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Device for increasing cooling speed of ingot casting and using method of device

A technology of cooling speed and ingot casting, which is applied in the field of metal mold casting, can solve the problems of not improving the heat transfer capacity of the metal-mold interface, and achieve the effects of reducing macro segregation, shortening the production cycle, and changing the heat transfer mode

Inactive Publication Date: 2020-08-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the heat transfer capacity of the interface gap between the mold and the ingot is the decisive factor for the cooling rate during the solidification process of the metal mold. Research on interface heat transfer ability

Method used

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  • Device for increasing cooling speed of ingot casting and using method of device
  • Device for increasing cooling speed of ingot casting and using method of device
  • Device for increasing cooling speed of ingot casting and using method of device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1. In this example, the traditional metal mold material is H13 steel, its composition is: (wt. %) 0.4 C, 1.0 Si, 0.4 Mn, 5.1 Cr, 1.3 Mo, 1.0 V; fusible metal mold The material is 6061 aluminum alloy, and its composition is: (wt. %) 0.3 Cu, 1.0 Mg, 0.12 Mn, 0.25 Zn, 0.04 Cr, 0.6 Si, 0.7 Fe; the casting alloy is X12CrMoWVNbN10-1-1 alloy steel, and its composition is : (wt. %) 0.12 C, 10.5 Cr, 1.06 Mo, 0.98 W, 0.45Mn, 0.18 V, 0.055 Nb, 0.75 Ni, 0.052 N, 0.09 Si; mullite fiberboard is selected as the insulation material.

[0024] In the present embodiment, the height of the metal mold and the fusible metal mold is 108mm; the outer diameter of the metal mold is 118mm, and the inner diameter is 87mm; the inner diameter of the fusible mold is 76mm, and the wall thickness is 5mm; the mullite fiberboard The thickness is 25m. The melting temperature and casting temperature of X12CrMoWVNbN10-1-1 steel are both 1600℃.

[0025] For comparison, traditional metal mold castin...

Embodiment 2

[0027] Example 2. In this example, the traditional metal mold material is H13 steel, its composition is: (wt. %) 0.4 C, 1.0 Si, 0.4 Mn, 5.1 Cr, 1.3 Mo, 1.0 V; fusible metal mold The material is 6061 aluminum alloy, and its composition is: (wt. %) 0.3 Cu, 1.0 Mg, 0.12 Mn, 0.25 Zn, 0.04 Cr, 0.6 Si, 0.7 Fe; the casting alloy is X12CrMoWVNbN10-1-1 alloy steel, and its composition is : (wt. %) 0.12 C, 10.5 Cr, 1.06 Mo, 0.98 W, 0.45Mn, 0.18 V, 0.055 Nb, 0.75 Ni, 0.052 N, 0.09 Si; mullite fiberboard is selected as the insulation material.

[0028] In this embodiment, the height of the metal mold and the fusible metal mold is 156mm; the outer diameter of the metal mold is 118mm, and the inner diameter is 96mm; the inner diameter of the fusible mold is 76mm, and the wall thickness is 10mm. The thickness of mullite fiberboard is 25m. The melting temperature and casting temperature of X12CrMoWVNbN10-1-1 steel are both 1600℃.

[0029] Figure 5 It is the macrostructure of X12 steel ing...

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Abstract

The invention discloses a device for increasing the cooling speed of an ingot casting. The device mainly involves four parts of an ingot casting bottom thermal insulation material, a metal casting mold, a fusible metal casting mold and middle casting ladles at the tops of the casting molds, wherein the metal casting mold adopts a bottomless form, so that ingot casting demolding is facilitated after solidification is finished; the middle casting ladles are located over the casting molds, it is guaranteed that melt is vertically poured into the fusible metal casting mold, and the melt is prevented from impacting the wall of the fusible metal casting mold; the fusible metal casting mold is placed on the inner side of the metal casting mold, the casting molds are in a solid state at an initialstage of gapless metal mold casting, and the metal melt can be solidified and formed; and after a solidification shell is formed on the surface of the melt, the fusible casting mold absorbs latent heat of solidification of the melt to be molten into a liquid state, then the space between the cast ingot and the casting mold is filled with the melt, and the liquid state is kept for a long time until the cast ingot is completely solidified. According to the device for increasing the cooling speed of the ingot casting, the purposes of increasing the ingot casting cooling speed, shortening the ingot casting production period, reducing ingot casting macrosegregation, refining the ingot casting microstructure and the like can be achieved.

Description

technical field [0001] The invention belongs to the field of metal mold casting, and relates to a device for increasing the cooling rate of an ingot and a use method thereof. The device can greatly increase the solidification rate during the solidification process of the ingot. Background technique [0002] In the solidification process, increasing the cooling rate has many advantages, such as refining grains, reducing macro-segregation, increasing solid solubility, increasing strength, and enhancing corrosion resistance. Although in the past few decades, researchers have invented many methods to increase the cooling rate, such as: suction casting, stripping method, atomization method, laser surface remelting, etc., but these methods are all at the expense of the size of the product. premise. Therefore, how to obtain a faster cooling rate in a large area is still a major problem in the field of metal solidification. [0003] The cooling rate during solidification depends o...

Claims

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Application Information

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IPC IPC(8): B22D7/06
CPCB22D7/064
Inventor 曾龙张卫夏明许李建国
Owner SHANGHAI JIAO TONG UNIV