Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A heat treatment method for extra-thick, extra-wide, and extra-long chromium-molybdenum steel plates

A heat treatment method and steel plate technology, applied in heat treatment furnaces, heat treatment equipment, heat treatment process control, etc., can solve problems such as difficulty in ensuring uniformity of heating, constraints on petrochemical development, and difficulty in meeting technical conditions for the uniformity of performance of the entire steel plate. Improve the performance of the whole board and the qualified rate of performance, prolong the swing time, and have obvious technical effects

Active Publication Date: 2022-04-05
WUYANG IRON & STEEL
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to ensure the uniformity of heating during heat treatment for steel plates of this special specification, and the water volume and water pressure of the quenching machine cannot meet the production requirements during quenching and cooling, which makes it difficult to meet the performance uniformity of the whole plate such as the head and tail, overall thickness and width direction of the steel plate. Technical conditions
The average price of imported steel plates exceeds 30,000 yuan / ton, and foreign countries strictly block core technologies, which seriously restricts the development of my country's petrochemical and coal chemical industries.

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 heat treatment method for extra-thick, extra-wide, and extra-long chromium-molybdenum steel plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The grade of the chromium-molybdenum steel plate in this embodiment is 14Cr1MoR, the thickness of the steel plate is 88 mm, the width is 3300 mm, and the length is 14500 mm.

[0017] The heat treatment method of the chromium-molybdenum steel plate of the present embodiment includes heating and water cooling, and the specific process steps are as follows:

[0018] (1) Heating process: Furnace a single piece of steel plate, heat the single piece to 900°C and keep it warm for 3.2 hours, and raise the furnace temperature by 5°C 30 minutes before tapping.

[0019] (2) Water cooling process: The water cooling process is carried out immediately after heating, the roller speed is 0.02m / s, and the quenching water volume is 8400m 3 / h, the water temperature is 26°C, the water pressure is 0.75MPa, and the low-pressure section swings for 30 minutes.

[0020] After the above process, the performance of the whole plate and the pass rate of the performance after 28h long-term mold we...

Embodiment 2

[0022] The grade of the chromium-molybdenum steel plate in this embodiment is 14Cr1MoR, the thickness of the steel plate is 90 mm, the width is 3350 mm, and the length is 14700 mm.

[0023] The heat treatment method of the chromium-molybdenum steel plate of the present embodiment includes heating and water cooling, and the specific process steps are as follows:

[0024] (1) Heating process: Furnace a single piece of steel plate, heat the single piece to 905°C and keep it for 3.3 hours, and raise the furnace temperature by 6°C 32 minutes before tapping.

[0025] (2) Water cooling process: The water cooling process is carried out immediately after heating, the roll speed is 0.03m / s, and the quenching water volume is 8450m 3 / h, the water temperature is 26.5°C, the water pressure is 0.77MPa, and the low-pressure section swings for 30.5min.

[0026] After the above process, the performance of the whole plate and the pass rate of the performance after 28h long-term mold welding of...

Embodiment 3

[0028] The grade of the chromium-molybdenum steel plate in this embodiment is SA387Gr11CL2, the thickness of the steel plate is 92 mm, the width is 3380 mm, and the length is 14800 mm.

[0029] The heat treatment method of the chromium-molybdenum steel plate of the present embodiment includes heating and water cooling, and the specific process steps are as follows:

[0030] (1) Heating process: Furnace a single piece of steel plate, heat the single piece to 910°C and keep it warm for 3.4 hours, and raise the furnace temperature by 7°C 33 minutes before tapping.

[0031] (2) Water cooling process: The water cooling process is carried out immediately after heating, the roll speed is 0.04m / s, and the quenching water volume is 8490m 3 / h, the water temperature is 27°C, the water pressure is 0.80MPa, and the low-pressure section swings for 31min.

[0032] After the above process, the performance of the whole plate and the pass rate of the performance after 28h long-term mold weldi...

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
thicknessaaaaaaaaaa
widthaaaaaaaaaa
lengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of metallurgy, and discloses a heat treatment method for an extra-thick, extra-wide, and extra-long chromium-molybdenum steel plate, which includes heating and water cooling processes, and the steel plate is made of a steel ingot; After heating to the heat preservation temperature and heat preservation, the furnace temperature is raised by 5 to 10°C 30 to 40 minutes before tapping; in the water cooling process, the roll speed is 0.02 to 0.06m / s, and the quenching water volume is 8400 to 8550m 3 / h, the water pressure is 0.75-0.95MPa, and the low-pressure section swings for 30-35min. The heat treatment method of the present invention comprehensively improves the strength margin, negative temperature impact toughness and performance pass rate of the whole plate of the special specification chromium-molybdenum steel plate in the thickness, width and length directions, and has wide applicability.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a heat treatment method for a chromium-molybdenum steel plate, in particular to a heat treatment method for an extra-thick, extra-wide, and extra-long chromium-molybdenum steel plate. Background technique [0002] With the development of petrochemical and coal chemical industries in the direction of secondary deep processing, oil product upgrading, and heavy / inferior incoming materials, new technologies such as residual oil hydrocracking, coal supercritical water gasification for hydrogen production, and coal gasification for direct olefin production are gradually maturing , the demand for large-scale equipment, thicker walls, and more complex structures has become more urgent, leading to the development of the specifications of extra-thick chromium-molybdenum plates for chemical equipment in the direction of extra-thick, extra-wide, and extra-long. It is difficult to ensure the...

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): C21D1/18C21D9/00C21D6/00C21D11/00
CPCC21D1/18C21D9/0081C21D6/002C21D11/00
Inventor 邓建军李杰李样兵袁锦程吴艳阳龙杰庞辉勇柳付芳牛红星尹卫江侯敬超王东阳顾自有
Owner WUYANG IRON & STEEL
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com