Double-phase stainless steel bar and preparation method thereof
A technology of duplex stainless steel and steel bar, applied in the field of high-strength stainless steel, can solve the problems of high price, no production data and literature reports of 2205 duplex stainless steel bar, increased production cost of stainless steel bar, etc., to improve yield strength and tensile strength Effect
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[0030] Preferred embodiments of the present invention are specifically described below.
[0031] In the first aspect, the present invention provides a duplex stainless steel bar, which improves the yield strength and tensile strength of the duplex stainless steel bar by adding microalloying elements on the basis of the composition of 2205 stainless steel. The alloy composition of the duplex stainless steel bar consists of The mass percentages are: C≤0.03%, Si 0.20%~0.80%, Mn 0.80%~1.60%, Cr21.00%~23.00%, Ni 4.50%~5.50%, Mo 2.50%~3.50%, Nb 0~0.05 %, V 0-0.16%, Ti 0-0.02%, N 0.15%-0.20%, P≤0.020%, S≤0.010%, and the balance is Fe and unavoidable impurity elements.
[0032] Wherein, the so-called microalloying elements refer to one or more of Nb, V and Ti. It should be noted that since the design idea of the present invention is to increase the yield strength and tensile strength of the solution-treated duplex stainless steel bar by adding microalloy elements, therefore, there ...
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