新型模具材料的发展与动向（Development and trend of new mould materials）.docVIP

新型模具材料的发展与动向（Development and trend of new mould materials） Development and trend of mold materials Hong Xia Mu [Abstract] the paper briefly introduces the development status of mold material in yield, variety and technology, and looks forward to the future development. Development of die material, cold working die, hot working die, plastic mould, prospect 1 Preface In order to save raw materials, improve production efficiency and reduce costs, many countries have widely adopted various mold forming technology instead of the traditional cutting process. The mold industry developed countries manufacturing industry develops very fast, since 1980s, many countries in mold manufacturing industry has exceeded the machine tool manufacturing output, mold manufacturing industry has developed into an independent industrial sector. Chinas mold industry in recent years has made rapid development, mold manufacturing output in 1997 exceeded the machine tool manufacturing industry, 2003 China mold import and export volume of $1 billion 706 million, an increase of 11.95% over 2002, the total imports of $1 billion 369 million 300 thousand. 2 development of mould material and steel grade Mold material is mainly die steel, mold steel production in the past 20 years, growth is very fast, ahead of other steel grades. According to a survey of Japans Ministry of statistics, the Japanese steel production increased from 67 thousand and 900 tons in 1978 to 126 thousand and 726 tons in 1997. In 1997, the total output of alloy tool steel in China has been around 150 thousand tons, and the output of die steel has reached the forefront of the world. At present, a large number of countries use concentrated on 10 kinds of universal die steel. The industrial developed countries are listed in the national standard of steel die steel, alloy tool steel in our current national standards for GB/T1299-2000, a total of 37 steel. The development status of the 3 types of die steels in the world is summarized