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

Vacuum heat treatment process

A technology of vacuum heat treatment and heating process, which is applied in the field of heat treatment process to achieve the effect of increasing the heating rate

Inactive Publication Date: 2018-06-12
QINGDAO XIAOMIXING ELECTRONICS TECH CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a more reasonable vacuum heat treatment process. Under the condition of ensuring that no excessive heat treatment deformation occurs, a reasonable preheating time is determined through a large number of tests and summaries, so as to save energy and improve production efficiency. Effect

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] A vacuum heat treatment process, wherein the heating process includes two preheating stages and a final austenitizing stage, and the heating rate of the first preheating stage is controlled at 10-20°C / min.

[0013] The heating rate of the first preheating stage is preferably controlled at 13° C. / min.

[0014] The heating temperature in the first preheating stage is 500-650°C.

[0015] The heating temperature of the first preheating stage is 600°C.

[0016] The present invention increases the heating rate during preheating in the first stage of vacuum heat treatment, so that the furnace temperature can reach the preheating temperature of the first stage (such as 600°C) in advance, and then the surface of the workpiece can also reach the set preheating temperature in advance value. The conduction inside the workpiece mainly depends on the temperature difference between the surface and the core. Similarly, the time for the core of the workpiece to reach the set preheatin...

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

No PUM Login to View More

Abstract

The invention discloses a vacuum heat treatment process. The heating process comprises two preheating stages and a final austenitizing stage, wherein the heating speed of the first preheating stage iscontrolled to be 10-20 DEG C / min, and the heating speed is preferably controlled to be 13 DEG C / min. In the preheating process of the first stage, the rate of finished products is prevented from being affected by internal stress and distortion after the summarized and set heating speed in the process is adopted, so that under the condition that too large heat treatment deformation is not generated, the reasonable preheating time is determined through a plurality of experiments and summaries, and therefore the effects of saving energy and improving the production efficiency are achieved.

Description

technical field [0001] The invention relates to a heat treatment process, in particular to a vacuum heat treatment process. Background technique [0002] In modern heat treatment technology, vacuum heat treatment has been more and more widely used, but the determination of the workpiece heating time and holding time for vacuum heat treatment is still based on empirical estimation. [0003] The heating speed of the vacuum heat treatment process in the prior art is basically the same speed, which is to take into account the internal stress and workpiece distortion that may occur during the heating process. The problem and historical work experience has been to use basically the same heating rate. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a more reasonable vacuum heat treatment process. Under the condition of ensuring that no excessive heat treatment deformation occurs, a reasonable preheating time is determi...

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 Applications(China)
IPC IPC(8): C21D1/773
CPCC21D1/773C21D2211/001
Inventor 曲立辉
Owner QINGDAO XIAOMIXING ELECTRONICS TECH CO LTD