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A surface casting infiltration process suitable for pure copper blast furnace tuyere sleeve

A tuyere cover, casting infiltration technology, applied in the direction of tuyere, casting mold, casting mold composition, etc., can solve the problems of long production cycle, little progress, complex process, etc., and achieve the effect of short production cycle

Inactive Publication Date: 2016-04-13
江西重科机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The surface treatment of blast furnace tuyeres usually adopts heat treatment multi-component co-infiltration. This method is a secondary treatment after the workpiece is formed, and requires special equipment. The production cycle is long and the process is relatively complicated. Due to the diffusion of atoms, the obtained treatment surface depth Smaller, generally tens of microns
In the 1980s, the newly developed casting infiltration surface modification method was widely used in cast iron and cast steel, and some progress has been made, but little progress has been made in non-ferrous metals, especially copper, which is widely used.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] The cast infiltration process steps are as follows:

[0008] (1) Raw materials are prepared according to the following weight ratio: copper-based self-fluxing alloy powder 100 orders 80%, Al 2 o 3 Powder 100 mesh 15%, water glass 1%, the rest is water;

[0009] (2) Fully mix the raw materials, coat the surface to be infiltrated in the mold cavity, dry at a temperature of 150°C, and hold for 2 hours, then pour the smelted copper solution into the cavity, and the pouring temperature It is 1150°C.

[0010] The blast furnace tuyere copper alloy workpiece obtained by the above method has the following obvious characteristics:

[0011] 1) The thickness of the seepage layer is 1 to 2.5mm;

[0012] 2) Permeation layer performance: surface macro hardness: ≥HRC50.

Embodiment 2

[0014] The cast infiltration process steps are as follows:

[0015] (1) Raw materials are prepared according to the following weight ratio: copper-based self-fluxing alloy powder 200 orders 70%, Al 2 o 3 Powder 200 mesh 25%, water glass 2%, the rest is water;

[0016] (2) Fully mix the raw materials, coat the surface to be infiltrated in the mold cavity, dry at a temperature of 180°C, and hold for 2.5 hours, then pour the smelted copper solution into the cavity, and the pouring temperature It is 1200°C.

[0017] The blast furnace tuyere copper alloy workpiece obtained by the above method has the following obvious characteristics:

[0018] 1) The thickness of the seepage layer is 1 to 2.7mm;

[0019] 2) Permeation layer performance: surface macro hardness: ≥HRC50.

Embodiment 3

[0021] The cast infiltration process steps are as follows:

[0022] (1) Raw materials are prepared according to the following weight ratio: copper-based self-fluxing alloy powder 300 orders 60%, Al 2 o 3 Powder 300 mesh 35%, water glass 3%, the rest is water;

[0023] (2) Fully mix the raw materials, coat the surface to be infiltrated in the mold cavity, dry at 220°C, and hold the temperature for 3 hours, then pour the smelted copper solution into the cavity, the pouring temperature is It is 1250°C.

[0024] The blast furnace tuyere copper alloy workpiece obtained by the above method has the following obvious characteristics:

[0025] 1) The thickness of the seepage layer is 1 to 3.0mm;

[0026] 2) Permeation layer performance: surface macro hardness: ≥HRC50.

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Abstract

A surface casting infiltration process suitable for a pure copper blast-furnace tuyere sleeve is characterized by comprising a first step of preparing raw materials which are, by weight, 60-80% of copper-based self-fluxing alloy powder of 100-300 meshes, 15-40% of Al2O3 powder of 100-300 meshes, 1-3% of water glass, and the balance water; a second step of fully mixing the raw materials, coating the raw materials on the to-be-infiltrated surface in a casting cavity, drying the raw materials at 150-220 DEG C, enabling heat retaining time to be 2-3h, then enabling copper solution smelted well to be poured into the cavity, and enabling the pouring temperature to be 1,150-1,250 DEG C. Due to the fact that a workpiece forming and surface modification one-time forming method is adopted, a special device is not required, and compared with other surface modification methods, the surface casting infiltration process has the advantages of being short in production cycle, simple, low in cost and stable.

Description

technical field [0001] The invention relates to a surface casting infiltration process suitable for tuyere sleeves of pure copper blast furnaces. Background technique [0002] The surface treatment of blast furnace tuyeres usually adopts heat treatment multi-component co-infiltration. This method is a secondary treatment after the workpiece is formed, and requires special equipment. The production cycle is long and the process is relatively complicated. Due to the diffusion of atoms, the obtained treatment surface depth Smaller, generally tens of microns. In the 1980s, the newly developed casting infiltration surface modification method is widely used in cast iron and cast steel, and has made some progress, but it has not made much progress in non-ferrous metals, especially copper, which is widely used. Contents of the invention [0003] The object of the present invention is to provide a surface casting and infiltration process suitable for tuyere sleeves of pure copper ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D23/04B22C3/00C21B7/16
Inventor 龙文元范宝柱江荣生
Owner 江西重科机械有限公司