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

Pipeline steel and its ingredient control method

A control method and technology for pipeline steel, applied in the field of pipeline steel and its alloy composition control during its smelting process, can solve problems such as not described in detail, and achieve optimization of production process, reduction of aluminum alloy consumption, reduction of production cost and refractory material. The effect of consumption

Inactive Publication Date: 2009-04-29
ANGANG STEEL CO LTD
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific methods and operating procedures are not described in detail

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

[0024] Embodiment, its composition mass percent is:

[0025] C 0.05, Si 0.25, Mn 1.63, P≤0.012, S≤0.002, Nb 0.055, V 0.05, Ti 0.015, Mo 0.25, Ni 0.20, Cu 0.20, Als 0.025, N≤0.006, B≤0.0004.

[0026] The process route is: molten iron pretreatment—converter smelting—argon station refining—RH refining—LF refining—feeding Si-Ca line—continuous casting

[0027] Hot metal pretreatment: adopt deep desulfurization, the target of desulfurized hot metal is ≤0.002%, and remove the molten iron slag.

[0028] Converter smelting: special steel scrap with low residual element content is used for steel scrap. Mo-Fe, Cu plates and Ni plates are added into the furnace in advance, the end point control C: 0.05-0.08%, the temperature is 1660-1680 °C; and then blow once more (time less than 1 minute) to tap the steel. During the tapping process, only alloying of Mn is carried out, and the addition of aluminum is prohibited; the addition of manganese alloy is based on 100% alloy yield and the res...

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 relates to a conduit wiring steel and the method for controlling its component, belonging to X70 and conduit wiring steel over this grade and the method for increasing component hit ratio during smelting process. The comprised component and their proportion by weight are as follows: C 0.03- 0.06, Si 0.15-0.30, Mn 1.52-1.68, P<=0.018, S<=0.003, Nb0.05-0.07, V 0.04- 0.06, Ti 0.007-0.024, Mo 0.24-0.29, Ni 0.17-0.22, Cu 0.17-0.22, Als 0.01- 0.045, N<=0.008 and B<=0.005. The process route is as follows: bessemerizing- argon station- RH refining- LF refining- continuous casting- cleaning. The invention combines target component rationally, improves alloying way, controllign component in each process, and stablizes steel component based on reducing production cost and material consumption resistant, and makes comprehensive hit ratio of X70 and conduit wiring steel over this grade reach 100%.

Description

technical field [0001] The invention relates to a pipeline steel and a method for controlling its composition, in particular to a pipeline steel and a method for controlling its alloy composition in the smelting process. Background technique [0002] Pipeline steel is mainly used in the manufacture of crude oil and natural gas pipelines. Due to its special use conditions, the comprehensive properties of steel such as strength, impact toughness, hydrogen-induced cracking (HIC) resistance, H 2 S corrosion resistance, fatigue strength and welding performance have high requirements. [0003] In order to ensure the comprehensive performance of pipeline steel and meet the growing demand for pipeline steel, the manufacturers adopt decarburization and low-carbon tapping methods in the smelting process to improve the toughness and ductility of pipeline steel. Because C is the most economical and effective element to improve the strength of steel, but the increase of C content will r...

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 Patents(China)
IPC IPC(8): C22C38/16C21C7/00
Inventor 辛国强李伟东孙群温铁光王荣方恩俊王向辉梁祥远
Owner ANGANG STEEL CO LTD
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