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Register a new userNitriding Double Composite Martensitic- Austenitic Alloy Steel
نتردة الفولاذ السبائكي ذي البنية المركبة (مارتنسايت - أوستنايت)
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عبد الله يوسف مجيد( باحث )
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درست سماكة الطبقة المنتردة و التركيب الطوري و البنية المجهرية و القساوة الميكروية عبر عمق منطقة الانتشار، و قد بينت نتائج البحث أن تأثير نظام النتردة و خاصةً درجة الحرارة يؤدي إلى نمو الطبقة المنتردة على سطح الفولاذ السبائكي ذي البنية المركبة المارتنسيتية - الأوستنيتية. تشير نتائج البحث في الخواص الميكانيكية و الترايبولوجية إلى أن عملية المعالجة بالنتردة الانتشارية لها تأثير كبير في قدرة عمل الفولاذ السبائكي ذي البنية المركبة المارتنسيتية – الأوستنيتية المعرض للاحتكاك الجاف. إذ يزداد العمر الزمني للسبائك المعالجة بالنتردة نحو ( 4-2.5 ) مرة نتيجةً لاستقرار طبقة الاحتكاك و زيادة القساوة السطحية مقارنة بالسبائك غير المعالجة.
The thickness of the diffusion layers was studied, along with the phases and the microstructure and composition, across the depth in diffusion zone. The obtained results proved the effect of nitriding system in the growth of the diffusion layers on surface of double composite martensitic - austenitic alloy steel. Analysis of mechanical and tribological characteristics of treated double composite steel under dry friction was also studied. It was found that diffusion treatment had a significant influence on work capacity of tested alloy. Stability of alloy after nitriding was (2.5-4) times higher in magnitude compared to untreated alloy.
References used
R.W. Kahn, Physical metallurgy, North- Holland Publ., Amsterdam (1987), p.550
A.I. Medved, V.G. Gorbach, Physical and Mechanical Properties alloys Fe-Ni-Al-Ti // Met. And Heat Treat.- Moscow,(1997), N11, pp.68-72
Heat Treatment of Steel, Vol. ASM Handbook, (1991),USA
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