A kind of pouring method of electrode billet

A casting method and electrode technology are applied in the field of electrode blanks, which can solve the problems of high energy consumption and high cost of consumable electrodes.

Active Publication Date: 2015-12-23
SHANXI TAIGANG STAINLESS STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the high energy consumption of the forging or rolling process, the cost of consumable electrodes is high

Method used

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  • A kind of pouring method of electrode billet

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Experimental program
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Embodiment

[0037] In this embodiment, one furnace of G20Cr2Ni4A was smelted by electric furnace smelting + LF furnace refining + VD degassing process, and cast with extra-long electrode blanks.

[0038] The mass percentage of chemical composition after LF furnace refining is:

[0039] C0.19%; Si0.27%; Mn0.58%; P0.016%; S0.004%; Cr1.50%; Ni3.47%; Cu0.01%; Al0.062%;

[0040] The rest is Fe and unavoidable impurities.

[0041] When leaving the VD station, the temperature is 1570°C, the bottom blowing argon is stirred weakly for 15 minutes, and 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, and each tray is 4 ingot moulds.

[0042] The specific requirements and steps of pouring in this embodiment are as follows:

[0043] The specifications of the ingot mold are as follows:

[0044] The inner diameter of the upper mouth is 556; the inner diameter of the lower mouth is 5...

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Abstract

The invention relates to a pouring method of an electrode blank. Its requirements are: the electrode blank is in the shape of a truncated cone, the diameter of the lower end is greater than the diameter of the upper end, and the height is 3640-4240mm; the length of the ingot mold is 38-42mm longer than the electrode blank, The inner diameter of the mouth is 546-566mm; the inner diameter of the lower mouth is 580-600mm; the pouring method includes the following sequential steps: Ⅰ Pouring temperature: 60-80°C higher than the liquidus temperature, protected by argon seal during pouring, and the temperature of the ingot mold is 50-100°C. Ⅱ The pouring mold slag is poured with composite slag, and the addition amount is 7.8-8.2kg / piece; Ⅲ When the cap mouth is poured to 0.64-0.70 of the weight of the cap mouth, gently add heating agent, the amount added is 5.8-6.2? kg / piece. Ⅳ The pouring times are as follows: Pouring time for the ingot body? 9'-11': The pouring time of the cap mouth? 5'-7'. The pouring method of the electrode blank reduces the rolling or forging process, shortens the preparation time of the electrode blank, and saves the cost.

Description

technical field [0001] The invention relates to a pouring method for an electrode blank, specifically an electrode blank with a height of 3640-4240mm and a diameter not greater than 610mm. Background technique [0002] In the electroslag remelting process, the electrode blank is used as the consumable electrode. In general, in order to ensure the filling factor (that is, the ratio of the cross-sectional area of ​​the consumable electrode to the cross-sectional area of ​​the crystallizer) in the smelting process is basically The same, the upper and lower specifications of the consumable electrodes are required to be basically the same, and forged billets or rolled billets are often used. Due to the high energy consumption of the forging or rolling process, the cost of consumable electrodes is high. Contents of the invention [0003] In order to overcome the above disadvantages of the existing casting method for electrode blanks, the present invention provides a casting met...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D7/00B22D7/06B22D25/02
Inventor 李建军陈金虎陈建礼张永亮原凌云
Owner SHANXI TAIGANG STAINLESS STEEL CO LTD
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