Super carbonitriding process

A C-N, process technology, applied in the direction of metal material coating process, manufacturing tools, coating, etc., can solve the problems of complex heat treatment process, manual adjustment of inductors, and insignificant energy-saving effect, to improve hardness, save energy, structure stable effect

Active Publication Date: 2016-09-28
东华链条兴化有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The C-N co-infiltration process is mostly used for surface quenching of industrial metal parts. Due to the advantages of high strength and high wear resistance, alloy steel castings gradually replace ordinary carbon steel parts and are widely used in the field of casting. In practical applications, it is necessary to choose low The strength, hardness and toughness of alloy steel, the existing heat treatment process of alloy steel castings is complicated, and the energy-saving effect is not obvious. Although its strength and hardness can be improved to a certain extent, the process needs to be improved for certain high-demand and high-standard workpieces.
The current super-audio frequency induction hardening machine heats and quenches the workpiece through induction heating, but the quenched workpiece is generally large, so the workpiece is difficult to carry, and the sensor can only be adjusted manually, which is difficult and has low precision.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A super C-N co-infiltration process, the process steps are as follows:

[0020] (1) Check whether the workpiece has cracks, bruises and other defects, and install the furnace;

[0021] (2) PPC sends the workpiece to the cleaning machine for cleaning and drying, and the time is 35 minutes;

[0022] (3) PPC sends the workpiece into the heating chamber for carburization, the radiant tube in the heating chamber is heated at full power, and the heating chamber is heated up. During the heating process, the amount of methanol introduced is 2L / h, the amount of propane is 4L / min, and the standard air is 90ml / min , the carbon potential is 1.0, the ammonia gas is 0.3m 3 / h, the temperature of the heating chamber rises to 840°C, and then maintains a constant temperature, and the holding time is 180min; after that, diffusion is carried out, the diffusion temperature is 840°C, and the carbon potential drops to 0.80; then the temperature is lowered to 800°C, and the holding time is 2...

Embodiment 2

[0030] A super C-N co-infiltration process, the process steps are as follows:

[0031] (1) Check whether the workpiece has cracks, bruises and other defects, and install the furnace;

[0032] (2) PPC sends the workpiece to the cleaning machine for cleaning and drying, and the time is 40 minutes;

[0033] (3) PPC sends the workpiece into the heating chamber for carburization, and the radiant tube in the heating chamber is heated at full power to raise the temperature of the heating chamber. During the heating process, the amount of methanol introduced is 1.5L / h, the amount of propane is 5L / min, and the standard air is 90ml / min. min, carbon potential is 1.1, ammonia gas is 0.2m 3 / h, the temperature of the heating chamber rises to 860°C, and then maintains a constant temperature, and the holding time is 150min; after that, diffusion is carried out, the diffusion temperature is 860°C, and the carbon potential drops to 0.85; then the temperature is lowered to 820°C, and the holdi...

Embodiment 3

[0041] A super C-N co-infiltration process, the process steps are as follows:

[0042] (1) Check whether the workpiece has cracks, bruises and other defects, and install the furnace;

[0043] (2) PPC sends the workpiece to the washing machine for cleaning and drying, and the time is 30 minutes;

[0044] (3) PPC sends the workpiece into the heating chamber for carburization, the radiant tube in the heating chamber is heated at full power, and the heating chamber is heated up. During the heating process, the amount of methanol introduced is 1L / h, the amount of propane is 4L / min, and the standard air is 80ml / min , the carbon potential is 0.9, the ammonia gas is 0.1m 3 / h, the temperature in the heating chamber rises to 840°C, and then maintains a constant temperature, and the holding time is 110min; then diffuses, the diffusion temperature is 840°C, and the carbon potential drops to 0.70; then the temperature is lowered to 810°C, and the holding time is 20min, and the carbon Po...

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Abstract

The invention discloses a super carbonitriding process which comprises the following processing steps of checking, cleaning, drying, carburizing, quenching, draining oil, cleaning, drying, tempering, detecting, blasting shots and rusting. The super carbonitriding process is simple, the whole super carbonitriding process is environmental-friendly and population-free, the hardness, the strength and the wear resistance of the product can be improved effectively, and the service life of the product is prolonged; the carburizing process is adopted, so that the structure of the product is relatively stable, and the product resists high temperature, and is not prone to deform and damage; cooling is conducted by adopting a step quenching oil cooling way, the production cost is reduced, energy sources are saved, the environment pollution is reduced, and economic benefits are improved; through shot blasting and rusting, the product is relatively stable and durable, and the service life is prolonged; and workpieces are conveyed by a PPC, so that the waste of manpower resources is less, and the working efficiency is improved.

Description

technical field [0001] The invention relates to a super C-N co-infiltration process. Background technique [0002] The C-N co-infiltration process is mostly used for surface quenching of industrial metal parts. Due to the advantages of high strength and high wear resistance, alloy steel castings gradually replace ordinary carbon steel parts and are widely used in the field of casting. In practical applications, it is necessary to choose low The strength, hardness and toughness of alloy steel, the existing heat treatment process of alloy steel castings is complicated, and the energy-saving effect is not obvious. Although its strength and hardness can be improved to a certain extent, the process needs to be improved for certain high-demand and high-standard workpieces. . The current super-audio frequency induction hardening machine heats and quenches the workpiece through induction heating, but the quenched workpiece is generally large, so the workpiece is difficult to carry,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C8/30C21D1/18C21D7/06C23C8/32C21D9/32
CPCC21D1/18C21D7/06C21D9/32C21D2211/001C21D2211/008C23C8/30C23C8/32
Inventor 蒋亚龙薛文奎徐孙传卢俊王广忠宗勇彬张文泉
Owner 东华链条兴化有限公司
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