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Steel layer material of brazing composite strip and brazing aluminium-steel composite strip

A composite strip and steel layer technology, which is applied in the field of steel layer materials and brazed aluminum-steel composite strips, can solve problems such as material failure, great impact on use, and delamination of aluminum-steel interfaces, so as to improve product yield, The effect of lowering the cost price and raising the generation temperature

Inactive Publication Date: 2017-02-01
YINBANG CLAD MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Intermetallic brittle compounds have the characteristics of high melting point and high hardness, but intermetallic brittle compounds show obvious brittleness at room temperature, which has a great impact on the use of aluminum / steel composite materials in practical applications, and can easily lead to aluminum-steel interface separation. layer, which renders the material ineffective

Method used

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  • Steel layer material of brazing composite strip and brazing aluminium-steel composite strip
  • Steel layer material of brazing composite strip and brazing aluminium-steel composite strip
  • Steel layer material of brazing composite strip and brazing aluminium-steel composite strip

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Experimental program
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Effect test

Embodiment 1

[0027] The mass percentage of the components of the aluminum layer used: 0.8% of silicon Si, 0.8% of iron Fe, 0.07% of copper Cu, 0.05% of manganese Mn, 0.04% of zinc Zn, and the rest are aluminum Al and unavoidable impurity elements The mass percentage of each component of the steel layer: carbon C is 0.05%, silicon Si is 0.017%, manganese Mn is 0.286%, phosphorus P is 0.02%, sulfur S is 0.004%, aluminum Al is 0.003%, and the rest is iron Fe and others Unavoidable impurity elements.

[0028] Such as image 3 As shown, the aluminum-steel composite strip with this composition was heated to 608°C and kept for 720 minutes for heat treatment, and no intermetallic brittle phase compound was produced.

Embodiment 2

[0030] The mass percentage of the components of the aluminum layer used: 0.8% of silicon Si, 0.6% of iron Fe, 0.1% of copper Cu, 0.03% of manganese Mn, 0.04% of zinc Zn, and the rest are aluminum Al and unavoidable impurity elements The mass percentage of each component of the steel layer: carbon C is 0.0015%, silicon Si is 0.2%, manganese Mn is 0.284%, phosphorus P is 0.01%, sulfur S is 0.005%, aluminum Al is 0.004%, and the rest is iron Fe and others Unavoidable impurity elements.

[0031] Such as Figure 4 As shown, the aluminum-steel composite strip with this composition was heat-treated at 616°C for 60 minutes, and no intermetallic brittle phase compound was produced.

Embodiment 3

[0033] The mass percentage of the components of the aluminum layer used: 0.8% of silicon Si, 0.7% of iron Fe, 0.08% of copper Cu, 0.04% of manganese Mn, 0.05% of zinc Zn, and the rest are aluminum Al and unavoidable impurity elements The mass percentage of each component of the steel layer: carbon C is 0.0015%, silicon Si is 0.01%, manganese Mn is 1.6%, phosphorus P is 0.01%, sulfur S is 0.004%, aluminum Al is 0.005%, and the rest is iron Fe and others Unavoidable impurity elements.

[0034] Such as Figure 5 As shown, the aluminum-steel composite strip with this composition was heated to 608 ° C for 180 min heat treatment, and no intermetallic brittle phase compound was produced.

[0035] Such as Figure 6 As shown, the aluminum-steel composite strip with this composition was heated to 616°C and held for 60 minutes for heat treatment, and no intermetallic brittle phase compound was produced.

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Abstract

The invention discloses a steel layer material of a brazing composite strip and a brazing aluminium-steel composite strip. The steel layer material comprises the following components in percentage by mass: 0.001-0.05% of C, 0.01-0.8% of Si, 0.26-1.6% of Mn and the balance of Fe and unavoidable impurity elements; the brazing aluminium-steel composite strip comprises an aluminium layer and a steel layer; the aluminium layer comprises the following components in percentage by mass: 0.8% of Si, equal to or less than 0.8% of Fe, equal to or less than 0.1% of Cu, equal to or less than 0.05% of Mn, equal to or less than 0.05% of Zn and the balance of Al and unavoidable impurity elements; and the steel layer is the steel layer material. According to the invention, through changing components of the steel layer material, generation temperature of intermetallic bristle compounds of the brazing composite strip is raised, the soaking time for generation of intermetallic bristle compounds of the brazing composite strip is prolonged, and the cost price of the steel layer is lowered.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to a steel layer material of a brazing composite strip and a brazing aluminum-steel composite strip. Background technique [0002] Aluminum-steel composite material is a metal layered structure composite material, which is widely used in the fields of electric power, automobiles, kitchen utensils, decoration, etc. Among them, the highest ambient temperature is the finned tube base tube for power station air cooling in the power industry. 600±10℃, holding time ≤20min. [0003] The currently used aluminum / steel materials for brazing are aluminum: 4A60 aluminum alloy, and steel: 08Al ultra-low carbon steel. When 4A60 aluminum alloy / 08Al ultra-low carbon steel is used at 600±10°C and the holding time is 20 minutes, the interface will not produce coarse and continuous iron-aluminum intermetallic brittle compounds, but when the temperature exceeds 610°C or the hol...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C21/02
CPCC22C38/004C22C21/02C22C38/02C22C38/04
Inventor 张小军周德敬李龙
Owner YINBANG CLAD MATERIAL
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