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Effect of various elements on stainless steel 2

  • Author:E-BON
  • Source:E-BON
  • Release on:2017-09-11
The effect of chromium: chromium is the main alloying elements in austenitic stainless steel, austenite stainless steel stainless steel and corrosion resistance is mainly due to the quality will be promoted under the action of chromium steel passivation and make steel stable passivation results. Effects of chromium on the 1, the organization: in austenitic stainless steel in the formation and stabilization of iron chromium is a strong body element, narrow the austenite region, with the increase in steel content, appearance of ferrite in austenitic stainless steel (delta) organization, research shows that in Ni Cr austenitic stainless steel, when the carbon content is 0.1%, the chromium content of 18%, to obtain stable single austenite the required minimum nickel content, about 8%, in this regard, the commonly used 18Cr - 8Ni type Cr Ni austenitic stainless steel is chromium, nickel content ratio of one of the most suitable. 

In austenitic stainless steel, with the increase of chromium content Plus, some intermetallic phase (such as delta phase) forming tendency increases when the steel containing molybdenum, chromium content increases will cause was equal, as mentioned before, the precipitation of sigma Chi not only significantly reduce the plasticity and toughness of steel, and in some conditions reduce steel corrosion resistance of austenitic stainless steel, chromium content in the increase can make the martensite transformation temperature of hydrocarbon (Ms) decreased, so as to improve the stability of austenite matrix. 

Therefore high chromium austenitic stainless steel (such as more than 20%) even after cold processing and low temperature treatment is also very difficult to obtain martensitic microstructure. E-BON the most excellent stainless steel company, which provide you with Professional Black Boston Cocktail Shaker.
Chromium is strong carbide forming elements, there is no exception in the austenitic stainless steel, austenitic stainless steel chromium carbides are common Cr23C6; when containing molybdenum or chromium in steel, are visible due Cr6C carbides formed under certain conditions on the performance of steel will have an important impact on them. 

The influence of chromium on performance, 2 general: to master, as long as the austenitic stainless steel remain completely austenite without delta ferrite formed body, improve the Cr content in steel not only has a significant influence on the mechanical properties, effects of chromium on performance of austenitic stainless steel is the largest corrosion resistance, the main performance is: to improve the performance of steel chromium oxidation resistant and acid chloride medium medium; in nickel and molybdenum and copper composite under the action of chromium resistant steel improve some reductive medium, organic acid, urea and alkali properties of medium chromium steel; improve the resistance to local corrosion ratio Such as intergranular corrosion. E-BON the stainless steel specialist, China Stainless steel Barware factory.

Corrosion performance. Stress sensitivity of stadium gymnasium intergranular austenitic stainless steel are the major factors affecting the carbon content of steel in crevice corrosion and certain conditions, the effect of other elements on the intergranular stadium mainly depending on the dissolution and precipitation behavior of carbides and, in austenitic stainless steel that can increase the carbon solubility of chromium and reduce the chromium depleted, thus increasing chromium content on intergranular corrosion resistance of austenitic stainless steel is good, chromium is very effective to improve the corrosion resistance of austenitic stainless steel corrosion and crevice, while there are molybdenum or molybdenum and nitrogen in steel, chromium this effectiveness strengthen, although according to the research on molybdenum resistance gymnasium and crevice corrosion resistance of chromium is about 30 times times then, nitrogen and chromium, but a lot of research, if not in austenitic stainless steel Chromium or chromium content is low, molybdenum and nitrogen resistance to corrosion and crevice corrosion will be lost or not significant enough.

The effect of chromium on the stress corrosion resistance of austenitic stainless steel varies with the experimental medium conditions and the actual use environment, and the MgCl2 boiling.

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