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Wear-resisting hammer head for hammer type breaking machine and production method of wear-resisting hammer head

A hammer crusher and hammer head technology, which is applied in the field of crushers, can solve the problems that restrict the stable operation of the production line, cannot meet the feeding requirements, and the uneven texture of the material, so as to ensure good combination, high hardness and wear resistance, The effect of removing internal stress

Inactive Publication Date: 2015-11-25
NANJING MEISHAN METALLURGY DEV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the impact toughness of each point of 1# and 2# hammerheads is quite different, it shows that the material structure is uneven, so this type of hammerhead is easy to form local peeling wear during work, and at the same time, the material toughness is not enough, which will cause pear-cutting. Wear and tear, this is the main reason for the short service life of the 1# and 2# hammerheads currently used by Meishan Iron and Steel Co. , seriously restricting the stable operation of the production line

Method used

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  • Wear-resisting hammer head for hammer type breaking machine and production method of wear-resisting hammer head
  • Wear-resisting hammer head for hammer type breaking machine and production method of wear-resisting hammer head
  • Wear-resisting hammer head for hammer type breaking machine and production method of wear-resisting hammer head

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Embodiment 1

[0046] The invention provides a wear-resistant hammer head for a hammer crusher, which includes a high manganese steel lifting lug and a high chromium cast iron hammer head body.

[0047] The specific production method is:

[0048] (1) Melting:

[0049] Put high-carbon ferrochromium, ferromolybdenum FeMo60, nickel plate, pig iron and steel scrap into a 250Kg medium-frequency induction furnace for melting, and control the melting temperature at 1450°C; add aluminum for deep deoxidation and perform degassing and inclusion removal treatment

[0050] (2) Deterioration treatment:

[0051] The molten iron in step (1) is tapped at a high temperature, and the tapping temperature is controlled at 1480°C, and Ti, Nb, Ce and La are added for modification during tapping, so as to ensure the percentage of the metamorphic component in the total mass of the molten iron 0-0.2%;

[0052] (3) Pouring:

[0053] Pre-cast high-manganese steel lifting lugs, and remove surface impurities on the ...

Embodiment 2

[0067] Adjust the chemical composition of the hammer body, as shown in Table 5, and increase the quenching temperature to 1050° C., the tempering temperature to 400° C., and the tempering time to 3 hours during the heat treatment in step (4).

[0068] Table 5: The chemical composition list of hammerhead body in embodiment 2:

[0069] Element C Cr Si mn Mo Cu Ni V Ti, Nb, Re before spoilage 2.74 19.14 0.98 0.74 1.08 0.64 0.82 0.13 trace After spoilage 2.42 18.98 0.79 0.78 1.11 0.58 0.83 0.25 trace

[0070] Table 6: Carbon equivalent and carbide volume fraction of the hammerhead body in Example 2:

[0071] model C eq / ％ cast iron type Carbide volume fraction / % before spoilage 3.77 hypoeutectic 30.90 After spoilage 3.68 hypoeutectic 28.91

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Abstract

The invention provides a wear-resisting hammer head for a hammer type breaking machine. The wear-resisting hammer head comprises a high-manganese-steel lifting lug and a high-chrome iron hammer head body. The production method comprises smelting, modification treatment, casting and heat treatment. The hammer head produced through the method has the higher hardness and wear resistance, and wear of the hammer head in the using process is reduced; toughness of the hammer head can be obviously improved, and good bonding of hardness and the toughness is ensured; and the phenomenon that due to higher brittleness, the hammer head is broken in the using process is avoided.

Description

technical field [0001] The invention belongs to the technical field of crushers and production methods thereof, and in particular relates to a wear-resistant hammer head for hammer crushers and a production method thereof. Background technique [0002] Hammer crusher is one of the commonly used equipment in crushing production line and sand making production line. It is widely used in crushing iron ore, sandstone, gypsum, blast furnace slag, coal gangue, lump coal and other medium hard ores. The iron raw material system of Nanjing Meishan Metallurgical Development Co., Ltd. New Business Branch currently uses a reversible impact hammer crusher online to undertake the crushing task of crushing sintered raw material limestone, and the hammer head is one of the core components of the hammer crusher. Arranged on the pin shaft of the crusher rotor, the hammer head directly hits the material when the crusher is running at high speed. Therefore, the hammer head is constantly impacte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C37/10C22C33/08C21D1/18C21D5/00
Inventor 徐根华方大鸣杨杰李杰高志强张红
Owner NANJING MEISHAN METALLURGY DEV
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