Unlock instant, AI-driven research and patent intelligence for your innovation.
Production method of easy-to-weld and form wear-resistant steel plate
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of wear-resistant steel plate and production method, which is applied in the field of steelmaking, can solve problems such as not involving wear-resistant steel plates, and achieve the effect of low alloy cost and ensuring grain refinement.
Active Publication Date: 2021-10-19
HUNAN VALIN XIANGTAN IRON & STEEL CO LTD
View PDF9 Cites 5 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0023] Embodiment one: the production of 25mmNM360 steel plate
[0024] The weight percentage of chemical composition of steel is: C=0.16, Si=0.45, Mn=1.42, P=0.013, S=0.0021, Nb=0.003, V=0.003%, Ti=0.015, Als=0.031, Cr=0.02, Mo =0.01%, Ni=0.02, B=0.0015, CEV=0.41, the balance is Fe and other trace elements; Nb+V+Ti=0.021, Cr+Mo+Ni=0.05.
[0025] Key process steps include:
[0026] (1) Rolling: the slab heating temperature is 1165°C, the soaking time is 33min; the reduction rate of the three passes at the end of rough rolling is 18.5%, 23.2% and 27.5%; The final rolling temperature is 840~870℃; the three-pass reduction rate in the finishing rolling stage is 18.5%, 19.2% and 20.1%;
[0030] Embodiment two: the production of 45mmNM360 steel plate
[0031] The weight percentage of chemical composition of steel is: C=0.17, Si=0.47, Mn=1.47, P=0.011, S=0.0023, Nb=0.004, V=0.002%, Ti=0.018, Als=0.035, Cr=0.03, Mo =0.02, Ni=0.01, B=0.0017, CEV=0.43, the balance is Fe and other trace elements; Nb+V+Ti=0.024, Cr+Mo+Ni=0.06.
[0032] Key process steps include:
[0033] (1) Rolling: the slab heating temperature is 1173°C, the soaking time is 35min; the reduction rate of the three passes at the end of rough rolling is 18.1%, 22.7% and 26.8%; The final rolling temperature is 835~865℃; the three-pass reduction rate in the finishing rolling stage is 18.7%, 19.0% and 19.5%;
[0034] (2) On-line quenching: cooling in water directly after rolling, the cooling temperature is 800~830°C, and the water volume in the high pressure zone is 130L / s / m 2 , the water volume in the low pressure area is 500L / s / m 2 , roll speed 0.4m / s, red return temperature ≤200℃;
[0035] (3) Tem...
Embodiment 3
[0037] Embodiment three: the production of 25mmNM400 steel plate
[0038]The chemical composition weight percentage of steel is C=0.19, Si=0.52, Mn=1.53, P=0.012, S=0.0023, Nb=0.004, V=0.002%, Ti=0.017, Als=0.037, Cr=0.03, Mo= 0.03, Ni=0.01, B=0.0017, CEV=0.46, the balance is Fe and other trace elements; Nb+V+Ti=0.023, Cr+Mo+Ni=0.07.
[0039] Key process steps include:
[0040] (1) Rolling: The slab heating temperature is 1180°C, and the soaking time is 40 minutes; the reduction ratios of the three passes at the end of rough rolling are 19.2%, 22.7% and 28.3%; The final rolling temperature is 820~850℃; the three-pass reduction ratio in the finishing rolling stage is 18.5%, 19.2% and 20.1%.
[0041] (2) On-line quenching: direct water cooling after rolling, the cooling temperature is 780~820°C, and the water volume in the high pressure zone is 130L / s / m 2 , the water volume in the low pressure area is 500L / s / m 2 , Roll speed 0.4m / s, redness temperature ≤200℃.
[0042] (3) T...
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
tensile strength
aaaaa
aaaaa
tensile strength
aaaaa
aaaaa
thickness
aaaaa
aaaaa
Login to View More
Abstract
The invention discloses a production method of an easy-to-weld and form wear-resistant steel plate. The production process route of steel comprises the following steps of molten iron pretreatment, converter smelting, LF external refining, VD vacuum treatment, continuous casting, heating, rolling, straightening, online quenching, tempering, finishing, performance inspection and flaw detection, the steel comprises the following chemical components of, in percentage by weight, 0.15 to 0.20 percent of C, 0.40 to 0.60 percent of Si, 1.30 to 1.60 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.005 percent of S, less than or equal to 0.005 percent of Nb, 0.010 to 0.025 percent of Ti, greater than or equal to 0.020 percent of Als, 0.0008 to 0.0025 percent of B, less than or equal to 0.48 percent of CEV, and the balance Fe and other trace elements, wherein CEV equals C + Mn / 6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15, Nb + V + Ti is less than or equal to 0.035, and Cr + Mo + Ni is less than or equal to 0.10. The invention provides the production method of the NM360 and NM400 which have better bending performance and are easy to weld, the alloy content is low, the off-line quenching process is omitted, energy is saved, the environment is protected, and the production cost is low.
Description
technical field [0001] The invention belongs to the technical field of steelmaking, and relates to a production method of an easy-to-weld and easy-to-form wear-resistant steel plate. Background technique [0002] Wear-resistant steel is a steel material suitable for various wear conditions. In recent years, the low-alloy wear-resistant steel that has been continuously developed is widely used in coal mine machinery and construction machinery, such as excavators, loaders, crushers, and ore transport vehicles. equipment field. Low-alloy martensitic wear-resistant steel generally needs to add alloy elements such as Cr, Mo, Ni, etc., and obtain tempered martensite structure through quenching and low-temperature tempering. In order to improve the hardness performance, increasing the content of carbon and alloying elements has become the most common method, but it is accompanied by an increase in carbon equivalent, which seriously affects the toughness, plasticity and weldability...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More