Continuous casting process for producing high-titanium wear-resisting steel on straight arc slab continuous casting machine
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 slab continuous casting machine and continuous casting process technology are applied in the continuous casting process field of high titanium wear-resistant steel billets, which can solve the problems of different properties of steel plates, growth of titanium compounds, uneven distribution, etc. The effect of ensuring a large number of nucleation and reducing production costs
Inactive Publication Date: 2016-12-07
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
View PDF7 Cites 6 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, it is a research hotspot of martensitic wear-resistant steel to further improve the comprehensive performance of the material by introducing the second phase strengthening on the martensitic matrix. By adding a certain amount of titanium to the composition system mainly composed of Cr-Mo Alloying elements, combined with the control of hot rolling and heat treatment process parameters to disperse and precipitate in the form of hard phase TiC, can develop an ultra-high-strength martensitic wear-resistant steel plate with excellent wear resistance, but currently the type of second phase , shape, distribution and size control is not ideal
[0003] Titanium compounds usually start to precipitate during the solidification process. If the solidification process is not properly controlled, the size of the second phase titanium compounds will eventually be large and unevenly distributed, which will affect the comprehensive performance of wear-resistant steel, especially for some high-titanium wear-resistant steels. steel type
At present, high-titanium wear-resistant steel usually adopts die-casting process. Due to slow cooling during die-casting, it is easy to cause titanium compounds in the slab to precipitate and grow rapidly, which will eventually affect the particle size and distribution of the second phase TiC in the steel plate, resulting in unsuitable properties of the steel plate. , the product qualification rate is low, and the production cycle of the mold casting process is long and the cost is high
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
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0022] In the embodiment, the mass percentage of steel type Ti is above 0.4%, and the produced section is 150*1600mm.
[0023] The continuous casting process of producing high titanium wear-resistant steel on the straight arc slab continuous casting machine,
[0024] (1) The slab is poured and filled with inert gas argon in the tundish, and the filling time is maintained at 10 minutes;
[0025] (2) The continuous casting process adopts the whole protection pouring: the ladle to the tundish is poured with a long nozzle argon-sealed mold slag, the tundish to the crystallizer is poured with a slide-type submerged nozzle, and the molten steel in the tundish is protected by a double-layer covering agent. One layer is alkaline covering agent, and the upper layer is slag;
[0026] (3) The main component weight percentage of the mold flux laid on the surface of the crystallizer is: SiO 2 : 20-40%, Al 2 o 3 : greater than 0 and ≤ 8%, CaO: 20-40%, Fe2O3: greater than 0 and ≤ 5.5%,...
Embodiment 2
[0032] In the embodiment, the mass percentage of the steel type Ti is above 0.4%, and the produced section is 150*2400mm.
[0033] The continuous casting process of producing high titanium wear-resistant steel on the straight arc slab continuous casting machine,
[0034] (1) The slab is poured and filled with inert gas argon in the tundish, and the filling time is maintained at 15 minutes;
[0035] (2) The continuous casting process adopts the whole protection pouring: the ladle to the tundish is poured with a long nozzle argon-sealed mold slag, the tundish to the crystallizer is poured with a slide-type submerged nozzle, and the molten steel in the tundish is protected by a double-layer covering agent. One layer is alkaline covering agent, and the upper layer is slag;
[0036] (3) The main component weight percentage of the mold flux laid on the surface of the crystallizer is: SiO 2 : 20-40%, Al 2 o 3 : greater than 0 and ≤ 8%, CaO: 20-40%, Fe2O3: greater than 0 and ≤ 5...
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
thickness
aaaaa
aaaaa
width
aaaaa
aaaaa
Login to view more
Abstract
The invention relates to a continuous casting process for producing high-titanium wear-resisting steel on a straight arc slab continuous casting machine. The continuous casting process comprises the following steps of: adopting full-protection casting for continuous casting, adopting long nozzle shielding argon gas casting from a steel ladle to a tundish and adopting immersion type water gap protection casting from the tundish to a crystallizer, wherein molten steel in the tundish adopts an alkaline covering agent and a tundish slag double-layer covering agent; adopting an eddy current probe to detect the liquid surface of the crystallizer in a fully-automatic manner in a casting process, and automatically controlling continuous-casting speed according to degree of superheat of the tundish; enabling protective slag on the surface of the crystallizer to be adaptive to high-titanium molten steel; and adopting a mode of quickly cooling the front part and slowly cooling the middle part and the rear part for a secondary cooling region of the crystallizer. According to the continuous casting process, secondary oxidization of molten steel in the casting process can be effectively prevented, stability of titanium in the molten steel is guaranteed, and the protective slag is prevented from being denatured; and meanwhile, separation of large-particle titanium compounds in steel can be restrained by optimizing and cooling, so that the problems that titanium compound particles in die casting are relatively great and are not even in distribution are solved, and the titanium compounds in the steel are guaranteed to be fine and uniformly distributed.
Description
technical field [0001] The invention belongs to the technical field of continuous casting in the metallurgical industry, and in particular relates to a continuous casting process of a high-titanium wear-resistant steel slab. Background technique [0002] In recent years, my country has made great progress in the research of low-alloy martensitic wear-resistant steel. This type of wear-resistant steel has excellent strength, toughness and wear resistance, and the cost is not high. At present, it is a research hotspot of martensitic wear-resistant steel to further improve the comprehensive performance of the material by introducing the second phase strengthening on the martensitic matrix. By adding a certain amount of titanium to the composition system mainly composed of Cr-Mo Alloying elements, combined with the control of hot rolling and heat treatment process parameters to disperse and precipitate in the form of hard phase TiC, can develop an ultra-high-strength martensitic...
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
Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/22B22D11/18B22D11/111
CPCB22D11/225B22D11/111B22D11/18
Inventor 邱文军钱刚阮小江陈玉辉徐国庆韩全军李忠平官跃辉刘吉刚刘俊
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
Login to view more