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Impact basin for die casting and preparation method thereof

A technology of mold casting and buffer area, which is applied in the field of impact basin for mold casting and its preparation, can solve the problems of refractory material erosion and inclusion, secondary oxidation of molten steel, etc., and achieve the effects of preventing hydrogenation of molten steel, reducing moisture, and reducing slag entrainment in molten steel risk effect

Pending Publication Date: 2021-01-01
NANJING IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the casting process, the molten steel absorbs air seriously, causing the secondary oxidation of the molten steel, and the splashing of the molten steel seriously scours the refractory material and easily leads to inclusions

Method used

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  • Impact basin for die casting and preparation method thereof
  • Impact basin for die casting and preparation method thereof
  • Impact basin for die casting and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017]The material of the impact basin in Example 1: 80 alumina 60%, mullite 22%, calcium silicate cement 10%, explosion-proof fiber 3%, alumina powder 5%; production process: casting molding → 24h demoulding → curing 48h→heating furnace baking at 300℃×24h→heating furnace baking at 600℃×24h.

[0018]After testing, its normal temperature compressive strength (240℃×3h): 55MPa, flexural strength (1500℃×3h): 12MPa. In addition, the impact basin has good thermal shock resistance, no online baking is required, and it can be used directly in contact with molten steel, which is convenient for on-site operation and reduces safety risks.

Embodiment 2

[0019]Material for the impact basin in Example 2: 80 alumina 50%, mullite 30%, calcium silicate cement 10%, explosion-proof fiber 5%, and alumina powder 5%; manufacturing process: casting molding → 29h demoulding → curing 72h→heating furnace baking at 300℃×26h→heating furnace baking at 600℃×28h.

[0020]After testing, its normal temperature compressive strength (240℃×3h): 53MPa, flexural strength (1500℃×3h): 14MPa.

Embodiment 3

[0021]The material of the impact basin in Example 3: 80 alumina 60%, mullite 20%, calcium silicate cement 10%, explosion-proof fiber 5%, and alumina powder 5%; production process: casting molding → 36h demoulding → curing 60h→heating furnace baking at 300℃×24h→heating furnace baking at 600℃×24h.

[0022]After testing, its compressive strength at room temperature (240℃×3h): 56MPa, flexural strength (1500℃×3h): 13MPa.

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Abstract

The invention discloses an impact basin for die casting and a preparation method thereof. The impact basin is used during bottom pouring of die casting, a buffer area of the impact basin can buffer molten steel from a central guide pipe, molten steel splashing in the die casting pouring process can be improved, and the harm of molten steel air suction is reduced. Through the design of an inner cavity slag blocking dam, the molten steel liquid level stability is improved, and the molten steel slag entrapment risk is reduced; and meanwhile, a slag overflow port is formed in the upper edge to prevent steel overflowing risks caused by misoperation, the operation environment is improved, and the safety risk is reduced. Due to the fact that explosion-proof fibers and aluminum oxide micro powderare added into materials for preparing the impact basin, good thermal shock resistance can be generated, online baking is not needed, the impact basin can be in direct contact with the molten steel for use, field operation is convenient, and safety risks are reduced. Meanwhile, high-temperature baking is performed during preparation, so that the moisture of the materials is effectively reduced, and the risks of bursting and molten steel hydrogen increase caused by water in the use process are prevented.

Description

Technical field[0001]The invention relates to a die casting equipment, in particular to an impact basin for die casting and a preparation method thereof.Background technique[0002]The die casting bottom injection method refers to a casting method in which molten steel passes through a central conduit, passes through a flowing steel brick, and then is injected upward from the bottom of the ingot mold into the mold. During the casting process, the molten steel has a serious gas absorption, causing secondary oxidation of the molten steel. The splashing of molten steel will cause serious erosion of the refractory materials and easily lead to inclusions.Summary of the invention[0003]Purpose of the invention: In order to overcome the defects of the prior art, the present invention provides an impact basin for die casting, which can improve the stability of the molten steel surface in the die casting process, improve the protective pouring sealing performance of the die casting, and ensure ...

Claims

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Application Information

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IPC IPC(8): B22D7/06C04B35/10C04B35/66C04B35/622
CPCB22D7/068C04B35/10C04B35/622C04B35/66C04B2235/3454C04B2235/3463C04B2235/5208C04B2235/656C04B2235/6562C04B2235/96C04B2235/9607
Inventor 李明刘桂丽陶镳赵柏杰
Owner NANJING IRON & STEEL CO LTD