High manganese steel crusher hammer with high original hardness and manufacturing method thereof

Abstract

The invention discloses a high manganese steel hammer with high original hardness and a manufacturing method thereof. The hammer is cast from modified high manganese steel which comprises the following chemical components in mass percent: 1.21%-1.35% of C, 13.20%-14.10% of Mn, 0.51%-0.83% of Si, 2.35%-2.48% of Cr, 0.43%-0.48% of Mo, 0.02%-0.030% of S, 0.05%-0.060% of P, 0.18%-0.23% of V, 0.19%-0.25% of Ti, 0.41%-0.52% of RE, 0.58%-0.66% of B and 79.01%-80.87% of Fe. The manufacturing method comprises a production process of the modified high manganese steel, a lost foam casting process and a heat treatment process. The hammer of the invention is produced by fully adopting the modified high manganese steel through a lost foam casting method, and has good comprehensive mechanical properties; and the produced hammer has high original hardness and good wear resistance.

Description

technical field [0001] The invention relates to a crusher hammer head and a manufacturing method thereof, in particular to a high manganese steel crusher hammer head with high original hardness and a manufacturing method thereof. Background technique [0002] Hammer crushers are widely used to crush materials in building materials, electric power, mining, metallurgy, roads and other industries. The hammer head of the crusher is a key part, and it is also a vulnerable part, so the demand is huge. Most of the crusher hammer heads currently used in the market are made of ordinary high manganese steel materials, the matrix structure is austenite, and the surface hardness is HB180-HB220. If the ordinary high manganese steel hammer head works under the impact of high energy and the hardness of the crushed material is relatively high, the surface of the hammer head will produce work hardening phenomenon. After hardening, the surface hardness of the working surface of the hammer he...

AI Technical Summary

Problems solved by technology

However, in actual use, the high-stress conditions are less than 10%. Most hammer heads, especially small and medium-sized hammer heads, do not suffer from large impact stress during work, and the hardness of the crushed materials is not high. The work hardening phenomenon of the manganese steel hammer head is not obvious, and there is no hardened layer with high hardness on the surface of the working surface

Therefore, the wear resistance of ordinary high manganese steel cannot be brought into full play, resulting in early wear and failure of ordinary high manganese steel hammer heads, and a short service life, which not only causes a serious waste of resources, but also increases equipment maintenance time and use costs.

[0003] It can be seen that the main reasons why ordinary high manganese steel hammers are not wear-resistant under the action of small and medium impact stress are: first, the impact energy is small, and the characteristics of work hardening cannot be produced on the working face of the hammer; second, the original hardness of ordinary high manganese steel is low , can not withstand high-speed low-impact impact wear and erosion wear