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A spray forming pouring method

A technology of spray forming and pouring tube, which is applied in the field of spray forming, can solve problems such as blocked catheter tubes, and achieve the effects of increasing preheating temperature, avoiding solidification, and increasing temperature

Active Publication Date: 2014-10-29
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (3) In addition, during the process of melting the base metal in the smelting furnace, inclusions and scum will inevitably be entrained in the molten steel. If large-sized scum and inclusions enter the catheter pipe preferentially during pouring, then It is easy to block the catheter

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  • A spray forming pouring method

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Embodiment 2

[0034] In this embodiment, the parameters of the pouring pipe are as follows: A: 10mm, B: 29mm, C: 38mm, D: 18mm.

[0035] The initial characteristics of the molten steel and the control of the pouring environment are as follows:

[0036] Liquid steel superheat: 70°C; tundish preheating temperature: 950°C; pouring pipe preheating temperature: 600°C; catheter pipe preheating temperature: 230°C; molten steel flow rate: 1~8kg / min;

[0037] Pour the smelted molten steel into the tundish at a flow rate of 5kg / min. After 35 seconds, the liquid level in the tundish reaches 5mm, reduce the flow rate to 1kg / min, and continue pouring for 25 seconds. At this time, the molten steel in the tundish After the accumulative liquid level reaches 10mm, increase the flow rate to 8kg / min, so that the accumulated molten steel quickly flows in from around the pouring pipe and flows out through the catheter. This time lasts for about 50s. End.

Embodiment 3

[0039] In this embodiment, the parameters of the pouring pipe are as follows: A: 15mm, B: 30mm, C: 40mm, D: 20mm.

[0040] The initial characteristics of the molten steel and the control of the pouring environment are as follows:

[0041] The superheating degree of molten steel: 80°C; the preheating temperature of tundish: 1000°C; the preheating temperature of pouring pipe: 700°C; the preheating temperature of catheter tube: 260°C; the flow rate of molten steel: 2~10kg / min.

[0042] Pour the smelted molten steel into the tundish at a flow rate of 6kg / min. After 20 seconds, the liquid level in the tundish reaches 7.5mm. Reduce the flow rate to 2kg / min. After continuing to pour for 30 seconds, the steel in the tundish After the accumulative liquid level of the liquid reaches 15mm, increase the flow rate to 10kg / min, so that the accumulated molten steel quickly flows in from around the pouring pipe and flows out through the catheter. This time lasts for about 35s. When the pourin...

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Abstract

The invention discloses a spray forming pouring method. A pouring pipe is arranged in a tundish and is provided with taper; the lower part of the pouring pipe is inserted into a drainage pipe; the pouring pipe is a refractory material piece; high-temperature molten steel is injected into the tundish and flows to the drainage pipe along the bottom of an inner cavity of the tundish; because the pouring pipe is inserted above the drainage pipe, the molten steel is accumulated in a cavity between the pouring pipe and the drainage pipe; initial stream of the molten steel is accumulated in the cavity and is preheated in the drainage pipe, and the initial molten steel is subjected to temperature compensation through the subsequent molten steel, so that the overall temperature of the molten steel is raised, the molten steel is accumulated, and the impact strength in the injection process is relieved; and therefore, steel slag generated by turbulence flow is mixed inside the tundish and upwards floats, after the liquid level height of the accumulated molten steel exceeds the pouring pipe, the molten steel uniformly flows into the pouring pipe through an orifice above the pouring pipe, is drained to the drainage pipe from the pouring pipe, and finally flows out of the drainage pipe.

Description

technical field [0001] The invention relates to the field of spray forming, in particular to a spray forming pouring method. Background technique [0002] Spray forming is a new technology that uses rapid solidification to prepare special materials. This technology has the dual characteristics of near-net shape processing and semi-solid processing. Spray forming was first proposed by Professor Singer of the United Kingdom in the 1970s. Its principle is to use the high-pressure inert gas in the atomizing nozzle to atomize the alloy liquid flowing out of the tundish through the catheter into fine droplets. Flying under the action of high-speed airflow and being gradually cooled, these droplets are deposited on a depositor with a certain shape before they are completely solidified. By changing the relative position of the droplet jet and the depositor and the movement form of the depositor, Semi-finished blanks of different shapes, such as discs (columns), tubes (rings), plate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F3/115
Inventor 任三兵乐海荣赵顺利金雷樊俊飞
Owner BAOSHAN IRON & STEEL CO LTD