Abstract
In the present investigation, liquid-solid casting and hot rolling method was successfully used to manufacture stainless steel cladding (SSC) rebar. Stainless square tube that was surface treated by pellet blasting treatment was preheated to 1100 °C, and then liquid carbon steel which was heating up by induction furnace to 1620 °C was filled into the tube to cast the SSC billet. SSC billet was rolled in a wire and rod plant successfully due to metallurgical bond state between the tube and carbon steel. Soaking temperature and starting rolling temperature as well as finishing rolling temperature were exhibited 1180C, 1130C and 1000C. Uniaxial tensile testing of SSC rebar at room temperature exhibited an extremely yield strength of 433 MPa and a tensile strength of 599 MPa, while the elongation reached 24%. Positive and negative bending experiment showed no cracks during the deformation. Through metallographic analysis, it was found that the base structure of stainless steel was ferrite, and heterogeneous phases such as martensite and ferrite was discovered near the interface of carbon steel and stainless steel.
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