Improved oblique-Y-shaped groove welding crack sensitivity test sample and manufacturing method thereof

A crack sensitivity and groove welding technology, which is applied in the field of metal material welding, can solve the problems that affect the accurate evaluation of material welding crack sensitivity, the root gap is difficult to effectively guarantee, and the impact of crack sensitivity, etc., to reduce human and financial resources consumption, Efficiency and quality improvement, the effect of improving accuracy

Active Publication Date: 2017-06-13
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF7 Cites 22 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

my country is currently the number one country in the world's steel production and application. This method is used to conduct a large number of material weldability tests every year. figure 1 It is the shape and size of the test piece stipulated in the standard of this test method. An obvious shortcoming of this method is that it is difficult to effectively guarantee the root gap (2mm±0.2mm) during the test piece manufacturing process, and the root gap reflects the degree of restraint, which is a part of the test process. An important parameter that has a significant impact on crack susceptibility
Generally, the method of adding 2mm iron sheet at the root and the method of reserving an excessive gap are used to make the test pieces. Even so, many test pieces are abolished because they do not meet the dimensional accuracy requirements. For this reason, the invention patent with the application number 201510244559.3 and the application number 201510012348.7 The inven

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
  • Improved oblique-Y-shaped groove welding crack sensitivity test sample and manufacturing method thereof
  • Improved oblique-Y-shaped groove welding crack sensitivity test sample and manufacturing method thereof
  • Improved oblique-Y-shaped groove welding crack sensitivity test sample and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 traditional mechanical method processing

[0027] 1) Mark the line to determine the position of the weld bevel in the processing test;

[0028] 2) First use a 2mm end mill to process a rectangular groove with a width of 2mm on the upper half of the specimen along the thickness direction, such as Figure 4 a; then the test piece is horizontally inclined by 30°, and a groove surface is processed on one side of the rectangular groove with the end mill, and the bottom edge of the groove surface coincides with the axial bottom edge of the rectangular groove, such as Figure 4 b; After completion, use the same method to process the groove surface on the other side to obtain a V-shaped groove, such as Figure 4 c;

[0029] 3) EDM is used to process the gap groove in the lower half of the test piece along the thickness direction, or the test piece is tilted 30° horizontally and a 2mm end mill is used to process the gap groove in the lower half of the test piece a...

Embodiment 2

[0031] Embodiment 2 CNC machine tool processing

[0032] 1) On the CNC machine tool, select the processing mode of small cutter head, small feed rate, and high-speed rotation, and formulate the program for processing the test weld bevel according to the operation steps in Example 1;

[0033] 2) Clamping the specimen;

[0034] 3) Process the test piece according to the program;

[0035] 4) Grind the irregularities and burrs of the corners by manual rubbing and grinding, and check to ensure the dimensional accuracy.

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
Angleaaaaaaaaaa
Weld lengthaaaaaaaaaa
Login to view more

Abstract

The invention discloses an improved oblique-Y-shaped groove welding crack sensitivity test sample and a manufacturing method thereof. The sample comprises a test welding line located in the middle of the sample and does not include a restraint welding line, wherein a groove applied to the test welding line is oblique-Y-shaped; the root gap of the groove is 2mm+/-0.1mm. Through the sample, the restraint welding line is eliminated; the groove applied to the test welding line and the root gap are directly processed in the middle of the sample by using a mechanical method; the accuracy of the root gap can be greatly improved; residual stress and angular deformation are not generated; the reliability of test result of welding crack sensitivity of the material is improved; meanwhile, the consumption of manpower and financial resources can be reduced.

Description

technical field [0001] The invention belongs to the technical field of metal material welding, and in particular relates to an improved inclined Y-shaped groove welding crack sensitivity test specimen and a manufacturing method thereof. Background technique [0002] Steel materials are widely used in petroleum, chemical, nuclear power, marine engineering and other industrial fields, and a large amount of steel is applied by welding. Whether a material can be welded, and how it performs after welding, that is, weldability, is an important direction for materials research. Among the weldability test methods of steel materials, the most widely used is the small iron research test, that is, the oblique Y-shaped groove welding crack test method, which was once formulated as the national standard GB 4675.1-84 "Weldability Test Oblique Y-shaped slope Welding Crack Test Method", which was abolished in 2005, and the relevant content was incorporated into the new national standard GB...

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
IPC IPC(8): G01N1/28
CPCG01N1/286
Inventor 李为卫池强吉玲康宫少涛贾君君杨扬许晓锋
Owner BC P INC CHINA NAT PETROLEUM CORP
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