A heat treatment and quenching method for hammerheads of crushers

Abstract

The invention relates to a heat-treatment quenching method for a crusher hammerhead. The heat-treatment quenching method includes that aiming at the defects that the crusher hammerhead is low in hardness and strength, prone to shedding in surfacing layer and short in service life, chrome-molybdenum steel is used as a material, and an intermediate-frequency sensor quenching mode is adopted for treatment; a square-frame-shaped quenching sensor box, a liquid spraying pipe and a busbar which are made by red copper are manufactured, quenching liquid is adopted for spray cooling, quenching temperature is 920 DEG C, intermediate-frequency voltage is 700 V, intermediate-frequency frequency is 3KHz, and intermediate-frequency power is 200KW. The heat-treatment quenching method is advanced in process and accurate and detailed in data, the hammerhead after being quenched is high in hardness, strength and impact resistance and long in service life, matrix hardness can reach HB280, surface layer hardness reaches HRC66, wear layer depth reaches 55mm, and service life can be prolonged by five times when compared with that of an existing hammerhead, and the heat-treatment quenching method is quite ideal for the crusher hammerhead.

Description

technical field [0001] The invention relates to a heat treatment and quenching method for a hammer head of a crusher, belonging to the technical field of coal mine mechanical parts manufacturing and process methods. Background technique [0002] In coal mining and processing operations, many crushers are used to impact and crush coal and stones, which requires the crusher to have strong power and impact resistance; the crusher directly crushes coal and stones. The part of the block is the hammer head, and the base material of the hammer head is mostly chrome-molybdenum steel. In order to improve the hardness and strength of the working surface of the hammer head, most of them are surfacing and spray-welded with wear-resistant materials on the surface of the hammer head to increase the surface quality of the hammer head. Excellent mechanical properties and impact resistance, but in the process of use, the wear-resistant material of the surfacing and spray welding on the surfa...

AI Technical Summary

Problems solved by technology

[0002] In coal mining and processing operations, many crushers are used to impact and crush coal and stones, which requires the crusher to have strong power and impact resistance; the crusher directly crushes coal and stones. The part of the block is the hammer head, and the base material of the hammer head is mostly chrome-molybdenum steel. In order to improve the hardness and strength of the working surface of the hammer head, most of them are surfacing and spray-welded with wear-resistant materials on the surface of the hammer head to increase the surface quality of the hammer head. Excellent mechanical properties and impact resistance, but in the process of use, the wear-resistant material of the surfacing and spray welding on the surface of the hammer head is easy to fall off when impacted, the effective depth of surfacing welding is only 5mm, and the hardness is only HRC45. It affects the crushing performance and safety production efficiency of the crusher

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