JPH03150149A - Manufacture of vibration-damping metal sheet used at ultra-high temperature - Google Patents

Abstract

PURPOSE:To manufacture a vibration-damping metal sheet to be used at the ultra-high temperature by interposing super-plasticity alloy between metal sheets, heating, bonding the metal sheets and integrating. CONSTITUTION:Al powder 3 as super-plasticity alloy powder is sprayed uniformly on a Zn plated steel belt 1b by a super-plasticity alloy powder spraying device 2. A steel belt 1b on which the Al powder 3 is sprayed is overlapped with a Zn plated steel belt 1a fed out of another uncoiler at the position of a deflector roll 4, and the Al powder is fed into both steel belts and transferred into a heating oven 5. The overlapped steel belts 1a and 1b are heated in the oven 5 and Zn plated on the steel belts only is melted to form the state of mixing unmelted Al powder and to form the sheet in which both Zn and Al powder are melted, and both steel belts are bonded together by a super-plasticity alloy layer formed between. The steel belts 1a and 1b are fixed by pressure by pressure rolls 6 on the outlet side of the heating oven 5 and integrated thereon, passed through a cooling device 7 and cooled, and then passed through pinch rollers 8 and wound on a coiler 9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field in Icheon] The present invention relates to a method for producing a damping metal plate for ultra-high temperatures that has high damping properties over a range from room temperature to particularly high temperatures.

[Conventional technology]

In order to provide weldability (resistance welding) to conventional vibration-damping metal plates, a re-weldable composite vibration-damping metal plate in which an adhesive layer containing a conductive filler is interposed between two metal plates is available, for example. Some of them are disclosed in Japanese Patent Application Laid-open No. 60-912 and Japanese Patent Application Laid-Open No. 62-234917.

Among the above, in the former example, vinyl acetate, acrylic resin, and other thermoplastic resins, as well as urea resin, melamine resin, and other thermosetting resins are used as adhesives.
In the latter example, a similar resin is liquefied, a conductive filler is mixed in, and a mixture is uniformly dispersed using a spray nozzle. After drying, two metal plates are pressed together using a pressure roll or the like and re-welded. The method is to form a composite vibration-damping metal plate.

[Problem to be solved by the invention]

However, the conventional composite damping metal plates as described above are laminated and bonded with a viscoelastic resin such as a thermoplastic resin or a thermosetting resin interposed between the metal plates. Because the river is being used, the loss coefficient characteristics in the 11-day river are as shown in the graphs in Figure 2, ■5■, and ■.
Only those with high temperature dependence were obtained, i.e. 2
3 shows the loss coefficient characteristics of damping steel plates manufactured for normal temperature use, 3 for medium temperature use, and 4 for high temperature use.Resin is used to obtain good damping properties at the temperature appropriate for each use. was selected, but the temperature range in which these characteristics can be obtained is extremely narrow, and no distributed metal plate has been developed that can be used at temperatures above 150°C, so the range of application is limited to temperatures below about 150°C. There was a problem that

This invention has been made in view of such conventional problems, and aims to solve the above problems by using a superplastic alloy as an adhesive for metal plates.

[Failure to solve the problem]

In order to achieve the above-mentioned object, the present invention provides a method for manufacturing a vibration-damping metal plate for ultra-high temperatures, in which a superplastic alloy is interposed between metal plates, and the metal plates are bonded and integrated by heating. be.

[Effect]

This invention has the above-mentioned configuration, and includes, for example, two
Because a superplastic alloy was used as an adhesive for two metal plates,
A damping metal plate for ultra-high temperatures that far exceeds the applicable temperature of damping metal plates conventionally used for high-temperature applications, has a high ki especially around 300°C, and has a characteristic that the loss coefficient does not decrease from room temperature to 350°C or higher. The range of use can be expanded as Furthermore, according to the present invention, as shown in the results of implementation in FIG. 2, it is possible to obtain a damping steel plate whose loss coefficient is ten times higher than that of the ordinary Zn-plated steel plate 5.

