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Pouring method for large-section consumable electrode

A pouring method and technology for consumable electrodes, which are applied in the field of pouring large-section consumable electrodes, can solve the problem of high energy consumption, and achieve the effects of saving costs, reducing processes, and shortening preparation time.

Active Publication Date: 2015-05-20
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When electroslag ingots are used to produce large-section retaining rings, the cross-sectional area of ​​the steel ingot is required to be large. In order to produce large-section steel ingots, large-section consumable electrodes are required. Usually, rolling is used to produce large-section consumable electrodes. Or forging production, the energy consumption is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0042] In this example, one furnace of S44SY was smelted by electric furnace smelting + LF furnace refining + VD degassing process, and a large cross-section electrode billet was used for casting.

[0043] The mass percentage of chemical composition after LF furnace refining is:

[0044] C 0.44%; Si 0.22%; Mn 0.77%; P 0.011%; S 0.001%;

[0045] Cr 0.20%; Ni 0.19%; Cu 0.01%; Al 0.013%; V 0.06;

[0046] The rest is Fe and unavoidable impurities.

[0047] The tapping temperature after VD degassing is 1560°C. Bottom blowing argon and stirring weakly for 15 minutes, the flow rate of argon blowing per minute is 0.5-2.5Nm 3 , subject to the fact that the molten steel is not exposed, and then pouring. Two trays are used for pouring, the first tray is 3 ingot moulds, and the second tray is 3 ingot molds.

[0048] The specific requirements and steps of pouring in this embodiment are as follows:

[0049] The specifications of the ingot mold are as follows:

[0050] The inner diame...

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Abstract

The invention relates to a pouring method for a large-section consumable electrode. The pouring method has the requirement that an electrode blank is frustum-shaped, the diameter of the lower end is smaller than that of the upper end, and the height is 2000-6000mm; the length of an ingot mould is 38-42mm larger than that of the electrode blank, the inner diameter of an upper opening of the ingot mould is 815-835mm, and the inner diameter of a lower opening is 805-825mm; and the steel type of a steel ingot is any one of S44SY, H13 and TSM166. The pouring method includes the following steps sequentially that I. the pouring temperature is 60-80 DEG C higher than that of a liquid phase wire, argon sealing protection is adopted in pouring, and the temperature of the ingot mould is 50-100 DEG C; II. composite slag is poured in a protection mode in the protection slag pouring process with the adding quantity being 15.6-16.4 kg / piece; III. a heat generating agent is gently added when the portion of a rise with 0.64-0.70 of the weight of the riser is poured in the riser pouring process, and the adding quantity is 11.8-12.2 kg / piece; and IV. the pouring time of the an ingot body is 16-19min, and the pouring time of the riser is 7-10min. The pouring method for the large-section consumable electrode reduces the working procedure of rolling or forging and reduces production cost.

Description

technical field [0001] The invention relates to a pouring method of a large-section consumable electrode. Background technique [0002] When electroslag ingots are used to produce large-section retaining rings, the cross-sectional area of ​​the steel ingot is required to be large. In order to produce large-section steel ingots, large-section consumable electrodes are required. Usually, rolling is used to produce large-section consumable electrodes. Or forging production, the energy consumption is higher. In order to reduce the cost, a short-flow process is adopted, and the electrode blank is produced by direct casting of the ingot mold. Since the pouring process of directly pouring electrode blanks is different from that of traditional steel ingots, it is necessary to develop a casting process suitable for electrode blanks. Contents of the invention [0003] In order to overcome the above-mentioned shortcomings of the existing large-section consumable electrode casting m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/00C22B9/18
Inventor 陈金虎李建军赵振铎白晋刚
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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