Unlock instant, AI-driven research and patent intelligence for your innovation.

A high-precision heat treatment process

A high-precision, high-tech technology, applied in the direction of metal material coating process, coating, solid-state diffusion coating, etc., can solve the problems of insignificant energy-saving effect and complicated heat treatment process, so as to improve hardness, save energy and reduce production costs Effect

Active Publication Date: 2018-05-15
东华链条兴化有限公司
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] 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 reasonably select the strength, hardness and toughness of low alloy steel. The heat treatment process of 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.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A high-precision heat treatment process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The invention provides a technical solution: a high-precision heat treatment process, comprising the following steps:

[0016] A. Cleaning and drying: send the workpiece to the washing machine for drying, the drying time is 45min, and then send the dried workpiece to the heating chamber;

[0017] B. Carburizing: Raise the temperature of the heating chamber. During the heating process, the amount of propane is 0.15L / h. Maintain a constant temperature for 10 minutes; then heat the radiant tube in the heating chamber with full power, the temperature rises to 905°C, the amount of propane introduced is 0.15L / h, the standard air is 20L / h, and the carbon potential is 1.1; then diffuse , the diffusion temperature is 905°C, the carbon potential drop is 0.75; then the temperature is lowered to 790°C, the holding time is 10min, and the carbon potential remains at 0.75;

[0018] C. Quenching: Put the workpiece after carburizing in step B into the quenching chamber for quenching, a...

Embodiment 2

[0024] The invention provides a technical solution: a high-precision heat treatment process, comprising the following steps:

[0025] A. Cleaning and drying: send the workpiece to the washing machine for drying, the drying time is 45min, and then send the dried workpiece to the heating chamber;

[0026] B. Carburizing: Heat up the heating chamber. During the heating process, the amount of propane fed is 0.15L / h. When the temperature of the heating chamber rises to 860°C, the amount of propane fed is 0.25L / h, and the standard air is 20L / h. Maintain a constant temperature for 10 minutes; then heat the radiant tube in the heating chamber with full power, the temperature rises to 910°C, the amount of propane introduced is 0.15L / h, the standard air is 20L / h, and the carbon potential is 1.15; then diffuse , the diffusion temperature is 910°C, the carbon potential drop is 0.8; then the temperature is lowered to 795°C, the holding time is 15min, and the carbon potential remains at 0.8...

Embodiment 3

[0033] The invention provides a technical solution: a high-precision heat treatment process, comprising the following steps:

[0034] A. Cleaning and drying: send the workpiece to the washing machine for drying, the drying time is 45min, and then send the dried workpiece to the heating chamber;

[0035] B. Carburizing: Heat up the heating chamber. During the heating process, the amount of propane is 0.15L / h. When the temperature of the heating chamber rises to 870°C, the amount of propane is 0.25L / h, and the standard air is 20L / h. Maintain a constant temperature for 10 minutes; then heat the radiant tube in the heating chamber with full power, the temperature rises to 910°C, the amount of propane introduced is 0.15L / h, the standard air is 20L / h, and the carbon potential is 1.2; then diffuse , the diffusion temperature is 910°C, the carbon potential drop is 0.85; then the temperature is lowered to 800°C, the holding time is 25min, and the carbon potential remains at 0.85;

[0...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-precision heat treatment process which comprises the step A of cleaning and drying, the step B of carburization, the step C of quenching, the step D of oil draining, the step E of cleaning and quenching and the step F of shot blasting and rust prevention. The process is simple, the whole course is environmentally friendly and free of pollution, the hardness, strength and wear resistance of an alloy casting can be effectively improved, and the service life of the alloy casting is prolonged. Meanwhile, in the quenching step, a step quenching and oil cooling way is adopted, the production cost is reduced, energy is saved, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to the technical field of heat treatment of alloy castings, in particular to a high-precision heat treatment process. Background technique [0002] 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 reasonably select the strength, hardness and toughness of low alloy steel. The heat treatment process of 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. Contents of the invention [0003] The purpose of the present invention is to provide a high-precision heat treatment process to solve the problems raised in the above-mentioned background technology. [0004] In order to achieve ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/22C21D1/18C21D7/08C23F17/00
CPCC21D1/18C21D7/08C23C8/22C23F17/00
Inventor 薛文奎蒋亚龙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