أكبر مورد لل 10 سنوات متخصصة في تخصيص أرجل الطاولة الفولاذ المقاوم للصدأ , تزيين تقليم وجدار الشاشة .

The role of alloying element in stainless steel composition

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The role of alloying element in stainless steel composition

May 21, 2019

Generally, pure metals have relatively high plasticity. When other alloying elements are added, the single-phase solid solution also has good plasticity. فمثلا, fe-ni alloy can form continuous solid solution.

ومع ذلك, under the condition of containing other elements, intermetallic compounds insoluble in solid solution or partially soluble in solid solution are formed to reduce the plasticity of the metal, so the plasticity of the alloy is worse than that of pure metal or single-phase solid solution.

· Iron (Fe) : basic metal element of stainless steel;

· Chromium (Cr) : it is the main ferrite forming element, and the combination of chromium and oxygen can generate Cr2O3 passivation film with corrosion resistance. It is one of the basic elements for the corrosion resistance of stainless steel. The increase of chromium content can improve the repair ability of the passivation film of steel.

· Carbon (C) : it is a strong austenite forming element, which can significantly improve the strength of steel. In addition, الكربون له تأثير سلبي على مقاومة التآكل;

· النيكل (ني) : هو الرئيسي عنصر الأوستينيت تشكيل, والتي يمكن أن تبطئ تآكل الصلب ونمو الحبوب عند تسخينها;

· الموليبدينوم (أنت) : وهو عنصر تشكيل كربيد, الذي هو مستقر للغاية ويمكن أن تمنع نمو الحبوب أثناء التسخين الأوستنيتي وتقليل حساسية من الصلب لارتفاع درجة الحرارة. In addition, الموليبدينوم يمكن أن تجعل الفيلم التخميل أكثر إحكاما وشركة, وبالتالي تحسين فعالية المقاومة-CL تآكل الفولاذ المقاوم للصدأ;

· النيوبيوم, التيتانيوم (ملحوظة, Ti) : it is a strong carbide forming element, which can improve the intercrystalline corrosion resistance of steel. ومع ذلك, titanium carbide has an adverse effect on the surface quality of stainless steel. Therefore, the performance of stainless steel with higher surface requirements is generally improved by adding niobium.

· Nitrogen (N) : it is a strong austenite forming element, which can significantly improve the strength of steel. ومع ذلك, the aging cracking of stainless steel is affected greatly, so the nitrogen content should be strictly controlled in the stainless steel used for stamping.

· Phosphorus, sulfur (P, S) : they are harmful elements in الفولاذ المقاوم للصدأ and have adverse effects on the corrosion resistance and stamping properties of stainless steel.

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