A thick-gauge low-alloy weather-resistant steel plate and its manufacturing method
A manufacturing method and low-alloy technology, applied in the field of weathering steel and its manufacturing, can solve the problems of high production cost and low-alloy weathering steel, and achieve the effects of good surface quality, lower alloy cost, and reduced usage
Active Publication Date: 2019-02-05
SHANGHAI MEISHAN IRON & STEEL CO LTD
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0005] The purpose of the present invention is to provide a thick-gauge low-alloy weather-resistant steel plate and its manufacturing method, which solves the technical problem of high production cost of the existing weather-resistant steel plate with a thickness of 10 mm to 19 mm
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
[0038] The present invention will be further illustrated below in conjunction with Examples 1 to 4, as shown in Tables 1 to 4:
[0039] Table 1 The chemical composition of the present invention (% by weight), the balance is Fe and unavoidable impurities.
[0040]
[0041] In Examples 1-4, the carbon equivalent values are 0.39, 0.39, 0.38, 0.40, respectively, and the carbon equivalent is based on Ceq=C+Mn / 6+(Cr+Mo+V) / 5+(Cu+Ni) / 15 Confirm that the content of Mo and V is taken as 0.
[0042] Using molten iron pre-desulfurization, converter top-bottom composite blowing, Ar blowing station (or LF furnace) to ensure that the molten steel of the above composition is obtained after bottom blowing Ar treatment, and continuous casting adopts full Ar blowing protection and casting into continuous casting slab.
[0043] After the continuous casting slab is reheated by the heating furnace, it is rolled on the continuous hot rolling mill. The rough rolling mill is used for rough rolling. The roug...
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 |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a thick-specification low-alloy weather-resistant steel plate and a manufacturing method thereof. A purpose of the present invention is to solve the technical problem of high production cost of the existing weather-resistant steel plate with the thickness of 10-19 mm. The chemical components of the thick-specification low-alloy weather-resistant steel plate comprise, by weight, 0.10-0.20% of C, less than or equal to 0.05% of Si, 0.35-0.45% of Mn, less than or equal to 0.025% of P, less than or equal to 0.008% of S, 0.25-0.35% of C, 0.7-0.85% of Cr, 0.01-0.02% of Ti, 0.055-0.08% of Sb, 0.015-0.05% of Alt, and the balance of iron and unavoidable impurity elements, wherein the contents of the elements must meet that the carbon equivalent value is less than or equal to 0.55%. The weather-resistant steel plate of the present invention can be used for the building structures, bridges, and large-sized steel structures.
Description
Technical field [0001] The invention relates to a weather-resistant steel plate and a manufacturing method thereof, in particular to a thick-gauge low-alloy weather-resistant steel plate and a manufacturing method thereof. Background technique [0002] Weathering steel has excellent atmospheric corrosion resistance, and can be painted under certain conditions, which greatly reduces the operation and maintenance costs of steel structures and has a significant environmental protection effect. Therefore, weathering steel has significant advantages compared with ordinary steel in the application of large steel structure projects such as bridges and building structures. [0003] The publication number is CN 1664152A, and the patent name is "A high-strength corrosion-resistant steel plate for railway vehicles and its preparation method". The chemical composition of the steel plate disclosed is C≤0.10%, Si≤2.00%, Mn≤2.00%, P≤0.040 %, S≤0.030%, Cr8.00-12.0%, Ni0.2-0.5%, the patented Cr 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): C22C38/60C21D8/02
Inventor 胡恒法张春一王运起贺应广
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD