A kind of high hardness carbon formwork steel
A high-hardness, carbon technology, applied in the field of die steel, can solve the problems of only 150mm maximum thickness, low yield of steel ingots, and failure to meet customer requirements, etc., to achieve the effect of improving market competitiveness, short production cycle, and high cost performance
Active Publication Date: 2022-02-01
JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The steel used in each part of the mold is different. The important standard plastic mold base in the mold is generally made of 45 steel. 45 steel has certain plasticity and wear resistance. The material source is convenient and the application range is wide. The hardness of the frame is low, the performance fluctuates greatly, and the durability is poor. Moreover, the steel specifications for molds are getting thicker and thicker. The thickness of carbon steel plates with high performance requirements in the market is generally below 150mm, which cannot meet customer requirements.
The patent No. CN1076760C discloses a plastic mold formwork steel and its manufacturing method. The steel increases the hardness and strength of the mold steel plate by adding more than 2.1% of the Mn element and adding 0.12% V alloying, but the steel plate The steel ingot has a low finished product rate, and the cost of the alloy is high, and the cost performance is low.
Patent CN108425067A invented a large-thickness high-quality carbon mold steel plate and its production method. The invention has high hardness and good impact, but the maximum thickness is only 150mm, and the highest flaw detection level can only meet NB / T47013.3-2015 Ⅲ level
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 Construction
[0027] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0028] The chemical composition of the steel plate for carbon formwork corresponding to the two embodiments satisfies: C: 0.42-0.51%, Si: 0.17-0.37%, Mn: 0.50-0.80%, S: ≤0.025%, P: ≤0.025%, Cr: 0.30-0.40%, Al: 0.02-0.05%, and the balance is Fe and unavoidable impurity elements.
[0029] The chemical compositions of the specific two examples and comparative examples are shown in Table 1.
[0030] Table 1 embodiment and comparative example chemical composition (wt %)
[0031] Numbering C Si mn P S Cr Al Example 1 0.45 0.24 0.74 0.010 0.002 0.33 0.029 Example 2 0.44 0.24 0.76 0.011 0.002 0.34 0.028 comparative example 0.45 0.27 0.75 0.014 0.003 0.03 0.03
[0032] Both the examples and the comparative examples use continuous casting slabs as steel slabs, and the manufacturing process of ...
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 |
|---|---|---|
| yield strength | aaaaa | aaaaa |
| tensile strength | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a high-hardness carbon formwork steel, the chemical composition of which is C: 0.42-0.51%, Si: 0.17-0.37%, Mn: 0.50-0.80%, S: ≤0.025%, and P: ≤0.025%, Cr: 0.30-0.40%, Al: 0.02-0.05%, and the balance is Fe. In the steel plate production process of this steel, the steel billet is firstly heated until it is fully austenitized and fully insulated. After it is released from the furnace, a differential temperature rolling process is adopted, which is divided into rough rolling and finish rolling. Before rough rolling, spray water on the surface of the steel plate to cool the steel plate. surface, so that the surface of the steel plate can be hardened rapidly; during rough rolling, low-speed and high-pressure rolling is adopted; the waiting temperature thickness of finish rolling is 1.6-2.5h, and 2-3 smoothing passes are added before the end of rolling; high-temperature off-line after rolling Air cool to room temperature. By adding a small amount of Cr to suppress polygonal ferrite, the strength and hardness of the steel are improved.
Description
technical field [0001] The invention relates to special alloy steel and a smelting method thereof, in particular to a mold steel. Background technique [0002] Mold is the basic process equipment for the production of industrial products, and it is widely used in various industries such as household appliances, electronics and automobiles. The steel used in each part of the mold is different. The important standard plastic mold base in the mold is generally made of 45 steel. 45 steel has certain plasticity and wear resistance. The material source is convenient and the application range is wide. The hardness of the frame is low, the performance fluctuates greatly, and the durability is poor. Moreover, the steel specifications for molds are getting thicker and thicker. The thickness of carbon steel plates with high performance requirements in the market is generally below 150mm, which cannot meet customer requirements. The patent No. CN1076760C discloses a plastic mold formwo...
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): C22C38/02C22C38/04C22C38/06C22C38/18C22C33/04C21D8/02
CPCC22C38/02C22C38/04C22C38/002C22C38/18C22C38/06C22C33/04C21D8/0226
Inventor 吴扬何广霞许晓红苗丕峰黄军葛恒贵
Owner JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO LTD