Method for smelting large energy input welded pipeline steel
A technology of large heat input welding and smelting methods, applied in the field of pipeline steel smelting, can solve the problems of smelting process details and deoxidation alloying control methods that have not been reported publicly, complex smelting and deoxidation alloying processes, etc., to reduce production costs , Improve the quality pass rate, improve the effect of strength and toughness
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
Embodiment 1
[0013] A method for smelting pipeline steel welded with large heat input: Weak deoxidation with barium-silicon alloy, ferrosilicon alloy and ferromanganese alloy in the process of tapping the converter-LF furnace white slag-RH vacuum carbon deoxidation-LF refining deep desulfurization-titanium Alloying iron and boron-iron-calcium treatment of molten steel-low superheat casting, that is, pipeline steel slabs welded with large input energy. In the smelting process of this embodiment: control the acid-soluble aluminum content in molten steel at 0.0015% to 0.0020% during weak deoxidation; control the dissolved oxygen content in molten steel at 0.0015% to 0.0020% during RH vacuum carbon deoxidation; Medium titanium / aluminum mass ratio ≥10.
[0014] The main chemical components of the pipeline steel obtained by the method described in this example are: w(C) 0.04%~0.06%, w(S)≤0.003%, w(P)≤0.003%, w(Si)0.2%~ 0.4%, w(Mn)1.8%~2.0%, w(N)≤0.005%, w(B)0.001%~0.0015%, w(Ti)0.020%~0.025%, w...
Embodiment 2
[0016] A method of smelting pipeline steel welded with large heat input: Weak deoxidation with silicon-barium alloy, silicon-manganese alloy and ferromanganese alloy in the process of tapping the converter-LF furnace white slag-RH vacuum carbon deoxidation-LF refining deep desulfurization-titanium Alloying iron and boron-iron-calcium treatment of molten steel-low superheat casting, that is, pipeline steel slabs welded with large input energy. In the smelting process of this embodiment: control the acid-soluble aluminum content in molten steel at 0.0010% to 0.0015% during weak deoxidation; control the dissolved oxygen content in molten steel at 0.0020% to 0.0030% during RH vacuum carbon deoxidation; Medium titanium / aluminum mass ratio ≥10.
[0017] The main chemical components of the pipeline steel obtained by the method are: w(C)0.04%~0.06%, w(S)≤0.003%, w(P)≤0.003%, w(Si)0.2%~0.4%, w(Mn)1.8%~2.0%, w(N)≤0.005%, w(B)0.001%~0.0015%, w(Ti)0.015%~0.020%, w(O)0.0020%~0.0030%, w( ...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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