Unlock instant, AI-driven research and patent intelligence for your innovation.

Technological method for controlling content of ferrite in austenitic stainless steel surfacing layer

A technology of austenitic stainless steel and surfacing layer, used in manufacturing tools, welding equipment, arc welding equipment, etc. The effect of improving corrosion resistance

Inactive Publication Date: 2015-04-01
上海锐迈重工有限公司 +2
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is not very effective and convenient to control the ferrite content by changing the welding parameters, etc.

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
  • Technological method for controlling content of ferrite in austenitic stainless steel surfacing layer
  • Technological method for controlling content of ferrite in austenitic stainless steel surfacing layer
  • Technological method for controlling content of ferrite in austenitic stainless steel surfacing layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for controlling the ferrite content of the austenitic stainless steel surfacing layer, using the GTAW surfacing method, using Ar and N 2 The mixed gas is used as the shielding gas, by controlling the N in the shielding gas 2 To control the ferrite content of the austenitic stainless steel surfacing layer, when it is necessary to increase the ferrite content of the austenitic stainless steel surfacing layer, reduce the N in the shielding gas 2 When it is necessary to reduce the ferrite content of the austenitic stainless steel surfacing layer, increase the N in the shielding gas 2 content.

[0020] The GTAW surfacing method is as follows: prepare 5 seamless pipes with a specification of 4”×Sch80s, a base material of ASTM A106, a length of 200mm, and a diameter of Φ114.3mm, and preheat according to the specifications in Table 1-Table 5. Parameters GTAW-P-hot wire surfacing welding, current type is DCEN (direct current positive connection), straight welding, sin...

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

No PUM Login to View More

Abstract

The invention provides a method for controlling the content of ferrite in an austenitic stainless steel surfacing layer. The method is characterized by comprising the steps of adopting a GTAW surfacing method, taking mixed gas of Ar and N2 as protective gas, controlling the content of the ferrite in the austenitic stainless steel surfacing layer by controlling the content of N2 in the protective gas, wherein the content of N2 in the protective gas is reduced when the content of the ferrite in the austenitic stainless steel surfacing layer needs to be increased, and the content of the N2 in the protective gas is increased when the content of the ferrite in the austenitic stainless steel surfacing layer needs to be lowered. By adopting the method, the content of the ferrite in the austenitic stainless steel surfacing layer can be simply and effectively controlled.

Description

technical field [0001] The invention relates to a process method for controlling the ferrite content of an austenitic stainless steel surfacing layer. technical background [0002] Surfacing austenitic stainless steel, as an economical and rapid process to change the corrosion resistance of the material surface, has been widely used in various industries. Under normal circumstances, the ferrite content in austenitic stainless steel has both positive and negative effects. When industrial parts loaded with different media are surfacing welding austenitic stainless steel, different δ ferrite content will be required to be controlled. From the perspective of welding, it is better to require the content of ferrite to be greater than 3%. From the perspective of corrosion resistance, it is better to have a δ ferrite content of less than 8% in general media; but in media such as urea, it is better to have a content of less than 0.5%. From the perspective of mechanical properties, e...

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): B23K9/04B23K9/23B23K9/16B23K103/02
CPCB23K9/04B23K9/167B23K9/23B23K2103/02
Inventor 何翔张政王磊张振民卢佳
Owner 上海锐迈重工有限公司
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