在线材生产中,不管是从轧机的数量上,还是从产量或需要量上,我国都堪称世界线材大国,但因产品质量和品种规格不能满足需要,每年仍不得不从国外进口,花费了大量外汇。我国线材与国外线材相比主要差距是:尺寸公差大、机械性能不均匀、表面质量差和盘重小等。 In the production of wire rod, no matter from the number of rolling mills, or from the output or demand, our country is the world’s largest wire country, but because of product quality and variety specifications can not meet the needs, each year still have to import from abroad, spent A lot of foreign exchange. Compared with the foreign wire rod in our country, the main difference is: large dimensional tolerance, uneven mechanical properties, poor surface quality and small plate weight.