Induction Melting of High Nitrogen Stainless Steel

We have already known the application of induction melting in cast iron. In fact, induction melting technology plays an important role in other fields. High nitrogen stainless steel is a kind of steel with nitrogen content greater than 0.08% in ferrite matrix (mass fraction, the same below) or with nitrogen content greater than 0.4% in austenite matrix. So what effect does induction melting technology have on high nitrogen stainless steel?

First of all, we must understand that high nitrogen stainless steel, high nitrogen stainless steel has many advantages, such as high toughness and strength, good ductility, corrosion resistance, low permeability, high nitrogen stainless steel is superior to ordinary steel, mainly because of the addition of nitrogen element, if there is residual in the steel in the early stage, it will cause aging hardening, porosity and bias. After analysis, the steel castings with serious defects will be scrapped. Researchers later found that nitrogen can significantly improve the strength of steel and increase the corrosion resistance of steel.

In order to study the effect of nitrogen injection and addition of ferrochromium nitride on nitrogen enhancement of molten steel, the staff of scientific research center of our plant melted high nitrogen nickel-free stainless steel in vacuum furnace by induction melting technology, changing nitrogen partial pressure, temperature and adding ferrochromium nitride alloy. The theoretical results were estimated. By comparing the experimental results and theoretical results, it was found that changing nitrogen pressure and temperature could be smelted. The effect of increasing nitrogen partial pressure is more obvious when nitrogen-containing stainless steel is smelted. Adding nitrogen-containing alloy to melt high nitrogen stainless steel, the effect of increasing nitrogen is more obvious than adjusting temperature and nitrogen partial pressure, and the actual nitrogen content is higher than the theoretical value.

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