughout to prevent local high temperature or burnt;

6) in a short period of time can not be restored after power, casting in insulation should be quickly released quenching, etc. back to normal, and then installed furnace, warm and heat-treated;

7) in the nitrate bath hardened castings should be quenched immediately rinse with hot water to eliminate residual salts to prevent corrosion;

8) found the castings after quenching deformation should be corrected immediately;
9) Part to the aging treatment should be within 0.5h after quenching to aging treatment;

10) If, after the heat treatment found substandard performance, and may be repeated heat treatment, but the number should not exceed 2 times;

11) should be based on the shape, size, alloy characteristics of the casting structure to develop a heat treatment process for heat treatment.



Other News:
United Nations special envoy at Syria initiative ceasefire both let the other
A few points need to pay attention to the heat treatment operation technology
Large forging process crack defects
U.S. budget deficit for four consecutive years break trillion influence
The official Korean maritime police for the shooting of the Chinese fishermen
How timely processing of stainless steel linear bearings running vibration probl
Impact surface on polished finish basic reasons
The old woman let a mutual slaughter bizarre merits shocked Japan