Annealing process for high-strength hardware bolts

An annealing process, a technology for metal bolts, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., can solve the problems of difficult breakthroughs in physical properties of bolts and single methods, and achieve the effect of improving annealing quality, reducing processing difficulty and ensuring strength performance.

Active Publication Date: 2018-07-20
SUZHOU TEXIN PRECISION ELECTRONICS CO LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Hardware spare parts refer to machine parts or components made of hardware, as well as some small hardware products. They can be used alone or as auxiliary tools. Among them, hardware bolts are one of the typical representatives of hardware spare parts. The physical properties of bolts on the market It is difficult to make a breakthrough in terms of performance. If the material of the bolt is adjusted, the production cost will be greatly increased. However, the annealing process for hardware bolts is relatively traditional and the method is single. Therefore, it is currently necessary to improve the annealing process of hardware bolts to achieve the traditional A breakthrough in the physical properties of bolts

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 1

[0016] An annealing process for high-strength hardware bolts, specifically comprising the following steps:

[0017] (1) Preheating: Put multiple hardware bolts into a high-temperature furnace at the same time for preheating treatment. The preheating temperature is 120°C, and the preheating time in the step (1) is 70 minutes;

[0018] (2) Intermittent heating: Control the temperature in the high-temperature furnace to heat at a heating rate of 50°C / h for 2 hours and then pause, that is, turn off the power of the high-temperature furnace and cool with the furnace for 10 minutes, then heat at a heating rate of 50°C / h for 2 hours and then pause, that is After the power of the high temperature furnace is turned off and the furnace is cooled for 15 minutes, it is finally heated to 680°C at a heating rate of 120°C / h and kept for 3 hours;

[0019] (3) Intermittent cooling: Cool with the furnace for 1.5 hours, then control the temperature in the high-temperature furnace to cool down at...

Embodiment 2

[0022] An annealing process for high-strength hardware bolts, specifically comprising the following steps:

[0023] (1) Preheating: Put multiple hardware bolts into a high-temperature furnace at the same time for preheating treatment. The preheating temperature is 160°C, and the preheating time in the step (1) is 50 minutes;

[0024] (2) Intermittent heating: Control the temperature in the high-temperature furnace to heat at a heating rate of 90°C / h for 1 hour and then pause, that is, turn off the power of the high-temperature furnace and cool with the furnace for 15 minutes, then heat at a heating rate of 90°C / h for 1 hour and then pause, that is After the power of the high temperature furnace is turned off and the furnace is cooled for 20 minutes, it is finally heated to 720°C at a heating rate of 100°C / h and kept for 2 hours;

[0025] (3) Intermittent cooling: Cool with the furnace for 2.5 hours, then control the temperature in the high-temperature furnace to cool down at a...

Embodiment 3

[0028] An annealing process for high-strength hardware bolts, specifically comprising the following steps:

[0029] (1) Preheating: Put multiple hardware bolts into a high-temperature furnace at the same time for preheating treatment. The preheating temperature is 140°C, and the preheating time in the step (1) is 60 minutes;

[0030] (2) Intermittent heating: Control the temperature in the high-temperature furnace to heat at a heating rate of 70°C / h for 1.5 hours and then pause, that is, turn off the power of the high-temperature furnace and cool with the furnace for 12.5 minutes, and then heat at a heating rate of 70°C / h for 1.5 hours Pause, that is, after the power of the high-temperature furnace is turned off and the furnace is cooled for 17.5 minutes, it is finally heated to 700°C at a heating rate of 110°C / h and kept for 2.5h;

[0031] (3) Intermittent cooling: Cool with the furnace for 2 hours, then control the temperature in the high-temperature furnace to cool down at ...

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 an annealing process for high-strength hardware bolts. The multiple hardware bolts are put into a high-temperature furnace for preheating treatment at first, and the preheatingtemperature is 120-160 DEG C; then the temperature inside the high-temperature furnace is controlled with the heating speed of 50-90 DEG C / h to conduct heating for 1-2 hours and then stop heating, cooling with the furnace is conducted for 10-15 min, heating is conducted for 1-2 hours with the heating speed of 50-90 DEG C / h, cooling with the furnace is conducted for 15-20 min, then heating is conducted with the heating speed of 100-120 DEG C / h till the temperature is 680-720 DEG C finally, and heat preservation is conducted for 2-3 hours; and cooling with the furnace is conducted for 1.5-2.5 hours, then the temperature inside the high-temperature furnace is controlled with the cooling speed of 10-30 DEG C / h to conduct cooling for 20-40 min, cooling with the furnace is conducted till the temperature is below 540-560 DEG C, and then the high-temperature furnace is opened and naturally cooled to the room temperature. In this way, the annealing quality can be greatly improved, the machining difficulty is reduced for the subsequent process, and the strength performance of the hardware bolts is further ensured.

Description

technical field [0001] The invention relates to the field of hardware accessories, in particular to an annealing process for high-strength hardware bolts. Background technique [0002] Hardware spare parts refer to machine parts or components made of hardware, as well as some small hardware products. They can be used alone or as auxiliary tools. Among them, hardware bolts are one of the typical representatives of hardware spare parts. The physical properties of bolts on the market It is difficult to make a breakthrough in terms of performance. If the material of the bolt is adjusted, the production cost will be greatly increased. However, the annealing process for hardware bolts is relatively traditional and the method is single. Therefore, it is currently necessary to improve the annealing process of hardware bolts to achieve traditional A breakthrough in the physical properties of bolts. Contents of the invention [0003] The technical problem mainly solved by the prese...

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): C21D9/00C21D1/26
CPCC21D1/26C21D9/0093
Inventor 方国章
Owner SUZHOU TEXIN PRECISION ELECTRONICS CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap