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稀土薄壁铸铁管在内蒙古自治区赤峰市钻机厂试制成功,9月4日通过鉴定。用连续铸造方法成型,稀土复合物处理的灰铁管,管环抗破损强度达40公斤/毫米~2,较未经稀土处理的管环强度提高9～10公斤/毫米~2,试水压力达30公斤/厘米~2,已生产出80余吨铸铁管用于输送煤气及给水,按照往常的滚杆推下运输方式,摔裂破损率由原来的20～30%减少到3～4%。使用单位感到满意。
Rare-earth thin-walled cast iron pipe in Chifeng City, Inner Mongolia Rig successfully trial trial, September 4 passed the appraisal. The gray iron pipe which is molded by the continuous casting method and treated by the rare earth compound has the breaking strength of the pipe ring of 40 kg / mm2, which is 9-10 kg / mm2 higher than that of the pipe without the rare earth treatment, Up to 30 kg / cm ~ 2, more than 80 tons of cast iron pipes have been produced for conveying gas and water supply. According to the usual roll bar push-down transportation mode, the breaking rate of breakage is reduced from 20% to 30% to 3% to 4%. Satisfied with the use of units.