Supercharge Your Innovation With Domain-Expert AI Agents!

Welding method for medium steel plates for boilers

A welding method and thick steel plate technology, applied in the mechanical field, can solve the problems of unfused, cold cracked joints, poor weldability, etc., and achieve the effects of qualified mechanical properties, guaranteed welding quality, and reduced deformation

Active Publication Date: 2017-01-11
GUANGXI UNIV
View PDF9 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weldability of these medium-thick steel plates is poor. The selection of the welding groove and the welding process are the key steps in its welding. If the groove opening is unreasonable and the welding parameters are not selected properly during welding, it will lead to incomplete fusion, Problems such as cold cracks and joint embrittlement

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

[0021] In an embodiment of the present invention, a method for welding medium-thick steel plates for boilers comprises the following steps:

[0022] (1) The thickness of the steel plate is 60mm, and the steel plates of the same thickness are butted, and three semicircular grooves are respectively set on the corresponding positions of the two medium-thick steel plates to be welded, so that the butt joints form three complete circular grooves; Semicircular grooves are evenly distributed on the butt joint surfaces of two medium-thick steel plates to be welded, and their diameter is 1.05 times the maximum linear distance of the heat-affected zone of the medium-thick steel plates;

[0023] (2) Pre-welding: first preheat the two medium-thick steel plates to be welded, the preheating temperature is ≥190°C, and then weld the two ends of the two medium-thick steel plates so that the corresponding semicircular grooves are firmly connected to each other;

[0024] (3) Welding: adopt the s...

Embodiment 2

[0026] In an embodiment of the present invention, a method for welding medium-thick steel plates for boilers comprises the following steps:

[0027] (1) The thickness of the steel plate is 80mm, and the steel plate of the same thickness is butted, and 6 semi-circular grooves are respectively arranged on the corresponding positions of the two butt-joined medium-thick steel plates to be welded, so that the butt joints form 6 complete circular grooves; Semicircular grooves are evenly distributed on the butt joint surfaces of two medium-thick steel plates to be welded, and their diameter is 1.1 times the maximum linear distance of the heat-affected zone of the medium-thick steel plates;

[0028] (2) Pre-welding: first preheat the two medium-thick steel plates to be welded, the preheating temperature is ≥190°C, and then weld the two ends of the two medium-thick steel plates so that the corresponding semicircular grooves are firmly connected to each other;

[0029] (3) Welding: adop...

Embodiment 3

[0031] In an embodiment of the present invention, a method for welding medium-thick steel plates for boilers comprises the following steps:

[0032] (1) The thickness of the steel plate is 70mm, and the steel plate of the same thickness is butted, and 5 semicircular grooves are respectively set on the corresponding positions of the two butted medium-thick steel plates to be welded, so that they are butted to form 5 complete circular grooves; Semicircular grooves are evenly distributed on the butt joint surfaces of two medium-thick steel plates to be welded, and their diameter is 1.05 times the maximum linear distance of the heat-affected zone of the medium-thick steel plates;

[0033] (2) Pre-welding: first preheat the two medium-thick steel plates to be welded, the preheating temperature is ≥190°C, and then weld the two ends of the two medium-thick steel plates so that the corresponding semicircular grooves are firmly connected to each other;

[0034] (3) Welding: use stagger...

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
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a welding method for medium steel plates for boilers. The method includes the steps that 1, the thickness of the steel plates is 60-80 mm, the mode of connecting the steel plates with the same thickness in a butted mode is adopted, and at least three half-round grooves are formed in corresponding positions of two butted medium steel plates to be welded and form round grooves in a butted mode; 2, pre-welding is carried out, the two medium steel plates to be welded are preheated, and then the two ends of the two medium steel plates are welded so that the corresponding half-round grooves can be connected firmly; and 3, welding is carried out, the zigzag welding mode of welding from one end of the butt joint surface to the other end and then to the start end is adopted, back chipping is carried out on the back surfaces of butt welding connection points, shielded metal arc welding is adopted in welding and finally post heat treatment is carried out. According to the method, to-be-welded surfaces of the two medium steel plates are divided into at least four sections through the half-round grooves, then deformation of non-thermal effect areas of the medium steel plates is reduced to the minimum degree through spaced zigzag welding, and therefore the mechanical property of all areas of welded joints can be guaranteed to be qualified.

Description

technical field [0001] The invention relates to the field of mechanical technology, in particular to a welding method for medium-thick steel plates for boilers. Background technique [0002] The boiler is a kind of energy conversion equipment. The energy input to the boiler includes chemical energy and electric energy in the fuel, and the boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of heat energy. The original meaning of the pot refers to the water container heated on the fire, and the furnace refers to the place where fuel is burned. The boiler includes two parts: the pot and the furnace. The hot water or steam generated in the boiler can directly provide the required heat energy for industrial production and people's life, and can also be converted into mechanical energy through a steam power device, or converted into electrical energy through a generator. Boilers that provide hot water are called hot water boilers, which are...

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): B23K9/235B23K9/23B23K9/00
CPCB23K9/00B23K9/23B23K9/235
Inventor 史宝华
Owner GUANGXI UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com