JPH044145A - Metal composite oscillation-damping steel plate with high welding properties and its manufacture - Google Patents

Abstract

PURPOSE:To improve ease of welding by providing zinc particles coagulated from a semi-molten state between steel plates or plated steel plates as an intermediate layer, and dispersing stainless steel particles in said intermediate layer at a specific volume rate. CONSTITUTION:A metal composite oscillation damping stainless steel consists of zinc particles 4 coagulated from a semi-molten state provided between plated stainless steels 1, 2 as an intermediate layer 3. The intermediate layer 3 contains electroconductive stainless steel particles 5. Electroconductivity between the plated stainless steels 1, 2 is enhanced by allowing the presence of the particles 5. Subsequently, a large amount of electric current is required and a proper current range is widened. Thus metal vapor generation is also eliminated, resulting in ease of welding. In addition, voids are formed between the stainless steel particles 5 and therefore, oscillation can be damped significantly. In this case, the volume rate of stainless steel content is 10% or higher and 70% or lower.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a metal composite damping steel plate with excellent weldability and a method for manufacturing the same.

BACKGROUND ART Conventionally, a resin composite vibration damping steel plate with a resin as an intermediate layer has been known as a vibration damping steel plate (Japanese Patent Application Laid-open No. 128887-1987).
Due to the presence of resin, there were problems in use, such as poor weldability and inability to withstand use at high temperatures. For this reason, a metal composite vibration damping steel plate has been proposed that uses a metal as an intermediate layer and has improved weldability and is advantageous for use in high-temperature conditions.

Problems to be Solved by the Invention However, in the conventional welding of metal composite vibration damping steel plates, a low melting point metal is used for the intermediate layer, which requires a large current during welding, and the appropriate current for welding is difficult. The range is narrow, and there are problems in use, such as the scattering of metal vapor and the generation of blowholes. In addition, in terms of damping properties, it is inferior to resin composite damping steel sheets, so it cannot be said that the damping properties are sufficient. There was room left.

In order to improve these problems of conventional metal composite vibration damping steel plates, the present inventors conducted various studies and found that a highly conductive layer of low melting point metal is added between the steel plates or plated steel plates. By incorporating melting point metal, heating and pressing,
The present inventors have discovered that it is possible to easily produce a metal composite damping steel plate with excellent weldability and damping properties, and have completed the present invention.

Means to solve problems The gist of the present invention is as follows.

(+) Welding characterized in that zinc particles solidified from a semi-molten state are used as an intermediate layer between steel plates or plated steel plates, and stainless steel particles are dispersed in the intermediate layer at a volume percentage of 10 to 70%. A metal composite vibration damping steel plate with excellent properties.

(2) A metal composite damping steel plate with excellent weldability as claimed in claim 1, wherein the intermediate layer has a porosity of 5 to 30%.

(3) The surface of a steel plate or plated steel plate is coated with zinc particles in which stainless steel high melting point metal particles are dispersed in a volume ratio of 10 to 70%, and then crimped to form a 380 to 520
A method for manufacturing a metal composite vibration damping steel plate with excellent weldability, characterized by heat treatment at ℃.

action The details of the present invention will be explained with reference to the drawings.

As shown in FIG. 1, the metal composite vibration damping steel sheet of the present invention is a metal composite vibration damping steel sheet in which the intermediate layer 3 is zinc particles 4 between the plated steel sheets 1 and 2, and the intermediate layer 3 includes conductive stainless steel. It contains particles 5 of. Due to the presence of the conductive stainless steel particles 5, the plated steel sheet 1
The conductivity between and 2 is increased, a large current is not required, the appropriate current range is widened, the generation of metal vapor is suppressed, blowholes can be eliminated, and weldability is improved. Furthermore, voids 6 are formed between the stainless steel particles 5, thereby improving vibration damping properties.

