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A kind of preparation method of piston of high wind pressure impactor

A technology of impactor and wind pressure, applied in the field of preparation of high wind pressure impactor piston, can solve the problem of not meeting the requirements of impactor use, reduce retained austenite structure, improve surface hardness and wear resistance, The effect of enhancing hardness and tissue stability

Active Publication Date: 2017-06-16
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

With the acceleration of the implementation of various projects and the improvement of drilling efficiency requirements, the requirements for the service life of the impactor are becoming more and more stringent. The existing high air pressure pistons are obviously unable to meet the requirements of the project for the use of the impactor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] The XGQ25 type steel is selected as the raw material of the piston of the high wind pressure impactor; the piston of the model TG8K is prepared with the raw material of the piston of the high wind pressure impactor.

[0047] The steps are

[0048] 1. Heat the high wind pressure impactor piston raw material to 880-890°C in a box furnace, and repeatedly forge the heated high wind pressure impactor piston raw material, including three times of pier thickening and elongation. After the raw material of the high wind pressure impactor piston is forged to the basic size, the forming die forging is carried out.

[0049] 2. Put the die-forged high-pressure impactor piston into a box-type heating furnace, heat it at 880-890°C for 6 hours, then take it out of the furnace and cool it to room temperature in the air, and then heat it at 680-685°C Heating under the same conditions for 4 hours, stop heating and cool to 500°C with the furnace, then take out the furnace and air cool.

...

Embodiment 2

[0060] The TX-XA type steel is selected as the raw material of the piston of the high wind pressure impactor; the piston of the model TK18 is prepared with the raw material of the piston of the high wind pressure impactor.

[0061] The steps are

[0062] 1. Heat the raw material of the high-pressure impactor piston to 895-905°C in a box-type furnace, and repeatedly forge the heated piston raw material of the high-pressure impactor, including three times of pier thickening and elongation. After the raw material of the high wind pressure impactor piston is forged to the basic size, the forming die forging is carried out.

[0063] 2. Put the die-forged high-pressure impactor piston into a box-type heating furnace, heat it at 890-895°C for 6.5 hours, then take it out of the furnace and cool it to room temperature in the air, and then heat it at 690-695°C Heating under the same conditions for 4.5 hours, stop heating and cool down to 500°C with the furnace, then take out the furnac...

Embodiment 3

[0074] FF710 steel is selected as the raw material of the piston of the high wind pressure impactor; the piston of the model TG8 is prepared with the raw material of the piston of the high wind pressure impactor.

[0075] The steps are

[0076] 1. Heat the raw material of the high-pressure impactor piston to 915-920°C in a box-type furnace, and repeatedly forge the heated high-pressure impactor piston raw material, including three times of pier thickness and elongation. After the raw material of the high wind pressure impactor piston is forged to the basic size, the forming die forging is carried out.

[0077] 2. Put the die-forged high-pressure impactor piston into a box-type heating furnace, heat it at 896-900°C for 7 hours, then take it out of the furnace and cool it to room temperature in the air, and then heat it at 680-685°C Heating under the same conditions for 5 hours, stop heating and cool to 500°C with the furnace, then take out the furnace and air cool.

[0078] 3...

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Abstract

The invention relates to a method for preparing a piston of a high wind pressure impactor, belonging to the technical field of impactor heat treatment. The invention directly quenches the piston blank of the high wind pressure impactor after carburizing, then adopts high temperature tempering treatment, isothermal quenching treatment, primary tempering treatment, cryogenic treatment and secondary tempering treatment to obtain the pre-finished product; the pre-finished product is polished The finished product is obtained after stress relief. The invention can greatly improve the strength, impact resistance, wear resistance and service life of the piston. The invention has reasonable process and is convenient for large-scale industrial application.

Description

technical field [0001] The invention relates to a method for preparing a piston of a high wind pressure impactor, belonging to the technical field of impactor heat treatment. Background technique [0002] High wind pressure impactor pistons are widely used in blasting projects in engineering construction such as roads, bridges, mines, offshore operations, ports, and tunnels. They are used as key components for impactors to provide power for drill bits to break rocks, earthworks, and blast holes. . [0003] At present, the piston of high wind pressure impactor is generally made of special steel, and its treatment process is generally: forging→annealing→cutting→carburizing→high temperature tempering→quenching, low temperature tempering→rough grinding→aging→fine grinding→grinding → Inspection or preheating → carburizing → top cooling → high temperature tempering → quenching → low temperature tempering and other processes. The heat treatment process of carburizing, quenching a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/00C23F17/00C21D1/18C21D1/20C21D6/04
Inventor 师明辉张果
Owner 长沙天和钻具机械有限公司
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