Heat treatment method for down-the-hole drill bit of high-wind pressure drilling tool, and drill bit

A heat treatment method and drilling technology, applied in heat treatment furnaces, heat treatment equipment, manufacturing tools, etc., can solve problems that cannot meet engineering requirements, achieve improved ductility and plastic properties, improve fatigue resistance and wear resistance, and prolong service life Effect

Active Publication Date: 2012-10-03
CHANGSHA HEIJINGANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the acceleration of project implementation speed, higher drilling efficiency requirements, and stricter environmental protection requirements, the existing high-pressure drilling tools down-the-hole drills can no longer meet the engineering requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] This embodiment provides a heat treatment method for a high air pressure drilling tool down-the-hole drill bit. The method includes the following steps:

[0028] S1. Heat the original DTH bit to 750°C to 850°C in a heating furnace, forge the heated DTH original, and put it into the forging die for forming die forging after the original DTH is basically formed. ;

[0029] S2, put the forged down-the-hole drill bit into the heating equipment, heat it under the condition of 900°C-950°C for 4h-5h, then put it in the air to cool the down-the-hole drill bit, and then heat it under the condition of 650°C-700°C Heating at low temperature for 4h~5h, stop the heating and cool down the down-the-hole drilling furnace to below 200℃;

[0030] S3, perform numerical control processing on the out-of-the-hole down-the-hole drill bit according to the size requirements;

[0031] S4, put the DTH drill bit after CNC machining into the carburizing furnace for heating, and carry out carburiz...

Embodiment 2

[0041] This embodiment provides a heat treatment method for a high air pressure drilling tool down-the-hole drill bit. The method includes the following steps:

[0042] S1, the original DTH bit is heated to 780°C in a heating furnace, and the heated DTH original is forged. After the original DTH is basically formed, it is put into the forging die for forming die forging. Among them, the forging of the heated original down-the-hole drill can be forged with a forging machine of 0.75T-3T (ton) according to the size of the down-the-hole drill.

[0043] S2, put the forged down-the-hole drill bit into the heating equipment, heat it at 930°C for 4 hours, then place it in the air to cool the down-the-hole drill bit, and then heat it at 680°C for 4 hours, then stop heating Finally, cool the down-the-hole drill furnace to below 200°C. Among them, the equipment used in the two heating processes is "Aichelin multi-purpose furnace", and the time of the two heatings can be slightly extende...

Embodiment 3

[0049] This embodiment provides a high air pressure drilling tool down-the-hole drill bit, which is manufactured using the heat treatment method described in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a heat treatment method for a down-the-hole drill bit of a high-wind pressure drilling tool. The method comprises the following steps: heating the original down-the-hole drill bit to 750-850 DEG C for forging and beating, forming and die forging, conducting air cooling after heating at 900-950 DEG C for four hours to five hours, conducting furnace cooling to be lower than 200 DEG C after heating at 650-700 DEG C for four hours to five hours, carrying out numerical control machining according to size requirement, conducting carburization treatment at 900-950 DEG C, then conducting high-temperature tempering to the carburization treatment, machining, and conducting isothermal quenching at 850-900 DEG C. The invention further relates to a down-the-hole drill bit of the high-wind pressure drilling tool, which is manufactured by the heat treatment method. The down-the-hole drill bit is subjected to mechanical treatment after being heated and cooled for many times, so that the toughness and plasticity of the down-the-hole drill bit can be greatly improved, the surface hardness and compression stress of the down-the-hole drill bit can also be enhanced, and the fatigue resistance strength and the wear resistance of threads can be improved.

Description

technical field [0001] The invention relates to the field of heat treatment of drill bits, in particular to a heat treatment method for a high-pressure drilling tool down-the-hole drill bit, and a high-wind-pressure drilling tool down-the-hole drill bit manufactured by using the heat treatment method. The drill bit is mainly used in construction, It can be used in the construction of roads, mines, tunnels, etc. to break rocks, excavate blasting holes, etc. Background technique [0002] High air pressure drilling tools down-the-hole drill bits are widely used in blasting projects in mines, hydropower stations, ports, roads and tunnels, etc., for breaking rocks, earthwork, and drilling blasting holes. [0003] At present, high air pressure drilling tools down-the-hole drill bits are generally made of special steel, and the heat treatment process of carburizing and quenching and low-temperature tempering is adopted, so that the carbon content of the drill bit is high, and the t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F17/00C23C8/20C21D1/20C21D9/22
Inventor 杨日平相仁发谢艳云刘少娟
Owner CHANGSHA HEIJINGANG IND CO LTD
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