Next, the type of steel plate is not particularly limited and may include steel plates, M plates, Cu plates, etc., but when targeting automobiles, steel plates are preferable from the viewpoint of cost, workability, etc. The type of galvanized steel sheet is not particularly limited, and as long as it is a hot-dip galvanized steel sheet, zinc, zinc-
Any material such as aluminum alloy may be used, and any material such as zinc or zinc-nickel alloy may be used as long as it is an electroplated steel sheet.

Further, the thickness of these steel plates and plated steel plates is not particularly limited, but when targeting automobiles, it is 0.2 to 1.2 I
Approximately 1 m is appropriate, and the plating film thickness is 0.00
The thickness of the intermediate layer is preferably 0.01 to 0.5 am.

Next, the metal contained in the intermediate layer between the plated steel sheets is preferably zinc, and the metal added to the intermediate layer is preferably stainless steel.
The reason for this limitation is that zinc has good adhesion to steel plates and plated steel plates, has excellent vibration damping properties and heat resistance, and is easy to control powder particles.

Also, stainless steel is advantageous because it does not have good wettability with zinc, does not rust, and is good for forming voids because the particle size can be easily controlled. Appropriate diameter is 10% to 100% of the thickness.The volume percentage containing 0th order stainless steel is 10% or more, 7
0% or less is good; the reason for this limitation is that if it is less than 10%, no improvement in weldability or vibration damping properties can be expected, so it is better to make it 105 or more, and if it exceeds 70%, the adhesive strength will decrease and there is a risk of processing defects. Therefore, 70% or less is good.

Next, the heating temperature was set to 380°C or higher and 520°C or lower,
If it is less than 380°C, the bond between the galvanized steel sheet and zinc will be poor, so 380°C or more is better. If it is more than 520°C, excessive melting will occur, reducing the voids secured in the initial state, so 520°C or less is better. .

Example Examples of the present invention will be described below along with comparative examples.

FIG. 2 shows a method for manufacturing a metal composite damping steel plate according to the present invention.

That is, zinc powder 4 and stainless steel 5 are inserted between the zinc-aluminum alloy plated steel sheets 1 and 2, and the thickness of the unfinished intermediate layer 8 is made 5 to 30% thicker than the final finished intermediate layer 3 thickness using the control roll 7. 45 by the heating section 9.
After heating to 0° C., the metal composite vibration damping steel plate 11 was manufactured by pressing the intermediate layer to the final thickness using a pressing roll 10. Table 1 shows the results of measuring the appropriate current range in order to investigate the weldability of the metal composite steel plate manufactured by the manufacturing method, and also measuring the loss coefficient in order to investigate the vibration damping property. Examples are comparative examples. Both have improved weldability and vibration damping properties.

(Left below) Effects of the Invention According to the present invention, the metal composite vibration-damping steel plate of the present invention can reliably improve weldability and vibration-damping properties, and is suitable for use in heat-resistant areas such as those around automobile engines, which have been difficult to use in the past. It can be applied to parts that require good strength and vibration damping properties, and its improved weldability can expand its use as steel sheets for automobiles, making it of great practical value industrially.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view schematically showing a metal composite damping steel plate according to the present invention, and FIG. 2 is a schematic process diagram showing the manufacturing method of the present invention. 1.2... Plated steel plate, 3... Intermediate layer, 4... Zinc, 5... Stainless steel, 6. ... air gap, 7 fists... control roll, 8 lives... middle layer, 9... heating section, 10... crimping roll, 11... fist metal composite vibration damping steel plate.

Claims (3)

[Claims] (1) Welding characterized in that zinc particles solidified from a semi-molten state are used as an intermediate layer between steel plates or plated steel plates, and stainless steel particles are dispersed in the intermediate layer at a volume percentage of 10 to 70%. A metal composite vibration damping steel plate with excellent properties. (2) The metal composite vibration damping steel plate with excellent weldability according to claim 1, wherein the intermediate layer has a porosity of 5 to 30%. (3) Weldability characterized by coating the surface of a steel plate or plated steel plate with zinc particles in which stainless steel particles are dispersed in a volume ratio of 10 to 70%, and then heating the surface to 380 to 520°C and crimping. A method for manufacturing a metal composite vibration damping steel plate with excellent properties.