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

High-temperature tensile test method for high-strength low-alloy weather-resistant structural steel

A high-strength, low-alloy, weathering structural steel technology, applied in the testing of machine/structural components, strength characteristics, and testing of mechanical components, etc. problems, to achieve consistent data results, simple and convenient test methods

Active Publication Date: 2021-01-29
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This situation can easily mislead the tester, thinking that there is a discontinuous yielding situation. Because the process of work hardening transitions to work softening is very fast, the tester often has no time to make a judgment, so the speed change cannot be performed at the most reasonable position.
The numerical value of the tensile strength is unstable due to the large range of selectable transmission ranges
As an important mechanical performance index, the inaccurate determination of tensile strength directly affects the application of high-strength low-alloy weather-resistant structural steel materials in actual engineering, and even affects scientific research personnel's judgment on materials.

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
  • High-temperature tensile test method for high-strength low-alloy weather-resistant structural steel
  • High-temperature tensile test method for high-strength low-alloy weather-resistant structural steel
  • High-temperature tensile test method for high-strength low-alloy weather-resistant structural steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a high-temperature tensile test method for the tensile strength of high-strength low-alloy weather-resistant structural steel, specifically: when the material undergoes a relatively long work-hardening condition, select the speed change when the displacement reaches 5% of the length of the parallel section ; The length of the parallel section is 30mm; the shifting position is 1.5mm;

[0023] Further, the test temperature of the tensile test is 650°C;

[0024] Using SHIMADZU AG-X250KN testing machine;

[0025] Further, the displacement rate of the beam before yielding is 0.15 mm / min, and the displacement rate of the beam after yielding is 2.5 mm / min.

[0026] Further, the high-strength low-alloy weather-resistant structural steel is: S355J2W.

[0027] see figure 1 , it can be observed that the tensile strength value R obtained by changing the speed at this position m It is 148MPa, and changing the test rate at this position will obtain a sta...

Embodiment 2

[0029] This embodiment provides a high-temperature tensile test method for the tensile strength of high-strength low-alloy weather-resistant structural steel, specifically: when the material undergoes a relatively long work-hardening condition, the speed change is selected when the displacement reaches 8.3% of the length of the parallel section ; The length of the parallel section is 30mm; the shifting position is 2.5mm;

[0030] Further, the test temperature of the tensile test is 650°C;

[0031] Using SHIMADZU AG-X250KN testing machine;

[0032] Further, the displacement rate of the beam before yielding is 0.15 mm / min, and the displacement rate of the beam after yielding is 2.5 mm / min.

[0033] Further, the high-strength low-alloy weather-resistant structural steel is: S355J2W.

[0034] see figure 2 , it can be observed that the tensile strength value R obtained by changing speed at this position m It is 145MPa, and changing the test rate at this position will obtain a ...

Embodiment 3

[0036] This embodiment provides a high-temperature tensile test method for the tensile strength of high-strength low-alloy weather-resistant structural steel, specifically: when the material undergoes a relatively long work-hardening condition, select to change the speed when the displacement reaches 10% of the length of the parallel section; The length of the parallel section is 30mm; the shift position is 3.0mm;

[0037] Further, the test temperature of the tensile test is 650°C;

[0038] Using SHIMADZU AG-X250KN testing machine;

[0039] Further, the displacement rate of the beam before yielding is 0.15 mm / min, and the displacement rate of the beam after yielding is 2.5 mm / min.

[0040] Further, the high-strength low-alloy weather-resistant structural steel is: S355J2W.

[0041] see image 3 , it can be observed that the tensile strength value R obtained by changing speed at this position m It is 145MPa, and changing the test rate at this position will obtain a stable a...

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
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
tensile strengthaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of high-temperature static-load tensile tests of metal materials, and aims to provide a high-temperature tensile test method for high-strength low-alloy weathering-resistant structural steel, which comprises the following steps: when a material generates short work hardening and long work softening conditions, changing the speed in an interval of which the displacement reaches 5-10% of the length of a parallel section; wherein the test temperature of the tensile test is 650 DEG C; the displacement rate of a cross beam before yielding is 0.15 mm / min, and the displacement rate of the cross beam after yielding is 2.5 mm / min; and the high-strength low-alloy weather-proof structural steel is S355J2W. According to the invention, the problems of consistent testrate and large tensile strength value difference of high-strength low-alloy weather-resistant structural steel during high-temperature stretching at 650 DEG C are solved. Under a certain given rate condition, the speed change position after yielding is further determined, so that stable and real tensile strength is obtained.

Description

technical field [0001] The invention relates to the field of high-temperature static load tensile tests of metal materials, and aims to provide a high-temperature tensile test method for high-strength low-alloy weather-resistant structural steel. Background technique [0002] S355J2W high-strength low-alloy weather-resistant structural steel is a European standard hot-rolled structural steel product, used for medium and low pressure containers, oil tanks, vehicles, cranes, mining machinery, power stations, bridges and other dynamic load-bearing structures, mechanical parts, building structures, General metal structural parts, my country's high-speed train bogies also use this material. [0003] Tensile strength (R m ) is one of the important indicators of the mechanical properties of materials, and it is the critical value for metals to transition from uniform plastic deformation to local concentrated plastic deformation, and it is also the maximum bearing capacity of metals...

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): G01N3/08G01M13/00
CPCG01N3/08G01M13/00G01N2203/0017G01N2203/0075G01N2203/0226G01N2203/0676
Inventor 袁晨蔡静李红军时园园关辉商宁波蔡林侯瑞王健张重远
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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