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The microstructure and properties of stainless steel 2

  • Author:E-BON
  • Source:E-BON
  • Release on:2017-12-20

2.The duality of carbon in stainless steel
Carbon is one of the main elements of industrial steel. The performance and structure of steel largely depend on the content and distribution of carbon in steel, especially in stainless steel. The influence of carbon in stainless steel on structure is mainly manifested in two aspects. On the one hand, carbon is the element of stabilizing austenite, and the degree of action is very large (about 30 times of nickel). On the other hand, because of the great affinity between carbon and chromium, carbon is formed with chromium series complex carbides. Therefore, from the two aspects of strength and candle resistance, the role of carbon in stainless steel is contradictory.  
Knowing the law of this effect, we can choose different carbon content of stainless steel from different use requirements. E-BON the most excellent stainless steel company, which provide you with Flat Base Stainless Steel Muddler

As the most widely used in industry, the standard provisions of chromium content is at least 0Crl3~4Cr13 of the five grade stainless steel is 12~14%, is the factors of carbon to form chromium carbide and chromium into consideration before deciding, aims to make carbon and chromium combined chromium carbide, chromium content of solid solution the chromium content of the body is not less than 11.7% of the minimum.  
The five grade is due to the different carbon content, strength difference and corrosion resistance of 0Cr13~2Crl3 steel is of good corrosion resistance but the strength was lower than that of 3Crl3 and 4Cr13 steel used for the manufacture of steel structural parts, after two due to the higher carbon content and high strength can be obtained for use in the manufacture of spring tool the requirements of high strength and wear-resistant parts. And in order to overcome 18 - 8 chromium nickel stainless steel intergranular corrosion, carbon steel can be reduced to below 0.03%, or greater than the affinity of chromium and carbon elements (titanium or niobium), the formation of chromium carbide, again when the high hardness and wear resistance as the main requirement, we can the increase in carbon steel and increasing chromium content, so as to meet the needs of the hardness and wear resistance requirements, but also a certain corrosion function, industrial bearings, used as the measuring instrument and blade with stainless steel 9Cr18 and 9Cr17MoVCo steel, the carbon content is as high as 0.85~0.95%, because of their corresponding chromium content to improve, so is the corrosion resistance requirements. 

Generally speaking, the carbon content of stainless steel used in industry is relatively low at present. E-BON the stainless steel specialist, china Stainless steel manufacturers.

Most stainless steels contain 0.1~0.4% of carbon and acid steel is mostly 0.1~0.2%. The carbon content of more than 0.4% stainless steel accounted for only a small part of the total, this is because in most conditions, always with stainless steel corrosion resistance for the main purpose. In addition, the lower carbon content is also due to some technological requirements, such as easy welding and cold deformation.

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