A kind of ultra-low temperature weather-resistant structural steel plate and its production method
A technology of structural steel plate and production method, applied in the field of ultra-low temperature weathering structural steel plate and its production, can solve problems such as unfavorable welding process performance and the like
Active Publication Date: 2016-02-24
LAIWU STEEL YINSHAN SECTION CO LTD
View PDF8 Cites 5 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The atmospheric corrosion resistance of the steel plate is improved by adding Cu, Ni, and Cr, and the strength of the steel plate is improved by adding Nb, Ti, and V microalloying. This invention adds more corrosion-resistant elements Cu, Ni, Cr, and microalloy The chemical elements Nb, Ti, and V increase the carbon equivalent, which is not conducive to the performance of the welding process, and does not involve the impact performance of ultra-low temperature -60°C
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0010] In order to solve the above problems, the present invention provides an ultra-low temperature weather-resistant structural steel plate. The composition of the steel plate is: C: 0.07%~0.10%, Si: ≤0.40%, Mn: ≤1.00%, P: ≤0.020 %, S: ≤0.005%, Cu: 0.25%~0.45%, Cr: 0.40%~0.70%, Ni: 0.15%~0.25%, Nb: 0.015%~0.030%, Ti: 0.020%~0.035%, Al: ≥0.020%, Ca: 0.001%~0.005%, the balance is Fe and unavoidable impurities.
[0011] The term "ultra-low temperature" in the present invention refers to a temperature of -60°C.
[0012] Preferably, in order to ensure the excellent comprehensive performance of the steel plate, the composition of the steel plate should meet the following requirements at the same time:
[0013] CEV=C+Mn / 6+(Cr+Mo+V) / 5+(Ni+Cu) / 15≤0.40%, to ensure that the steel plate has good welding performance;
[0014] Mn / C ≥ 10, to ensure that the grains of the steel plate are uniform and fine, and to ensure good ultra-low temperature toughness;
[0015] Ti / N≥3.4, preferably 4...
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
| Property | Measurement | Unit |
|---|---|---|
| yield strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| elongation | aaaaa | aaaaa |
Login to View More
Abstract
The present invention provides an ultra-low temperature weather-proof structural steel plate and a production method thereof. The steel plate includes the components by weight: 0.07-0.10% of C, no more than 0.40% of Si, no more than 1.00% of Mn, no more than 0.020% of P, no more than 0.005% of S, 0.25-0.45% of Cu, 0.40-0.70% of Cr, 0.15-0.25% of Ni, 0.015-0.030% of Nb, 0.020-0.035% of Ti, no less than 0.020% of Al, 0.001-0.005% of Ca, and the balance Fe and unavoidable impurities. The steel plate provided by the invention has yield strength no less than 450MPa, tensile strength no less than 560MPa, elongation no less than 27%, and -60 DEG C impact energy no less than 155J.
Description
technical field [0001] The invention relates to an ultra-low temperature weather-resistant structural steel plate and a production method thereof. Background technique [0002] When steel materials are exposed to the air, the corrosion caused by the chemical and electrochemical effects of water and oxygen in the air is called atmospheric corrosion of steel. It is a common corrosion phenomenon, and the resulting economic loss accounts for more than half of the total steel corrosion loss. Therefore, atmospheric corrosion-resistant (weather-resistant) structural steel plates have attracted more and more attention. As a high-efficiency steel, weather-resistant structural steel plates can withstand harsh service conditions such as wind, rain, sun exposure, and large temperature changes, and the longer the service time, the more prominent the corrosion resistance. Weather-resistant structural steel plates are increasingly being used in industries such as construction, bridges, co...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C21D8/02
Inventor 李生根王月香周平杨娜高立福李灿明
Owner LAIWU STEEL YINSHAN SECTION CO LTD