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Steel ingot and processing technology thereof

A processing technology and steel ingot technology, which is applied in the field of alloy steel processing, can solve the problems of large deviation between surface toughness and core toughness, unfavorable processing, and many raw materials, and achieve small deviation between surface toughness and core toughness, cost reduction, and utilization high value effect

Inactive Publication Date: 2018-07-20
天津荣程联合钢铁集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the process of processing, the raw materials contain more impurities. If they are not treated in the early stage, it will easily affect the later products. For example, the deviation between the surface toughness and the core toughness is large, which is not conducive to the continued processing in the later stage.

Method used

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  • Steel ingot and processing technology thereof
  • Steel ingot and processing technology thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1, a kind of processing technology of steel ingot, this technology comprises the steps:

[0023] Step S1, melting the iron oxide raw material in the electric furnace, and opening the sliding nozzle at the bottom of the ladle in the electric furnace;

[0024] Step S2, the molten steel flows from the ladle into the tundish;

[0025] Step S3, when the molten steel level in the tundish reaches a certain height, open the sliding nozzle at the bottom of the tundish, and make the molten steel flow into the LF furnace containing synthetic slag and deoxidizer for refining (wherein the electrodes in the LF furnace protrude from the outside the furnace cover), in a reducing atmosphere, the desulfurization and deoxidation of molten steel are completed through electrode submerged arc slagging;

[0026] Step S4, opening the sliding nozzle of the LF furnace, transferring the molten steel to the intermediate ladle again for slag removal;

[0027] Step S5, the molten steel ...

Embodiment 2

[0032] Embodiment 2, a processing technology of a steel ingot, the difference from Embodiment 1 is that before the step S1, the following operations are also carried out: before the tundish is baked, the residual debris in the tundish is cleaned, and the ladle is used Argon seal long nozzle.

Embodiment 3

[0033] Embodiment 3, a processing technology of a steel ingot, the difference from Embodiment 2 is that the electrodes in the LF furnace are provided with a lifting device, and the lifting device includes a screw rod vertically arranged inside the LF furnace, and a drive mechanism for driving the screw rod to rotate , the lifting block threadedly connected to the screw rod, and the limit rod that passes through the lifting block and the two are in a sliding fit; the electrodes in the LF furnace are fixedly installed on the lifting block. For the convenience of installation, a horizontal bar can be fixed on the lifting block. Mounted vertically on a crossbar. The driving mechanism is an inverted motor arranged outside the LF furnace. The output shaft of the motor is fixedly connected with a driving gear, and the driving gear is meshed with a driven gear. The driven gear is fixedly connected with the screw rod coaxially; The gear is sleeved with a casing, and the output shaft of...

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Abstract

The invention discloses a steel ingot and a processing technology thereof. Main alloy elements of chemical components of the steel ingot comprise, by mass, 0.42-0.50% of C, 0.18-0.35% of Si, 0.60-0.80% of Mn, less than or equal to 0.25% of Cr, less than or equal to 0.025% of P, less than or equal to 0.025% of S, less than or equal to 0.25% of Ni, less than or equal to 0.25% of Cu, and the balanceFe. The hardness from inside to outside of the steel ingot is relatively uniform. Transfer of a heat treatment structure in the processing technology is relatively single. A metallographic structure is finer and more uniform. More prominent advantages are that a core structure of materials is compact, and deviation of surface toughness and core toughness is minimum, so that utility value is big infinish machining. Moreover, the process cycle is shortened and cost is reduced.

Description

technical field [0001] The invention relates to the technical field of alloy steel processing, in particular to a steel ingot and a processing technology thereof. Background technique [0002] Continuous casting is the abbreviation of continuous steel casting. In the process of producing various steel products in steel plants, there are two methods of using molten steel to solidify and form: the traditional die casting method and the continuous steel casting method. The continuous casting technology that appeared in European and American countries in the 1950s is an advanced technology that directly pours molten steel into shape. Compared with traditional methods, continuous casting technology has significant advantages such as greatly improving metal yield and billet quality, and saving energy. [0003] For example, the utility model patent whose publication number is CN206527325U discloses a billet continuous casting machine, including a ladle, a tundish, a crystallizer,...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/18C22C38/16C22C38/08C22C38/20C22C38/40C22C38/42C21C7/06C21C7/064B22D41/00B22D1/00B22D11/00
CPCC22C38/02B22D1/005B22D11/00B22D41/00C21C7/06C21C7/064C22C38/04C22C38/08C22C38/16C22C38/18C22C38/20C22C38/40C22C38/42
Inventor 赵长春杜海红
Owner 天津荣程联合钢铁集团有限公司