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Heat treatment method of perforating head

A heat treatment method and technology of perforated plugs, which are applied in heat treatment furnaces, heat treatment equipment, heat treatment process control, etc., can solve the problems of affecting the service life of perforated plugs, the effect of heat treatment, and easy loosening of scale, so as to improve the effect of heat treatment and improve the use of Lifespan, not easy to loose and peel off

Inactive Publication Date: 2007-08-08
耿志佳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the temperature and atmosphere in the heat treatment furnace are not uniform enough, the heat treatment effect is affected. In the case of poor bonding between the surface oxide layer and the middle layer, the oxide scale on the surface of the plug is easy to loosen and peel off, which directly affects the use of the perforated plug. life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Embodiment 1: The material of the plug is low-alloy steel. After the plug is machined, it is cleaned, degreased, and deembroidered. When the furnace temperature rises to 850 ° C, the plug is installed in the furnace, and the furnace cover is closed. Drop in ethanol, stop dripping ethanol after 1 hour, change to drop the mixed solution of ethanol and water, the mixed solution is mixed according to the volume ratio of ethanol and water 1:4; keep warm for 4 hours when the furnace temperature rises to 1000 ° C, the pressure in the furnace Keep at 0.7 kPa; stop the furnace to cool down after the heat preservation is over, and take the plug out of the furnace when it drops to 850°C; during the above heat treatment process, the high-temperature fan in the furnace operates.

Embodiment 2

[0008] Embodiment 2: The material of the plug is low-alloy steel. After the plug is machined, it is cleaned, degreased, and deembroidered. Drop in ethanol, stop dripping ethanol after 1 hour, change to drop the mixed solution of ethanol and water, the mixed solution is mixed according to the volume ratio of ethanol and water 1:4; keep warm for 4 hours when the furnace temperature rises to 1000 ° C, the pressure in the furnace Keep at 0.9 kPa; stop the furnace to cool down after the heat preservation is over, and take the plug out of the furnace when it drops to 850°C; during the above heat treatment process, the high-temperature fan in the furnace operates.

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PUM

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Abstract

The invention discloses a heat processing method of punching bow, which comprises the following steps: (1) heating furnace temperature to 850 deg.c; loading bow in the furnace; dripping alcohol in the furnace at 5-6ml / min; finishing dripping alcohol after 1h; starting dripping the composite liquid of alcohol and water with bulk rate at 1: 4; (2) heating to 1000 deg.c; insulating 4h; keeping pressure of furnace to 0.6-1.0Kpa; (3) cooling temperature to 850 deg.c; fetching bow out of furnace; transmitting bow through high-temperature fan; making the temperature in the furnace evenly.

Description

technical field [0001] The invention relates to a surface heat treatment process, in particular to a heat treatment method for a plug used for rolling steel piercing. Background technique [0002] Piercing plugs are mainly used in the production process of rolling seamless steel pipes, because the plugs need to withstand high temperature thermal shock and extrusion force during work, often have a low service life, and special heat treatment processes are required in the production process, and now generally use N 2 , CO 2 , NH 3 Organic liquids and gas compounds such as methanol and methanol are passed into the heat treatment furnace, and are decomposed by high temperature to form a wet oxidizing atmosphere, so that the plug can undergo controllable oxidation treatment. The plug is oxidized to form a three-layer structure, the surface oxide layer, the middle layer and the transition layer. Because the temperature and atmosphere in the heat treatment furnace are not unifo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/74C21D9/00C21D11/00
Inventor 耿志佳
Owner 耿志佳
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