1979 The 45Mn2 steel ball successfully developed won the major scientific and technological achievements of the Ministry of Electric Power Industry and the Golden Dragon Award for outstanding new products of the State Economic Commission. Then, in view of the uneven wear problems of steel balls such as out-of-round, pits, etc. in operation, a raceway quenching tank process that does not consume energy is designed to solve the defects such as out-of-round, pits, etc. The average volume hardness (AVH) of the steel ball reaches 53HRC. The consumption of grinding balls per ton is reduced from 1 1,000 g when ordinary steel balls are used to about1000g, saving electricity by 6-8kwh.
1979 put forward the technical standard of 45Mn2 forged quenched steel balls, which was issued by Gansu Provincial Bureau of Standards with the document 198 1 on July 20 10, and the release number was Q/DL-0 1.
1984 prototype products of low manganese (42Mn2, 45Mn2RE) ball mill steel lining and crusher hammer head were appraised in 1986 by more than 30 experts, including Tsinghua University, invited by Gansu Electric Power Industry Bureau. The certificate number was Gan Dian Ke Jian Zi No.86005, and the prototype steel lining 1985 was in 803 Power Plant on 287/4. Its relative service life is 3.22 times that of high manganese steel liner installed and operated on the same machine. China's invention patent number is 87 100948 X, low manganese wear-resistant steel product and its technology, which won the highest international gold medal certificate and trophy at the second Edison World Invention Expo in 1998.
From 65438 to 0988, in the comprehensive test of the selection and evaluation of grinding balls of national ball mills sponsored by China Mechanical Engineering Society, the comparative performance index was excellent. Its wear resistance exceeds that of high chromium steel balls, and its cost is only half of that of high chromium steel balls. China Mechanical Engineering Society awarded certificates and medals for outstanding new products. The invention patent number of China is 85 109476.7. 1990 won the gold medal in the second international patent, new product and new technology exposition, which is the only gold medal in Gansu 2 1 project.