在济南第二机床厂翻砂车间里,原来埋怨原料质量不好,因而对提高产品质量没有信心的人,现在心悦诚服地承认自己的看法片面了。因为这个车间在五月份原材料基本没有改变(到25日以后,生铁的含硫量比以前有了降低),但铸件质量却稳步上升了,恢复到了去年上半年实际达到的水平。5月份的废品率由4月份的8.59％降低到5.58％。6月1日至7日,大的和关键性的铸件,没出一件废品。这个车间在1至4月份,铸件报废率平均在11.55％左右,仅3月份报废的铸 In the sand-rolling workshop of the second machine tool factory in Jinan, the original complained that the quality of raw materials is not good, and therefore people who do not have confidence in improving the quality of the product, are now conceited to admit that their views are one-sided. Because the raw materials of this workshop remained basically unchanged in May (after the 25th, the sulfur content of pig iron was lower than before), but the quality of castings has steadily increased and recovered to the level actually achieved in the first half of last year. The scrap rate in May was reduced from 8.59% in April to 5.58%. From June 1st to 7th, large and critical castings produced no scrap. In the workshop from January to April, the casting scrap rate averaged about 11.55%, and only scrapped in March.