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近几年来,我国进一步扩大了焊管的生产,增添了不少新的焊管机组,与此同时,也先后从日本、西德和意大利等国引进了一些焊管机组。目前我国现有焊管机组大约有600套以上,其设计能力约400万吨/年,实际年产量为200万吨/年左右,每年直缝焊管机组轧辊的消耗量是很大的。 国内高频直缝焊管及相似的异形管轧辊,目前基本上采用GCr15钢(锻造)制造,此外也有少量采用其他钢种或铸铁制造。在这类轧辊制造厂中,有些由于加工工艺等存在问题,轧辊质量不高,在耐磨性,使用寿命上,与国外同类轧辊相比差距较大。 为了提高高频直缝焊管机组轧辊(及其相似的异型管轧辊)的使用性能和使用寿
In recent years, China has further expanded the production of welded pipes and added many new welded pipe units. In the meantime, some welded pipe units have also been introduced from Japan, West Germany and Italy. At present, there are about 600 sets of existing welded pipe units in China with a design capacity of about 4 million tons / year and an actual annual output of about 2 million tons / year. The annual consumption of straight seam welded pipe unit rolls is very large. Domestic high-frequency straight seam welded pipe and similar shaped tube roll, the current basically used GCr15 steel (forging) manufacturing, in addition to a small amount of other steel or cast iron manufacturing. In this type of roller manufacturing plant, some due to processing problems such as the existence of the quality of the roller is not high, in wear resistance, service life, compared with similar foreign large gap between the rollers. In order to improve the use of long-term high-frequency straight seam welded pipe roll (and its profiled tube roll) performance and service life