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Preparation technology of stainless steel

A preparation process, stainless steel technology, applied in the field of stainless steel, can solve the problems of wasting heat energy, increasing energy consumption, wasting time, etc., and achieve the effect of saving energy and time

Inactive Publication Date: 2016-11-23
JIANGSU JINMING STAINLESS STEEL NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the stainless steel preparation process in the prior art, the general enterprise puts the raw material aside after sintering and cools it first without burning it, and waits for the amount required for production before transporting and reheating, which not only wastes heat energy, but also increases energy consumption , also takes up multiple devices and wastes precious time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of preparation technology of stainless steel of the present invention, comprises the following steps;

[0027] a, material selection: select the blank material, carry out sampling inspection, and the blank material selects the laterite nickel ore with a water content of 25%;

[0028] b. Sintering: Place the billets that have passed the inspection and meet the standards in a sintering furnace for sintering reduction. The heating rate of the sintering furnace is 4°C / min, the sintering temperature is 1300°C, and the temperature is kept for 1h;

[0029] c. Smelting: The raw materials obtained after sintering furnace are directly put into the submerged arc furnace for smelting. The melting temperature in the submerged arc furnace is 1500°C, and the temperature is kept for 1h;

[0030] d. Tempering: The molten steel heated by the electric furnace enters the tempering furnace for tempering, and the chemical components required for smelting steel are added to the temperi...

Embodiment 2

[0034] A kind of preparation technology of stainless steel of the present invention, comprises the following steps;

[0035] a, material selection: select blank material, carry out sampling inspection, and blank material selects the laterite nickel ore that water content is 30%;

[0036] b. Sintering: Place the billets that meet the standards after inspection into a sintering furnace for sintering and reduction. The heating rate of the sintering furnace is 5°C / min, the sintering temperature is 1350°C, and the temperature is kept for 1.5h;

[0037] c. Smelting: The raw materials obtained after sintering furnace are directly put into the submerged arc furnace for smelting. The melting temperature in the submerged arc furnace is 1550°C, and the heat preservation time is 1.5h;

[0038] d. Tempering: The molten steel heated by the electric furnace enters the tempering furnace for tempering, and the chemical components required for smelting steel are added to the tempering furnace. ...

Embodiment 3

[0042] A kind of preparation technology of stainless steel of the present invention, comprises the following steps;

[0043] a, material selection: select the blank material, carry out sampling inspection, and the blank material selects the laterite nickel ore with a water content of 40%;

[0044] b. Sintering: Place the billets that meet the standards after inspection in a sintering furnace for sintering and reduction. The heating rate of the sintering furnace is 8°C / min, the sintering temperature is 1500°C, and the heat preservation is 1-2h;

[0045] c. Smelting: The raw materials obtained after sintering furnace are directly put into the submerged arc furnace for smelting. The melting temperature in the submerged arc furnace is 1600°C, and the temperature is kept for 1-2h;

[0046] d. Tempering: The molten steel heated by the electric furnace enters the tempering furnace for tempering, and the chemical components required for smelting steel are added to the tempering furnac...

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PUM

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Abstract

The invention relates to a preparation technology of stainless steel. The preparation technology comprises the following steps: a, selecting blanks, b, sintering, c, smelting, d, toughing, e, moulding and f, annealing, wherein in the step a, the blanks are selected, and sampling inspection is carried out; in the step b, the blanks reaching the standard after inspection are placed in a sintering furnace for sintering reduction; in the step c, a raw material obtained after treatment by the sintering furnace directly enters a submerged arc furnace for smelting; in the step d, molten steel heated by an electric furnace enters a toughening furnace for toughening, and chemical components required by the type of steel to be smelted are added to the toughening furnace; in the step e, after the chemical components are mixed, the molten steel obtained in the step d and the chemical components are injected to a mould and are subjected to moulding; and in the step f, a product obtained after the moulding is subjected to annealing treatment, and the required stainless steel is obtained. Compared with the prior art, the preparation technology has the following advantages: after the blanks are sintered, the blanks directly enter the next step without being cooled, so that energy sources are saved, and the valuable time is saved.

Description

technical field [0001] The invention relates to a preparation process of stainless steel, which belongs to the technical field of stainless steel. Background technique [0002] The development and progress of my country's stainless steel industry is relatively late. Since the founding of the People's Republic of China and before the reform and opening up, the demand for my country's stainless steel is mainly for industrial and national defense cutting-edge applications. After the reform and opening up, the rapid development of the national economy and the significant improvement of people's living standards have stimulated the demand for stainless steel. After entering the 1990s, my country's stainless steel industry entered a period of rapid development, and the growth rate of stainless steel demand was much higher than the global level. Since 1990, the global apparent consumption of stainless steel has grown at an average annual rate of 6%, while in the 10 years of the 19...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C33/04C21C5/52
CPCY02P10/20
Inventor 戴如明
Owner JIANGSU JINMING STAINLESS STEEL NEW MATERIALS