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OCT 23 2012

Alloy steel to produce and Development

Manganese steel

Alloy steel, more than a hundred years of history. Industrial alloy steel more about the second half of the 19th century. Was due to increasing steel production and use, machinery manufacturing need to be addressed steel Machining problem, the 1868 British Maxi Te (RFMushet) invented the ingredients for a self-hardening steel of 2.5% Mn-7% W the cutting speed was increased to 5 m / min. With the development of the commercial and transportation in the United States in 1870 with the construction of the bridge span of 158.5 m chromium steel (1.5 ~ 2.0% Cr) in Mississippi; processing components difficult, later, some industrial countries to switch to a nickel steel (3.5% Ni) the construction of large-span bridges. At the same time, some countries also nickel steel used to build warships. With the development of the engineering required to accelerate the mechanical rotation speed, high carbon chromium bearing steel in Western Europe in 1901. 1910 Development 18W-4Cr-1V type of high-speed tool steel, to further improve the cutting speed to 30 m / min. Seen the advent and development of alloy steel, is adapted to the requirements of the development of social productive forces, in particular, need to be separated and machinery manufacturing, transportation, and military industries.
1920s, is to promote the use of electric arc furnace steelmaking method for mass production of alloy steel to create favorable conditions. The development of the chemical industry and power industry, but also to promote the alloy steel varieties expansion, so stainless and heat resisting steels appeared during this period. 1920 the Maurer (E.Maurer), a German invention 18-8 resistant stainless steel, Fe-Cr-Al resistance wire, appeared in the U.S. in 1929, Germany in 1939, in the power industry began to use austenitic resistance hot steel. After World War II to the 1960s, the era of the development of high-strength steel and ultra-high-strength steel, due to the needs of the aviation industry and the development of rocket technology, there are a lot of high-strength steel and ultra-high-strength steel, new steel grades, such as precipitation hardening high strength stainless steel and a variety of low-alloy high-strength steel and other representative steels.carbon manganese steel  60 years later, many of the new metallurgical technology, especially the refining technology is commonly used alloy steel began to develop in the direction of high purity, high-precision and ultra-low carbon maraging steel, ultra-pure ferrite stainless steel and other steels. International thousands alloy steel number, tens of thousands of specifications, alloy steel production accounts for about 10% of the total production of steel, is the extensive use of metallic materials in the national economic construction and national defense construction.