Steel for economical MPM continuous-rolled core rod and manufacturing method thereof
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 manufacturing method and an economical technology, applied in the field of alloy steel, can solve the problems of large inventory occupation, long manufacturing cycle, and impact, and achieve the effect of reducing alloy cost, good thermal fatigue performance, and low cost ratio
Active Publication Date: 2016-10-05
宝武特种冶金有限公司
View PDF7 Cites 1 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
At present, the production of mandrels in the world is only in the hands of a few companies, which are in a monopoly position. Not only is the price much higher
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
[0048] According to the formula batching of table 5, control C is 0.36%, Si is 1.12%, Mn is 0.99%, P is 0.025%, S is 0.018%, Cr is 5.48%, Mo is 0.31%, Ti is 0.11%, Nb is 0.018%, B 0.0038%, and the rest are iron and unavoidable impurities.
[0049] Electrode rods are smelted in a vacuum induction furnace, and then electroslag remelting is performed on the electrode rods. The weight of the electroslag ingot is 0.5t, and the electroslag ingot is heated and forged into a forging billet with a cross-sectional area of 100mm×100mm.
Embodiment 2
[0051] According to the formula batching of table 5, control C is 0.39%, Si is 1.0%, Mn is 0.85%, P is 0.018%, S is 0.011%, Cr is 4.89%, Mo is 0.48%, Ti is 0.17%, Nb is 0.014%, B 0.0029%, and the rest are iron and unavoidable impurities.
[0052] Electrode rods are smelted in a vacuum induction furnace, and then electroslag remelting is performed on the electrode rods. The weight of the electroslag ingot is 0.5t, and the electroslag ingot is heated and forged into a forging billet with a cross-sectional area of 100mm×100mm.
Embodiment 3
[0054] According to the formula batching of table 5, control C is 0.42%, Si is 1.06%, Mn is 0.89%, P is 0.022%, S is 0.012%, Cr is 4.99%, Mo is 0.30%, Ti is 0.13%, Nb is 0.056%, B 0.0031%, and the rest are iron and unavoidable impurities.
[0055] Electrode rods are smelted in a vacuum induction furnace, and then electroslag remelting is performed on the electrode rods. The weight of the electroslag ingot is 0.5t, and the electroslag ingot is heated and forged into a forging billet with a cross-sectional area of 100mm×100mm.
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 steel for an economical MPM continuous-rolled core rod. The steel comprises, by weight, 0.35%-0.45% of C, 0.8%-1.2% of Si, 0.8%-1% of Mn, 4.8%-5.5% of Cr, 0.3%-0.5% of Mo, 0.1%-0.2% of Ti, 0.02%-0.08% of Nb, 0.002-0.004% of B, 0-0.03% of P, 0-0.02% of S, and the balance Fe and impurities. A manufacturing method of the steel comprises the steps that an electrode rod is smelted; the electrode rod is subjected to electroslag remelting to obtain an electroslag ingot; and the electroslag ingot is heated and forged into a forged blank. According to the steel for the economical MPM continuous-rolled core rod and the manufacturing method thereof, the chemical component proportion of the steel is more economical and cheaper, the Mo content and the V content are decreased, and the alloy cost is greatly reduced; and meanwhile, the mechanical properties of the novel steel are reinforced and ensured by increasing the content of the element Mn and the content of the element Si and adding the microalloy elements of the Ti, the Nb and the B.
Description
technical field [0001] The invention belongs to the field of alloy steel, and mainly relates to a steel material used for an economical MPM continuous rolling mandrel and a manufacturing method thereof. Background technique [0002] The mandrel is one of the important tools in the rolling deformation process of the seamless steel pipe, and it is also one of the main consumable spare parts in the production process. According to the different rolling methods of steel pipes, it can be divided into floating mandrel, semi-limited mandrel and limited mandrel, and the proportion of limited mandrel is the largest. [0003] Due to the strong technicality and difficulty in manufacturing the limited motion mandrel, domestic enterprises producing large-diameter seamless steel pipes have mainly imported mandrels from abroad for many years. For example, in 2007, the import volume of mandrels in my country was about 9,000 tons. At present, the production of mandrels in the world is only ...
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