论文部分内容阅读
苏联从1922年到1982年的六十年间,铸件产量由0.7百万吨/年增加到25.2百万吨/年。目前苏联铸件的产量占世界总产量的30%;按人口平均计算的铸件产量已接近100kg,超过世界平均水平的3倍。在其生产的铸件中,球墨铸铁件、可锻铸铁件和铸钢件的产量约占总产量的30%,相当于工业发达国家这三种铸件的总产量。砂型铸造中粘土砂型生产铸件仍占80%左右。但近几年来,造型、制芯已广泛地采用新的工艺和设备,如:流态自硬砂、冷硬砂、塑性自硬砂CO_2自硬砂等。这些工艺的应用,使铸件的尺寸精度提高、表面质量改善。
In the 60 years from 1922 to 1982 in the Soviet Union, the production of castings increased from 0.7 million tons / year to 25.2 million tons / year. At present, the output of the Soviet Union’s castings accounts for 30% of the world’s total output; the output of castings, calculated on the average of the population, has reached nearly 100kg, more than three times the world average. In its production of castings, ductile iron, malleable iron and steel production accounts for about 30% of the total output, equivalent to industrialized countries, the three castings of the total output. Sand casting Clay sand castings still account for about 80%. However, in recent years, modeling, making core has been widely used new technology and equipment, such as: flow of self-hardening sand, chilled sand, plastic self-hardening sand CO_2 self-hardening sand. The application of these processes, so that the dimensional accuracy of castings improve the surface quality.