Processing technology of medium-wind-pressure percussion bit

A technology of impact drill and processing technology, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of long production process and high cost, save electricity and labor costs, and shorten the production cycle.

Active Publication Date: 2014-08-27
长沙天和钻具机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the defects in the process design, the production process is long and the cost is high

Method used

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  • Processing technology of medium-wind-pressure percussion bit
  • Processing technology of medium-wind-pressure percussion bit
  • Processing technology of medium-wind-pressure percussion bit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The drill bit of Z102-R45 type is produced, the material is annealed XGQ25 billet, the material composition is Cr:0.25, Ni:1.69, Mo:0.53, Mn:1.45, Si:1.39, V:0.21; after machining to the design size, Heating to 810-815°C, holding for 1 hour, the workpiece temperature is 815°C out of the furnace, placed in a closed quenching tank, the quenching tank has a volume of 1 cubic meter, and the speed of flowing nitrogen gas is 4 cubic meters per hour. The time required for the measured workpiece temperature to drop from 815°C to 550°C is 10 minutes, and the cooling rate of the workpiece is 20°C / s; It takes 20 minutes for ℃ to drop to 350 ℃, and the cooling rate of the workpiece is 10 ℃ / s; when the temperature of the workpiece reaches 350 ℃, the speed of flowing nitrogen gas is 3.5 cubic meters per hour. The time required is 40 minutes, and the cooling rate of the workpiece is 5°C / s; then, it is heated to 160-170°C for low-temperature tempering, and the tempering time is 2-3 hou...

Embodiment 2

[0029] The drill bit of Z102-R45 type is produced, the material is annealed XGQ25 billet, the material composition is Cr:0.25, Ni:1.69, Mo:0.53, Mn:1.45, Si:1.39, V:0.21; after machining to the design size, Heating to 817-822°C, holding for 1 hour, the workpiece temperature is 820°C out of the furnace, placed in a closed quenching tank, the quenching tank has a volume of 1 cubic meter, and the speed of flowing nitrogen gas is 4.5 cubic meters per hour. The time required for the measured workpiece temperature to drop from 820°C to 550°C is 8 minutes, and the cooling rate of the workpiece is 30°C / s; when the workpiece temperature reaches 550°C, the speed of flowing nitrogen gas is 4.0 cubic meters per hour, and the measured workpiece temperature is It takes 14 minutes for 550°C to drop to 350°C, and the cooling rate of the workpiece is 15°C / s; when the workpiece temperature reaches 350°C, the speed of flowing nitrogen gas is 3.8 cubic meters per hour, and the measured workpiece t...

Embodiment 3

[0031] The drill bit of Z102-R45 type is produced, the material is annealed XGQ25 billet, the material composition is Cr:0.25, Ni:1.69, Mo:0.53, Mn:1.45, Si:1.39, V:0.21; after machining to the design size, Heating to 825-830°C, keeping it warm for 1 hour, the workpiece temperature is 825°C, put it in a closed quenching tank, the volume of the quenching tank is 1 cubic meter, and the speed of flowing nitrogen gas is 4.8 cubic meters per hour. It takes 6 minutes for the measured workpiece temperature to drop from 825°C to 550°C, and the cooling rate of the workpiece is 35°C / s; when the workpiece temperature reaches 550°C, the speed of flowing nitrogen gas is 4.5 cubic meters per hour, and the measured workpiece temperature is from It takes 12 minutes for 550°C to drop to 350°C, and the cooling rate of the workpiece is 18°C / s; when the temperature of the workpiece reaches 350°C, the speed of flowing nitrogen gas is 4 cubic meters per hour, and the measured workpiece temperature d...

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Abstract

A processing technology of a medium-wind-pressure percussion bit comprises processing and molding an annealed XGQ25 steel blank machine, heating to 810-830 DEG C in a propane protective-atmosphere furnace, keeping warm for 50-70 minutes, taking out of the furnace, putting in flow nitrogen or inert gases, quenching for three grades, and annealing in a low temperature of 260-220 DEG C. The processing technology is simple, convenient to operate, short in production flow and low in production cost; the prepared drill is good in mechanical property, can completely satisfy requirements of actual working conditions. The processing technology provided by the invention can replace present processing technologies of the medium-wind-pressure percussion bit, and thus is substantial in economic benefits and suitable for industrial production.

Description

technical field [0001] The invention discloses a processing technology of a medium wind pressure impact drill bit, belonging to the technical field of medium wind pressure drilling tool preparation. Background technique [0002] The medium air pressure impact drill refers to the impact drill with a working air pressure of 12-15 Pa; the material of the drill produced by our company is XGQ25 steel (Cr: 0.25, Ni: 1.69, Mo: 0.53, Mn: 1.45, Si: 1.39 , V:0.21), the material is air-quenched steel with good hardenability. At present, the production process of our company to produce the drill bit is: [0003] ①Normalizing: The annealed XGQ25 billet is heated to 860°C for 4-6 hours and then air-cooled. [0004] ②Tempering at high temperature: After normalizing, keep it warm at 650°C-690°C for 6-9 hours, take it out of the furnace and air-cool it. [0005] ③Machining and forming; [0006] ④ Quenching; heating temperature 800°C for 1 hour, oil cooling, cooling rate about 3°C / s; [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/22C21D1/18
Inventor 张秀丽
Owner 长沙天和钻具机械有限公司
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