In order to improve the mechanical properties of 2% Boron 304B7 stainless steel

charge rule of solution treatment after different heat treatment process of 304B7 stainless steel containing boron on the component

microstructure

distribution of borides and mechanical property of 304B7 stainless steel have been studied and analyzed. The results show that two phase compositions of borides are Cr2B and ( FeCr)2B

as-cast state

the borides are distributed in a network shape

and in the rolled state

the borides are distributed in a strip shape along the rolling direction. The borides have good thermal stability

and the amount of borides changes is little after high temperature solution treatment. But at 1 150 °C for 1 h water cooling it is the suitable heat treatment system of 304B7 stainless steel

the borides precipitated by the solution treatment have smaller size and dispersed distribution

and the overall mechanical properties of the material are relatively good

that are impact energy 10.4 J

yield strength 348 MPa

and tensile strength 659 MPa.