Hot-rolled round bar for high-pressure oil pipe and manufacturing method

A technology of a high-pressure oil pipe and a manufacturing method, which is applied in the field of hot-rolled round steel for high-pressure oil pipe and its manufacturing field, can solve the problem that the high-pressure oil pipe cannot be satisfied.

Active Publication Date: 2014-11-12
江苏耀坤液压股份有限公司
View PDF3 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydraulic oil pipes are divided into low-pressure, medium-pressure and high-pressure. The existing high-pressure oil pipes generally use steel pipes, but ordinary steel cannot meet the requirements of high-pressure oil pipe steel for high-pressure resistance, corrosion resistance, and wear resistance.

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
  • Hot-rolled round bar for high-pressure oil pipe and manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] The specific implementation of the present invention will be further described below in conjunction with the examples. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0020] A hot-rolled round steel for high-pressure oil pipes, the chemical composition (smelting composition) mass percentage (wt%) is: C: 0.10 ~ 0.17%, Si: 0.25 ~ 0.45%, Mn: 1.30 ~ 1.60%, P≤0.020% , S≤0.010%, Cr: 0.20 ~ 0.40%, V: 0.05 ~ 0.10%, Al: 0.025 ~ 0.050%, Cu: ≤0.20%, Ni≤0.20%, and the rest is iron and residual trace impurities.

[0021] Preferably, the carbon equivalent of the hot-rolled round steel for high-pressure oil pipes Cev=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15≤0.48%.

[0022] Preferably, the hot-rolled round steel for high-pressure oil pipes contains an appropriate amount of Nb and Ni fine particles.

[0023] A method for manufacturing hot-rolled round steel for high-...

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 present invention discloses a hot-rolled round bar for a high-pressure oil pipe and a manufacturing method of the hot-rolled round bar. The hot-rolled round bar comprises the following chemical components (smelting components) in percentage by mass (wt%): 0.10-0.17% of C, 0.25-0.45% of Si, 1.30-1.60% of Mn, less than or equal to 0.020% of P, less than or equal to 0.010% of S, 0.20-0.40% of Cr, 0.05-0.10 % of V, 0.025-0.050% of Al, less than or equal to 0.20% of Cu, less than or equal to 0.20% of Ni and the balance of iron and residual trace impurities. By virtue of controlling the appropriate ratio of each element in steel, and adopting heat treatment methods, such as EAF electric furnace smelting, LF refining and VD vacuum degassing, the structure of the hot-rolled round bar,with uniform fine sorbite and bainite metallographic structures, can be obtained and thus the hot-rolled round bar for the high-pressure oil pipe with the advantages of high pressure resistance, corrosion resistance and wear resistance is obtained.

Description

technical field [0001] The invention relates to a hot-rolled round steel for high-pressure oil pipes and a manufacturing method thereof. Background technique [0002] As we all know, the hydraulic oil pipe is the channel of the stained liquid of various construction machinery, and it is an indispensable part of every construction machinery. The hydraulic oil pipe connects the hydraulic components of the machine to ensure the circulation of the working fluid of the hydraulic system and the transmission and output of mechanical energy, so as to achieve the purpose of agile and flexible operation of various construction machinery. Hydraulic oil pipes are divided into low-pressure, medium-pressure and high-pressure. Existing high-pressure oil pipes generally use steel pipes, but ordinary steel cannot meet the requirements of high-pressure oil pipe steel for high-pressure resistance, corrosion resistance, and wear resistance. The prior art is badly in need of a high-pressure res...

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): C22C38/58C22C38/46C22C38/38C22C38/24C22C33/04C21D8/00
Inventor 陈建新郁智锋周锋杨锡强朱仁海
Owner 江苏耀坤液压股份有限公司
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