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The toughness may be well improved by postheat treatment which is large in energy consumption and long in working period. 銲後熱処理可以較好地改善銲接接頭的靭性,但存在耗能大、工時長等問題。
Keywords transformation column;preheat;welding heat input;interpass temperature control;postheat(remove argon);symmetrical welding; 轉換柱;預熱;銲接熱輸入;層(道)間溫度控制;後熱(去氫);對稱施銲;