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

Low-strength and high tenacity SA387Gr11C11 steel plate and production method thereof

A production method and high-toughness technology, applied in the field of metallurgy, can solve the problems that the yield strength cannot meet the design requirements and the strength requirements are low, and achieve the effects of low cost, stable mechanical properties, and moderate strength of the steel plate

Inactive Publication Date: 2019-06-14
WUYANG IRON & STEEL
View PDF8 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] SA387Gr11Cl1 steel is an American standard container steel. Because Cr and Mo elements are added to this steel at the same time, it has good high temperature performance and thermal strength performance. It is widely used in petroleum, coal chemical and petrochemical steel pipes as key materials. This steel belongs to American standard ASME SA387 / SA387M Class I steel has relatively low strength requirements. At the same time, there is an upper limit for yield and -20°C low-temperature impact toughness steel plates for special requirements. The yield strength cannot meet the design requirements easily due to conventional production methods.

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
  • Low-strength and high tenacity SA387Gr11C11 steel plate and production method thereof
  • Low-strength and high tenacity SA387Gr11C11 steel plate and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The low-strength and high-toughness SA387Gr11Cl1 steel plate in this example has a thickness of 28mm, and its chemical composition and mass percentage are shown in Table 1.

[0017] The production method of the low-strength and high-toughness SA387Gr11Cl1 steel plate of this embodiment comprises steelmaking, heating, rolling, and heat treatment operations, and the specific process steps are as follows:

[0018] (1) Steelmaking process: LF seat bag feeds aluminum wire 0.7㎏ / t steel, controls Al: 0.020% in the whole process, maintains the VD vacuum process for 15 minutes, maintains the large argon flow rate of 70NL / min for 10 minutes, and maintains the minimum argon flow rate of 25NL / min in the later stage of vacuum. The argon flow is maintained for 5 minutes; after vacuum, soft blowing is performed for 13 minutes, and the pressure of soft blowing is 0.27MPa;

[0019] (2) Billet heating process: the billet heating temperature is 1250°C, the heating coefficient is 11min / cm,...

Embodiment 2

[0024] The low-strength and high-toughness SA387Gr11Cl1 steel plate in this example has a thickness of 30 mm, and its chemical composition and mass percentage are shown in Table 1.

[0025] The production method of the low-strength and high-toughness SA387Gr11Cl1 steel plate of this embodiment comprises steelmaking, heating, rolling, and heat treatment operations, and the specific process steps are as follows:

[0026] (1) Steelmaking process: LF seat bag feeds aluminum wire 0.9㎏ / t steel, controls Al: 0.045% in the whole process, maintains 20min in the VD vacuum process; maintains a large argon flow rate of 100NL / min for 13min, and maintains a minimum flow rate of 60NL / min in the later stage of vacuum. The flow of argon gas is kept for 7 minutes; after vacuum, soft blowing is performed for 17 minutes, and the pressure of soft blowing is 0.29MPa;

[0027] (2) Billet heating process: the billet heating temperature is 1230°C, the heating coefficient is 9.0min / cm, and rolling is c...

Embodiment 3

[0032] The low-strength and high-toughness SA387Gr11Cl1 steel plate in this example has a thickness of 34mm, and its chemical composition and mass percentage are shown in Table 1.

[0033] The production method of the low-strength and high-toughness SA387Gr11Cl1 steel plate of this embodiment comprises steelmaking, heating, rolling, and heat treatment operations, and the specific process steps are as follows:

[0034] (1) Steelmaking process: LF seat bag feeds aluminum wire 0.75㎏ / t steel, controls Al: 0.025% in the whole process, maintains 17min in the VD vacuum process; maintains a large argon flow rate of 80NL / min for 11min, and maintains a minimum of 40NL / min in the later stage of vacuum. The flow of argon is maintained for 6 minutes; after vacuum, soft blowing is performed for 15 minutes, and the pressure of soft blowing is 0.28MPa;

[0035] (2) Billet heating process: the billet heating temperature is 1240°C, the heating coefficient is 10min / cm, and rolling is carried out...

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
tensile strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a low-strength and high tenacity SA387Gr11C11 steel plate and a production method thereof. The low-strength and high tenacity SA387Gr11C11 steel plate is prepared from the chemical components in percentage by mass: 0.09-0.12% of C, 0.05-0.60% of Si, 0.40-0.45% of Mn, less than or equal to 0.007% of P, less than or equal to 0.004% of S, 1.35-1.45% of Cr, 0.45-0.60% of Mo, 0.020-0.045% of Al, the balance of Fe and inevitable impurities. The production method comprises the steps of steelmaking, heating, rolling and heat treatment. According to the low-strength and high tenacity SA387Gr11C11 steel plate and the production method thereof, the steelmaking components are optimized and controlled accurately, a valuable alloy Ni element does not added, the contents of P andS elements are further reduced, the tempering embrittlement tendency of steel is reduced, a subcritical normalizing and high-temperature tempering technology is adopted in the heat treatment, producedsteel plates fully meet the requirements of steel plates for pressure containers, and the low-strength and high tenacity SA387Gr11C11 steel plate is suitable for manufacturing using of the pressure containers.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a low-strength and high-toughness SA387Gr11Cl1 steel plate and a production method thereof. Background technique [0002] SA387Gr11Cl1 steel is an American standard container steel. Because Cr and Mo elements are added to this steel at the same time, it has good high temperature performance and thermal strength performance. It is widely used in petroleum, coal chemical and petrochemical steel pipes as key materials. This steel belongs to American standard ASME SA387 / SA387M Class I steel has relatively low strength requirements. At the same time, there is an upper limit for yield and -20°C low temperature impact toughness steel plate for special requirements. The yield strength cannot meet the design requirements easily if the conventional production method is adopted. In the application number 201610376446.3 patent "SA387Gr11Cl1 steel plate for petrochemical pipeli...

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): C22C38/02C22C38/04C22C38/22C22C38/06C21D1/28C21D8/02
Inventor 李杰尹卫江龙杰袁锦程吴艳阳牛红星李样兵侯敬超王甜甜
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