Integral intermediate groove of isothermal quenching ductile iron conveyor and preparation method

The invention discloses an integral intermediate groove of an isothermal quenching ductile iron conveyor. The raw material of the integral intermediate groove is isothermal quenching ductile iron, and the ductile iron comprises the following chemical components in percentage by weight: 3.40 to 3.60 percent of C, 2.00 to 2.40 percent of Si, less than 0.3 percent of Mn, less than 0.03 percent of P, less than 0.02 percent of S, 0.04 to 0.055 percent of Mg, 0.01 to 0.02 percent of Re, 0.60 to 0.80 percent of Cu, 0.20 to 0.30 percent of Mo, and the balance of iron. The integral intermediate groove has the following advantages of high strength, good abrasion resistance, light weight and the like; and the preparation method changes a combined structure of the prior intermediate groove which is formed by welding abrasion-resistant steel plates on a cast steel groove twice into the integral intermediate groove which is cast by a new single isothermal quenching ductile iron material, reduces the time for stopping a machine, and improves the coal mining efficiency.