13949000083 hammer failure is mainly high-speed rotation in working condition, and materials violent collision occurs, the working parts have a strong impact wear. Thus, the hammer handle only high strength and toughness. Traditional materials of high manganese steel hammer is a pure austenite wear-resistant steel, with excellent mechanical properties, tensile strength can reach 1000MPa, the highest rate can reach 100% elongation, impact toughness reached 300J / cm2, hardness up to 200HB. High chromium cast iron is an excellent wear-resistant material, but with a lower strength and toughness, impact toughness is usually only 5 ~ 7 J / cm2, prone to fracture upon impact. Therefore, high chrome cast iron work hard particles end to high-manganese steel as the support phase and the hammer handle. High chromium cast iron and high manganese steel production of dual-metal composite hammer, it is metallurgically bonded joints, can better meet the requirements of the hammer.