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The first batch of large-scale nuclear power copper stainless steel sealed ch
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Recently, the first batch of two sets of nuclear power in sealed rooms and sealed chamber cover plants in forging forging forging hydraulic press workshop successful. Batch of forgings is currently the largest copper producing martensitic precipitation hardening stainless steel forgings, forged its success, marking these products can replace imported to achieve localization. The largest domestic steel ingot production of about 2t so, in the forging process is easy to crack scrapped as a result. China This product is double the maximum tonnage of about 17 tons of steel ingot, forging billet weighs about 11 tons of the best in the country's nuclear power forging forging such a large size is the first time. In order to ensure a successful forging of China in the second half double from 2009 began to study the thermal processing of steel materials and process performance, by contrast, and high-temperature thermoplastic, and other performance tests, work out a reasonable process, strict control of the heating rate, heating temperature , holding time and temperature to ensure uniformity of ingot and forging temperature of each fire times. After 8 days before and after the forged, three copper ingots four martensitic precipitation hardening stainless steel forgings successful, marked the double nuclear power capacity with a special stainless steel forgings and on a new level.