A production process of low-cost high-performance medium-carbon steel
A production process and high-performance technology, which is applied in the production process of low-cost and high-performance medium carbon steel, can solve problems such as the inability to use rolling production lines, and achieve the advantages of improving mechanical properties, improving various performance indicators, and reducing the content of alloying elements. Effect
Active Publication Date: 2019-10-29
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] At present, the manufacturing methods of submicron / nanocrystalline medium carbon steel are in the laboratory research stage, and cannot be used in the actual rolling production line
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 1－6
[0017] Embodiments 1-6: The production process of the low-cost and high-performance medium-carbon steel is specifically described as follows.
[0018] (1) The chemical composition of the medium carbon steel is as follows according to weight percentage: C 0.44-0.50%, Si 0.26-0.33%, Mn 0.60-0.70%, P≤0.025%, S≤0.025%, and the balance is Fe and unavoidable trace elements or impurities. The chemical composition of the medium carbon steel described in each embodiment is shown in Table 1.
[0019] Table 1: Chemical composition (wt%) of medium carbon steel described in each example
[0020]
[0021] In Table 1, the balance is Fe and unavoidable trace elements or impurities.
[0022] (2) The process includes heat treatment and warm rolling process. The heat treatment process: put the medium-carbon steel billet whose initial structure is ferrite plus pearlite into the heating furnace, and heat the billet to 850-865°C along with the furnace to keep it austenitized. The holding time...
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 |
|---|---|---|
| particle size | aaaaa | aaaaa |
| size | aaaaa | aaaaa |
| hardness | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a production technology of low-cost high-performance medium carbon steel. The production technology comprises a heat treatment process and a warm-rolling process. According tothe heat treatment process, a medium carbon steel blank is heated to 850-865 DEG C in a heating furnace, and heat preservation is carried out; and then the steel blank is put into hot water with the temperature of 84-88 DEG C for quenching. According to the method, the pre-treatment is carried out before the warm-rolling process of the medium carbon steel, so that precipitation amount of proeutectoid ferrite is reduced, the number of pearlite is increased, and a small amount of the proeutectoid ferrite is controlled to be distributed in a strip shape along the grain boundary of the pearlite; and then the ferrite is enabled to form fine subgrains by reasonably controlling parameters of the warm-rolling process, the final structure is a complex phase structure with the ultrafine ferrite andgranular carbide, so that the mechanical property of the medium carbon steel is remarkably improved; all performance indexes of the medium carbon steel produced by the method are obviously improved, and the strength performance equivalent to the strength performance of commercial alloy steel is achieved, so that the addition of expensive alloy elements is avoided, and the welding performance is facilitated due to the decrease of the content of the alloy elements.
Description
technical field [0001] The invention belongs to the technical field of iron and steel material preparation, in particular to a production process of low-cost and high-performance medium-carbon steel. Background technique [0002] Carbon steel is the earliest and most used basic material in modern industry. While the industrial countries in the world are striving to increase the output of low-alloy high-strength steel and alloy steel, they are also paying great attention to improving the quality of carbon steel and expanding the variety and scope of use. At present, the output of carbon steel accounts for about 80% of the total output of steel in various countries. It is not only widely used in construction, bridges, railways, vehicles, ships and various machinery manufacturing industries, but also in the modern petrochemical industry, It has also been widely used in marine development and other aspects. In recent years, the mechanical properties of traditional steel materi...
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): C21D8/00C21D1/18C22C38/02C22C38/04
CPCC21D1/18C21D8/005C21D2211/004C21D2211/005C22C38/02C22C38/04
Inventor 冯运莉宁江利宋卓斐王黎光段宝美孟冉冉张馨月曹阔
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY