Research and Production of HRB400E Chromium Containing Steel Bars
This article introduces the chemical composition,smelting method,rolling process,mechanical properties,metallographic structure,and application effect of HRB400E chromium containing steel bars.The smelting of ribbed steel bars with a Cr content of 0.32～0.42％was achieved by using the method of adding chromium iron and argon refining during the converter steelmaking process,and the Cr element absorption rate reached 90％.In terms of steel rolling,the microalloyed steel billet hot rolling production process is adopted,and the mechanical properties of chromium containing steel bars fully meet the requirements of the agreement.Using low-cost controlled rolling and cooling production technology,bainite structure is prone to occur during the cooling process of rolled parts,and the elongation index does not meet the standard requirements.
HRB400Econtaining chromiumribbed barsmicroalloyingcontrolled rolling and cooling
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