Method for achieving steel surface nitrogen increment through nitrogen arc and nitride in-situ metallurgy
An in-situ metallurgy and nitride technology, applied in metal material coating process, fusion spraying, coating, etc., can solve the problems of insignificant effect, hydrogen-induced cracking, time required for drying, etc., and achieve simple operation and good High-strength corrosion resistance and high bonding strength
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[0059] use as figure 1 The device shown uses nitrogen arc and nitride in-situ metallurgy to increase nitrogen on the steel surface, and obtains a high-nitrogen steel layer with a thickness of 2 mm on the surface of Q235B steel. The target composition of the high nitrogen steel layer is shown in Table 1.
[0060] Table 1 The chemical composition requirements of the target high nitrogen steel layer (%)
[0061] chemical composition
N
mn
Cr
Mo
Si
C
Fe
standard specification
0.8-2.4
12-18
18-23
1.0-2.5
≤1
≤0.1
margin
[0062] The method for increasing nitrogen on the steel surface by adopting nitrogen arc and nitride in-situ metallurgy according to the present invention, the specific steps are as follows:
[0063] Step 1, determine the iron element content W through the target alloy composition of the target high-nitrogen steel layer Fe %; determine that iron powder is used as the powder feeding raw...
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