Device for realizing nitrogen increment on surface of steel through nitrogen arc and nitride in-situ metallurgy
An in-situ metallurgy and nitride technology, applied in metal material coating process, coating, etc., can solve the problems of drying time, ineffective effect, hydrogen-induced cracks, etc., and achieve simple operation, high bonding strength, good The effect of high strength and corrosion resistance
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[0059] Use such as figure 1 In the device shown, nitrogen arc and nitride in-situ metallurgy are used to realize nitrogen addition on the steel surface, and a high nitrogen steel layer with a thickness of 2 mm is obtained on the surface of Q235B steel. The target composition of the high nitrogen steel layer is shown in Table 1.
[0060] Table 1 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] Adopt the method of the present invention to adopt nitrogen arc and nitride in-situ metallurgy to realize nitrogen increase on steel surface, and its specific steps are:
[0063] Step 1: Determine the iron content W through the target alloy composition of the target high nitrogen steel layer Fe %; determine the iron powder as the powder feeding raw material...
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