Bainite martensite dual phase composite structure can be obtained through a variety of techniques.

Bainite martensite dual phase composite structure can be obtained through a variety of techniques.
Is a by adding silicon obtained by normalizing treatment, such as chemical composition: 43 C:0., Si: 1. 3, Mn: 1. 2, Cr: 1. 8, Mo: 0. 25, B and a small amount of RE and later through by interrupted normalizing treatment process;

Another method is in its chemical composition by the addition of titanium and boron obtained through modification and proper heat treatment, such as chemical composition: C: 0. 3 to 0. 45, Si: 0. 8 ~ 1. 8 Mn 1. 0 to 1. 8, Cr: 0. 8 ~ 1. 8, Mo / Cu: 0. 1 ~ 0. 5, / B: 0. 001 to 0. 003, re: 0. 02 to 0. 06. Late using RZ - Si - Ca - Ti - B multiple compound modification agent for modification, and quenching + tempering heat treatment can obtain bainite ferrite + martensite composite tissue;

Improved hammer of pearlite austenite castings to obtain a third process by using cheap Si, Mn alloying by controlled cooling. Its chemical composition is: C: 0. 35 ~ 0. 70, Si: 1. 0 ~ 2. 5, Mn: 2. 0 ~ 4. 0. Then by using the control cooling technology in 900 DEG C, the use of injection (cooling rate) to the workpiece during the cooling process, avoid area, fast cooled to bainite transformation region, the termination of the spray cooling, and then the corresponding heat preservation measures, the use of residual heat of casting, to create similar isothermal quenching of external conditions, to complete the bainite transformation. Bainite martensite wear-resistant steel production service life of high manganese steel hammer head 1 times above.