What factors are related to the stainless steel hemisphere?
The Decisive Role of chromium in stainless steel hemispherical balls: there is only one element that determines the hemispherical nature of stainless steel, which is Chromium. Each stainless steel hemispherical ball contains a certain amount of chromium. So far, there is no stainless steel hemisphere without chromium. The fundamental reason why chromium has become the main element that determines the hemisphere performance of stainless steel is that after chromium is added to the steel ball as an alloy element, the internal contradictory movement is promoted to the aspect that is conducive to resisting corrosion and damage.
duality of carbon in stainless steel hemisphere: Carbon is one of the main elements of industrial steel balls, the performance and microstructure of steel balls are largely determined by the content and distribution of carbon in steel balls, especially in stainless steel hemispheres. The influence of carbon on the structure of stainless steel hemisphere is mainly manifested in two aspects. On the one hand, carbon is an element that stabilizes austenite and has a great effect (About 30 times that of nickel) On the other hand, due to the great affinity of carbon and chromium, it forms with chromium-Series of complex carbides. Therefore, from the two aspects of strength and corrosion resistance, the role of carbon in the stainless steel hemisphere is contradictory.
knowing the law of this influence, we can choose stainless steel hemispheres with different carbon contents from different use requirements. For example, it is widely used in industry, and it is also a minimum stainless steel ball-- 0Crl3 ~ The standard chromium content of the five steel ball numbers of 4Cr13 is set at 12 ~ 14% is determined only after taking into account the factors that carbon and Chromium form chromium carbide. The purpose is that after carbon and chromium are combined into chromium carbide, the chromium content in the solid solution will not be lower by 11. The low chromium content of 7%. And some improvements have been made in process performance.
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