〔Example〕

The present invention will be described below with reference to drawings and graphs. FIG. 1 shows an A2 diagram of a production line for a damping metal plate for ultra-high temperatures according to the present invention, and in this example, the case where two copper strips are used as the metal plates will be explained. .

In the figure, ζ, la, and lb are copper strips supplied from an uncoiler (not shown), and Zn plating has been previously applied to the opposing surfaces of these copper strips. Reference numeral 2 denotes a superplastic alloy powder scattering device, in which Al powder 3 is uniformly dispersed as superplastic alloy powder onto the Zn-plated steel strip tb. Then, the steel strip 1b sprinkled with AN powder 3 is overlapped with the Zn-plated steel strip 1a sent from the other uncoiler at the position of the deflation crawl 4, and 8! The powder is sandwiched between both copper bands and sent into the heating furnace 5. The stacked steel (iHa, lb) is heated in the furnace 5, and only the Zn plated on the belt is melted and unmelted Aj! powder is mixed in, or the above Zn and Al powder are mixed together. ,
In the molten state, both copper strips are bonded by the superplastic alloy layer formed between them. After being heated to the required temperature for the required time, the two W4 strips 1a and lb are crimped and integrated by the pressure roll 6 on the exit side of the heating furnace 5, forming one composite steel strip ( The damping steel strip is formed into a damping steel strip) lc, cooled by passing through a cooling device 7, passed through a pinch roller 8, and wound around a coiler 9.

In addition, instead of Al powder as the superplastic metal interposed between the copper strips, Aj! A similar damping steel strip can be obtained by interposing foil.

The above example shows an example in which two Zn-plated steel strips are used as the metal plates, but when using an Al plate as the metal plates,
As the superplastic alloy interposed between the /l plates, Zn powder or the like is used. In addition, when combining an Al plate and a steel plate as a metal plate, the steel plate is a Zn-plated steel plate, and Aj! Place the plates on top of each other and heat them.

In any of the above cases, the melting point Tm of the metal plate that becomes the composite metal plate is Tm≧600, taking into account the melting point of 8l.
``C.

Next, one example according to the present invention and its results will be shown.

Steel plates with a thickness of 0.8 wa were used as the two metal plates, and one inner side of the plates was plated with Zn at a basis weight of 45 g/or or less. Then, by the method shown in Fig. 1, Aj! grain size of 50 μm is placed between the steel plates. The powder was uniformly spread and bonded by heating at 500C for 20 seconds in an Ar atmosphere in a heating furnace 5. As a result, the relationship between the loss coefficient and the operating temperature ("C) of the obtained steel sheet is as shown in Figure 2, and it can be seen that it has high vibration damping properties from room temperature to 350 °C. Number 5 indicates only one single-sided Zn-plated steel plate.

〔Effect of the invention〕

As explained above, according to the present invention, the
Steel plates and other metal plates with vibration damping properties can be obtained over a temperature range of 300°C, compared to 150"C or less for conventional vibration damping steel plates with resin interposed for high temperature use.
It was possible to obtain a damping metal plate for ultra-high temperatures whose loss coefficients are almost comparable at temperatures of up to 350°C. As a result, it can now be used as a material for engine-related parts and exhaust system parts, which could not previously be used, making it possible to significantly expand the range of applications.

[Brief explanation of the drawing]

Figure 1 is a conceptual diagram of the production line for ultra-high temperature vibration damping metal plates according to the present invention, and Figure 2 compares the present invention and a conventional example with respect to the applicable temperature range and 11 lapse coefficient (damping performance) of the product. This is a graph. la, lb...metal plate, lc...vibration damping metal plate.

Claims (1)

[Claims] (1) A method for manufacturing a vibration-damping metal plate for ultra-high temperatures, which comprises interposing a superplastic alloy between metal plates and bonding and integrating the metal plates by heating.