A kind of n800cf steel for pumped storage pressure steel pipe and its manufacturing method
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 pumped storage and pressure steel, which is applied in the manufacture of converters, etc., can solve problems such as plasticity index and low-temperature impact performance gap, and achieve the effects of reducing the total oxygen content, refining the structure, and eliminating hazards
Active Publication Date: 2022-06-17
NANJING IRON & STEEL CO LTD
View PDF9 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, compared with foreign countries, domestic product quality is relatively close in terms of strength level, but there is still a certain gap in terms of plasticity index and low temperature impact performance.
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
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
[0025] The N800CF steel for pumped-storage pressure steel pipes provided in this embodiment has the following chemical composition and mass percentage: C: 0.075%, Si: 0.15%, Mn: 1.28%, P: 0.011%, S: 0.0020%, Ti : 0.016%, Cr: 0.23%, Ni: 0.43%, Mo: 0.13%, Cu: 0.03%, Al: 0.009%, Mg: 0.0012%, N: 0.0031%, and the balance is Fe and inevitable impurities.
[0026] The manufacturing method includes the following steps:
[0027] S1, adopt liquid lime to apply stirring method to carry out molten iron desulfurization, and after desulfurization is finished, slag is sloughed into converter for blowing;
[0028] S2, converter blowing, nickel and molybdenum alloys are added to the converter together with the self-produced scrap steel, and the converter tapping adopts the strong deoxidization mode for deoxidation, the aluminum content after the furnace is 0.035%, and the sulfur content is 0.006%;
[0029] S3. After the molten steel reaches the LF furnace, adjust the ladle bottom to blow argo...
Embodiment 2
[0035] The N800CF steel for pumped-storage pressure steel pipes provided in this example is different from Example 1 in that its chemical composition and mass percentage are as follows: C: 0.093%, Si: 0.26%, Mn: 1.42%, P: 0.013 %, S: 0.0020%, Ti: 0.012%, Cr: 0.29%, Ni: 0.48%, Mo: 0.23%, Cu: 0.03%, Al: 0.013%, Mg: 0.0013%, N: 0.0027%, the balance is Fe and inevitable impurities.
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
Login to view more
Abstract
The invention discloses N800CF steel for pumped storage pressure steel pipes and a manufacturing method thereof, and relates to the technical field of iron and steel production. Its chemical composition and mass percentage are as follows: C: 0.070%-0.10%, Si: 0.10%-0.30%, Mn : 1.20%~1.50%, P≤0.015%, S≤0.0050%, Ti: 0.006%~0.020%, Cr: 0.20%~0.30%, Ni: 0.40%~0.50%, Mo: 0.10%~0.30%, Cu ≤0.05%, Al: 0.005%~0.015%, Mg: 0.0008%~0.0015%, N≤0.0050%, the balance is Fe and unavoidable impurities. Stirring desulfurization, converter smelting, LF+RH refining, microalloying technology in the refining process reduces the size of inclusions, and nano-scale particles become austenite nucleation particles. After TMCP rolling and quenching and tempering, crystals are formed. The fine tempered sorbite structure can improve the strength and toughness of the steel plate and the welding requirements.
Description
technical field [0001] The invention relates to the technical field of iron and steel production, in particular to N800CF steel for pumped-storage pressure steel pipes and a manufacturing method thereof. Background technique [0002] With the transformation and development of the macro economy, clean energy is becoming more and more important to the sustainable development of the country. As a clean energy, hydropower has the characteristics of being renewable, non-polluting, low operating cost, and convenient for power peak regulation, which is conducive to improving resource utilization. Therefore, under the circumstance that traditional energy sources are increasingly tense, countries around the world generally give priority to the use of water resources and vigorously develop hydropower. In 2010, the number of hydropower stations built in my country exceeded 200 million kilowatts, and in 2020 it will reach 330 million kilowatts. With the acceleration of my country's hy...
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 
Login to view more