METHOD OF PRODUCING HAMMER FOR SHREDDING PLANT Russian patent published in 2017 - IPC C21D8/00 B02C13/00 

FIELD: metallurgy.

SUBSTANCE: first, hammer workpiece of rectangular shape is cut out of continuously cast slab at a temperature not less than 400°C. The workpiece is heated to 1100-1300°C, subjected to press forging, heated in a stove to 820-840°C at a rate of not more than 80°C/h, held for 3÷4 hrs and cooled with the stove to a temperature of 300-400°C, then the hammer of the required size is cut out of the original workpiece at the gas-cutting machine, the mounting bore of the hammer is subjected to mechanical processing and heat treating of the hammer is carried out by heating it to Ac₃+30÷50°C at a rate of not more than 80°C/h and holding at this temperature for 3÷4 hrs, cooling of the hammer working part in a water bath and subsequent air cooling, heating of the hammer to 150-250°C and holding for 4÷6 hrs and subsequent air cooling, wherein the slab is made of 40HS2N2M steel.

EFFECT: increased durability of the hammer, increased productivity and decreased exhaust of the hammer mounting bore.

2 cl