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Production process of steel for spectral standard sample and its pouring device

A spectral standard sample and production process technology, which is applied in the field of steel production process for spectral standard sample and its pouring device, can solve problems such as tissue crack shrinkage defects, element multi-organization properties, large demand for standard samples, etc., and achieve quality improvement Effects of hit rate, reduction of raw material consumption, reduction of element segregation

Inactive Publication Date: 2016-09-14
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the production process, due to factors such as many elements and high requirements on microstructure and performance, there are difficult problems such as difficult control of composition, composition segregation, microstructure cracks and shrinkage defects, etc., which are concentrated in the process of smelting and casting
These problems have resulted in the current contradictions of large demand for standard samples and fewer production companies. If the current process equipment can be used to develop a production process for multi-element spectral standard samples, it will have huge economic benefits and industrial application value.

Method used

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  • Production process of steel for spectral standard sample and its pouring device
  • Production process of steel for spectral standard sample and its pouring device
  • Production process of steel for spectral standard sample and its pouring device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) The composition of the 1# standard sample steel in this embodiment is shown in Table 1. The carbon in the composition is required to be less than 0.006%. For this type of ultra-low carbon steel, it is required to strictly control the carbon addition link in the intermediate frequency furnace smelting process. The number of temperature measurements, the temperature measurement gun uses a paper tube to measure the temperature and quickly draws out the molten steel.

[0034] Table 1 1# standard steel composition control requirements

[0035]

[0036] (2) Smelting of standard steel

[0037] Add W, Ni, Cu, Mo and industrial pure iron along with the furnace, the standard sample of this group requires w (N) =0.0045%, the nitrogen content of the intermediate frequency induction furnace is already low, so the nitrogen increase link is reduced in the smelting process, and the metal chromium is required to be added after the molten steel is melted to prevent the formation...

Embodiment 2

[0047] (1) The composition of the 2# standard sample steel of this embodiment is shown in Table 3. The content of stable elements such as Cr, Ni, Cu, and W in steel is relatively low, so when scrap steel is used as raw material, scrap steel must be proportioned, and low Cr, Ni, and other scrap steel raw materials must be selected.

[0048] Table 3 Component control requirements of 2# standard sample steel

[0049]

[0050] (2) Smelting of standard steel

[0051] After the scrap steel and other raw materials are melted, take samples, and decide whether to carry out oxygen blowing operation according to the C content, and add Cu, Mo and other elements with weak affinity to oxygen. Add Si, Mn, C in sequence after slag reduction, add Sb, S, Sn in sequence after 5 minutes, take a sample of the molten steel, do a quick elemental analysis, quickly adjust the elements that do not match the composition online, and add in order after all the added elements are qualified For Al and ...

Embodiment 3

[0061] (1) The composition of the 3# standard sample steel of this embodiment is shown in Table 5.

[0062] Table 5 Component Control Requirements of 3# Standard Sample Steel

[0063]

[0064] (2) Smelting of standard steel

[0065] After the scrap steel and other raw materials are melted, the oxide slag is removed to form a new slag, and Cr, Ni, Cu, Mo, V, W and other oxygen elements are added according to the original sample composition. Deoxidize the top slag to make reducing slag, then add Si, Mn, and C in sequence, and then add Nb, Sb, and P in sequence after 5 minutes, take samples of the molten steel, and perform rapid elemental analysis. Elements with incompatible components are quickly adjusted online. After qualified, add Al, Ti, B in sequence, and reduce the temperature and power before adding Al, and the final tapping temperature is controlled at 1610 ° C ~ 1670 ° C.

[0066] (3) Casting of standard steel

[0067] The cavity length of the ingot mold for pouri...

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Abstract

The invention discloses a steel production process for a spectral standard sample and a pouring device thereof. The steel production process comprises the steps of smelting steel for the standard sample with qualified components in an intermediate-frequency furnace by the processes of optimizing the charging sequence before smelting, deoxidizing slags in the process, adding alloy in batch according to classes and the like; controlling the pouring temperature of molten steel and the baking of the pouring device in the pouring process, and pouring a cast ingot with compact textures and without the defects of looseness, shrinkage cavity and the like on the horizontal pouring device; rapidly cooling in the process of solidification crystallization, so as to reduce segregation of the cast ingot in the process of solidification. The smelting period of the process is controlled within 2.5 hours, and the process is especially suitable for the steel for the standard sample of mass alloying elements; the produced cast ingot is compact without looseness or shrinkage cavity, and the product yield and quality are greatly increased; by using the rapid cooling process of the cast ingot, the segregation of the components in the steel is greatly reduced, two problems of component control and component segregation of the steel for the standard sample of more than 20 elements are solved by using the whole production process, and the production process has an important practical value on the production of the steel for the metallurgical standard sample.

Description

technical field [0001] The invention belongs to steel for spectral standard samples, and specifically refers to a production process of steel for spectral standard samples and a casting device thereof. Background technique [0002] In 2013, the annual output of iron and steel products in my country has exceeded 900 million tons. Both the process and the product require fast spectrum analysis. Therefore, metallurgical production is inseparable from spectral standard samples. In addition, the current product replacement is fast, and the demand for metallurgical spectral standard samples in production is increasing, and the quality is getting higher and higher. Many high-end spectral standard samples need to be imported. [0003] At present, new grades of high-end products such as silicon steel have a large demand for spectral standard samples, especially for a complete set of spectral standard samples with multiple elements and a wide content coverage. It is expected that the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/00B22D9/00C21C5/52G01N1/28
CPCB22D7/00B22D9/00C21C5/5241G01N1/28Y02P10/20
Inventor 岳江波陈子宏李峰刘念曾永龙汪波
Owner 武汉钢铁有限公司