High Nitrogen Martensitic Stainless Steel

2 to compare the mechanical properties and corrosion.

High nitrogen martensitic stainless steel.

High nitrogen steels hns are a new class of high alloy martensitic austenitic or duplex grades with up to 0 9 mass of n in solid solution. Three experimental nitrogen bearing martensitic stainless steels nitrogen content ranging from 1 600 to 1 900 ppm were produced in an air induction furnace and the n was added into the melt as. Martensitic stainless steel holds promise don jordan solar atmospheres souderton pa. The effects of nitriding pressure and temperature on surface nitrogen content and case depth of martensitic stainless steels were tested resulting in a promising technique for enhancing surface hardness.

Because of this the high nitrogen steel are considered as new promising class of engineering materials. The results indicate that mo n alloying significantly improve the corrosion resistance of mss. High nitrogen martensitic stainless steel hnms is recently developed by partially substituting carbon with nitrogen. Pressure metallurgy is a means of increasing the nitrogen content and thereby the resistance of stainless martensitic steels to pitting corrosion.

High nitrogen martensitic stainless steel shows improved resistance to localized corrosion like pitting crevice and intergranular corrosions over their carbon containing counterparts. The objectives of m. The corrosion erosion resistance of the high nitrogen stainless steels is higher than that of the conventional aisi 420 stainless steel for all the testing temperatures which can be associated to the beneficial effect of nitrogen in solid solution in martensite. 1 to investigate the possibility of producing high nitrogen martensitic stainless steel corresponding to the aisi 420 steel under atmospheric pressure by using gas nitrogen injection in the melt or by addition of fe cr n master alloy.

The present study on their constitution and heat treatment reveals that even at normal pressure more nitrogen is dissolved in the melt if the carbon content increases because the fraction of ferrite is reduced during solidification. They are applied e g. This paper explores the possible improvement in wear properties by cryo. S olid solution of nitrogen atoms in the.