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ZG18CrMnSiMoV是我厂参考有关资料,自行配方冶炼而成的用于生产防喷器壳体的材料。防喷器是我厂近几年来的主要产品之一。其工作压力为210公斤/厘米~2或350公斤/厘米~2(试验压力高达420公斤/厘米~2或700公斤/厘米~2),故对铸造质量要求高,不能有裂纹、气孔、夹渣等缺陷。加工后必须进行严格的超声波探伤检查和压力试验。由于防喷器壳体体积大,重达1.8吨,壁厚60～380毫米,铸造应力大,在壳体孔道边缘或转角处容易产生裂纹等铸造缺陷,铸件的成功率很低。我厂曾用结107焊条对裂纹进行补焊,
ZG18CrMnSiMoV is the reference material of our factory, which is made from the smelting of our own formula and used to produce the BOP case. Blowout preventer is one of the main products of our factory in recent years. The working pressure of 210 kg / cm ~ 2 or 350 kg / cm ~ 2 (test pressure up to 420 kg / cm ~ 2 or 700 kg / cm ~ 2), so the casting quality requirements, can not have cracks, pores, clips Slag and other defects. After processing must be strict ultrasonic flaw detection and pressure test. Due to the large volume of the blowout preventer housing, weighing 1.8 tons, wall thickness of 60 to 380 mm, casting stress, easy to produce cracks and other casting defects at the edge or corner of the housing hole, casting success rate is very low. I plant 107 knot welding cracks have been welded,