High Nitrogen Martensitic Stainless Steel

S olid solution of nitrogen atoms in the.

High nitrogen martensitic stainless steel. Martensitic stainless steel holds promise don jordan solar atmospheres souderton pa. 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. High nitrogen martensitic stainless steel shows improved resistance to localized corrosion like pitting crevice and intergranular corrosions over their carbon containing counterparts. 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.

2 to compare the mechanical properties and corrosion. The high nitrogen martensitic stainless steels with different nitrogen contents were smelted under high nitrogen pressure and the smelting homogenization hot forging and spheroidizing annealing processes were described in our previous work the chemical compositions of high nitrogen martensitic stainless steels are shown in table 1 the specimens of 10 mm 10 mm were cut from the plates. To stainless tools and bearings in chemical engineering and for high strength non magnetic components. 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.

The objectives of m. This paper explores the possible improvement in wear properties by cryo. 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.

Pressure metallurgy is a means of increasing the nitrogen content and thereby the resistance of stainless martensitic steels to pitting corrosion. In this work a new high corrosion resistant martensitic stainless steel mss containing high nitrogen content n 0 33 wt was designed based on density functional theory dft calculation and pressurized metallurgy. 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.