Thermal treatment process of copper tube perforation needle

A piercing needle and process technology, which is applied in the field of heat treatment, can solve the problem of low service life and achieve the effect of improving the mission of use and service life

Inactive Publication Date: 2012-09-19
WUXI HONGDA HEAT TREATMENT FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ambient temperature of the perforating needle is 500~800°C, the hardness requirement is 48~52HRC, and the conventional heat treatment process plan is adopted: 1050~1100°C quenching + 560~600°C×8~12h×3 times of tempering, and its service life is very low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: a heat treatment process for a copper tube perforating needle, comprising the following process steps:

[0012] (1) The perforation needle (size: ?40mm×580mm) is heated in the first stage of the salt bath furnace at 820℃ for 20 minutes; then the perforation needle is heated in the salt bath furnace at 1020℃ for the first stage Two-stage heating treatment, the heating time is 22 minutes;

[0013] (2) Quenching and cooling: Cool the perforated needle in quenching oil at 50 °C for 4 minutes, and cool the perforated needle to 300 °C to produce oil; then cool it naturally to 100 °C in the air, and the cooling time is 1 hour;

[0014] (3) Tempering treatment: Temper the perforated needle after quenching and cooling treatment at 560 °C for 8 hours, and then naturally cool it to room temperature in the air;

[0015] (4) The operation of step (3) is repeated twice, that is, the heat treatment process of the perforating needle is completed. After the heat treatment...

Embodiment 2

[0016] Embodiment 2: a heat treatment process for a copper tube perforating needle, comprising the following process steps:

[0017] (1) The perforation needle (size: ?33mm×560mm) was heated in the first stage of the salt bath furnace at 850℃ for 18 minutes; then the perforation needle was heated in the salt bath furnace at 1050℃ for the first stage Two-stage heating treatment, the heating time is 20 minutes;

[0018] (2) Quenching and cooling: Cool the perforated needle in quenching oil at 80 °C for 5 minutes, and cool the perforated needle to 250 °C to produce oil; then naturally cool it to 120 °C in the air, and the cooling time is 1.5 hours;

[0019] (3) Tempering treatment: Temper the perforated needle after quenching and cooling treatment at 600 °C for 12 hours, and then naturally cool it to room temperature in the air;

[0020] (4) The operation of step (3) is repeated 3 times, that is, the heat treatment process of the perforating needle is completed, and the hardness...

Embodiment 3

[0021] Embodiment 3: a heat treatment process for a copper tube perforating needle, comprising the following process steps:

[0022] (1) The perforation needle (size: ?70mm×1050mm) is heated in the first stage of the salt bath furnace at 830℃ for 35 minutes; Two-stage heating treatment, the heating time is 42 minutes;

[0023] (2) Quenching and cooling: Cool the perforated needle in quenching oil at 60 °C for 8 minutes, and cool the perforated needle to 260 °C to produce oil; then cool it naturally to 110 °C in the air, and the cooling time is 1.2 hours;

[0024] (3) Tempering treatment: Temper the perforated needle after quenching and cooling treatment at 580 °C for 10 hours, and then naturally cool it to room temperature in the air;

[0025] (4) The operation of step (3) is repeated twice, that is, the heat treatment process of the perforating needle is completed. After the heat treatment, the hardness of the perforating needle is 49HRC.

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PUM

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Abstract

The invention relates to a thermal treatment process of a copper tube perforation needle. The thermal treatment process is characterized by comprising the following process steps of: (1) performing first-stage heating treatment on a perforation needle in a salt bath furnace of 820-850 DEG C, and performing second-stage heating treatment on the perforation needle in a salt bath furnace of 1,020-1,050 DEG C; (2) cooling the perforation needle in quenching oil of 50-80 DEG C, discharging oil when the perforation needle is cooled to 300-250 DEG C, and naturally cooling to 100-120 DEG C in air; (3) performing tempering treatment: performing tempering treatment on the perforation needle, which is subjected to quenching and cooling treatment, at 560-600 DEG C, preserving heat for 8-12 hours and then naturally cooling in air to room temperature; and (4) repeating the operation of the step (3) for two to three times to finish the thermal treatment process of the perforation needle. According to the thermal treatment process of the copper tube perforation needle, the service life is prolonged, a new process for thermal treatment of the perforation needle is developed, the service life can be prolonged by six times, and the hardness of the copper tube perforation needle after thermal treatment can be 47-52 HRC (Rockwell hardness).

Description

technical field [0001] The invention relates to a heat treatment method, in particular to a heat treatment process of a copper tube perforating needle. Background technique [0002] The tool used for perforating the copper tube is a perforating needle. The material of the perforating needle is 3Cr2W8V. The composition of the 3Cr2W8V material is: C: 0.30%~0.40%; Si≤0.40%; Mn≤0.40%; Cr: 2.20%~2.70%; W : 7.50%~9.00%; V: 0.20%~0.50%; P≤0.030%; S≤0.030%; the balance is Fe. The ambient temperature of the perforating needle is 500~800℃, and the hardness is required to be 48~52HRC. The conventional heat treatment process is adopted: 1050~1100℃ quenching +560~600℃×8~12h×3 times of tempering, its service life is very low. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, and to provide a heat treatment process for a copper tube perforating needle, which can improve the service life. [0004] According to the te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/26C21D1/18C21D1/46C21D1/58
Inventor 蒋兴余振军
Owner WUXI HONGDA HEAT TREATMENT FORGING
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