2.25Cr-1Mo钢封头拼缝的性能研究

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The bett weld of 2.25 Cr - 1Mo steel h US521 wire and PF200 flux. By hot formation and ead plate was welded by submerged arc welding with normaligation plus tempring heat treatment, weld mechanical properties and tempering embrittement resistance conform to design requirement. Witness weldment testing showed that the fabrication procedure is applicable to product.2.25Cr-1Mo钢封头拼接采用自动焊方法焊接,焊丝和焊剂选用US521S配PF200。封头在热成形后,经正火＋回火恢复材料性能热处理和焊后退火处理,焊缝力学性能和抗回火脆化性能均能满足工程要求。通过见证件的解剖检验,表明该制造工艺可用于产品制造。