JPS61169102A - Manufacture of composite type vibration-damping steel sheet - Google Patents

Abstract

PURPOSE:To manufacture inexpensively a steel sheet excellent in workability and vibration-damping properties by rolling the laminated stocks obtained by overlapping the coated layers of the stocks, having each a coated metal layer of specific thickness, formed by spraying metals on the sheet surfaces of rolling stocks respectively, after soaking them at a prescribed temperature. CONSTITUTION:One or more kinds of Ni, Cr, Co, Ti, Mg, Mn, A, Zn and Cu or an alloy of Fe and these metals are used for spraying materials. A sprayed metal layer 4 of 0.1-10mm thickness is formed on the sheet surface of a rolling stock 2, and the layers 4 of two stocks 2 are overlapped to join them together into a laminated stock by welding the circumferences of the overlapped parts to each other, etc. After soaking the laminated stocks in the ordinary heating furnace used for rolling within a range of 800-1,300 deg.C, they are rolled under a >=1.5 draft into a steel sheet. A composition-type vibration-damping steel sheet obtained in such manner, has the vibration-damping properties equal to those at normal temperature even at a high temperature of 400-500 deg.C.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a composite type vibration damping steel plate, and particularly relates to a method for manufacturing a composite vibration damping steel plate.
The present invention relates to a method for inexpensively manufacturing a composite vibration damping steel plate that has normal temperature distribution properties even at high temperatures of ~500°C and has excellent formability and weldability, and is utilized in the field of manufacturing composite vibration damping steel plates.

[Conventional technology]

BACKGROUND ART Conventionally, a composite damping steel plate is known in which two steel plates are joined in a sandwich-like manner using a polymeric material such as rubber, asphalt, or plastic as an adhesive.

However, the conventional composite vibration damping steel plate having such a structure has the following drawbacks.

(Ij) The above-mentioned viscoelastic polymeric material deteriorates when the temperature of the environment in which it is used rises above 60 to 70°C, and its vibration damping properties are significantly reduced.

(b) Viscoelastic materials have low strength and bond strength with steel plates, so they often peel off when bent or twisted. (c) Viscoelastic materials have almost no electrical conductivity, so resistance spot welding is difficult. It can't be done easily. Further, during arc welding, gas is generated due to the combustion of the adhesive, which not only causes problems in terms of workability and health and safety, but also tends to cause welding defects.

As a solution to the above drawbacks, for example, JP-A-57-2
In 02965, An, Zn was used instead of the viscoelastic material.
A method of manufacturing a composite damping steel plate using a plated layer of , Cu, etc. has been proposed, but this method has the following problems.

(a) It is difficult to make the plating layer, which is the intermediate layer, an alloy composition that has vibration damping properties.

(Naka) Costs will go up because used plating waste liquid will be processed from a safety and hygiene perspective.

(c) If the type of metal to be used changes, it is necessary to use a different plated cypress, so when incorporating it into the manufacturing process, the JR construction line becomes complicated and industrialization is difficult.

[Problem that the invention seeks to solve]

An object of the present invention is to solve the problems of the prior art as described above, and to provide a method for inexpensively manufacturing a composite vibration damping steel plate that does not have deterioration in its allocating properties even at high temperatures and has excellent formability and weldability. It is in.

[Means and operations for solving the problems] The gist of the present invention is as follows.

That is, there is a step of forming a metal sprayed layer with a thickness of 0.1 to 10 cm on the plate surface of the rolled material, and a laminated material is formed by overlapping the sprayed layers of the rolled material having a plurality of metal sprayed layers.
A composite damping steel plate comprising the steps of soaking within a temperature range of ~1300°C, and rolling the sandwiched material after soaking within the soaking temperature range. Production method.

Conventionally, thermal spraying has been put into practical use as a method for simply and inexpensively coating metals. This thermal spraying method has the advantage of being able to coat two or more types of metals by mixing them in a desired chemical composition, and can provide a thicker layer than the plating method. Furthermore, there is no problem with waste liquid treatment in this thermal spraying method and plating method, and there are no restrictions on the material or size of the target steel plate.

In the method of the present invention, a thermal spray coating is applied to one or both sides of rolled materials such as steel plate slabs, sheet bars, and rolled secondary materials by this thermal spraying method, and the coating layers are stacked so as to match and the surrounding areas are joined by welding or the like. Then, soaking and rolling are performed in the normal plate manufacturing process. Here, the soaking process and the rolling process are normal process operations and do not require any special equipment or equipment, so that the divided steel plate can be obtained at an extremely low cost.

Thermal spray material 1dNi, Cr, Co, Ti, Mg
, Mn, Al1.

One or more of Zn and Cu, or an alloy of these metals and Fe is suitable. Further, during thermal spraying, the above metals may be mechanically mixed and sprayed as an alloy layer, or a film may be formed by thermal spraying in multiple layers.

The thickness of the thermally sprayed coating is determined by the thickness of the material to be thermally sprayed and rolled and the reduction ratio in the rolling process, but a coating thickness of 0.1 to 10 cm is preferable. The thickness of the metal spray layer before rolling is 0.
If it is less than 1 m, it will become even thinner due to rolling and the damping effect will be lost, so the lower limit was set to 0.1 m. However, if the thickness of the metal sprayed layer exceeds 10 mm, the metal sprayed layer will easily peel off during thermal spraying, so the upper limit was limited to 10 mm. The surface to be thermally sprayed is one or both sides of the rolled material. In FIGS. 1 and 2, the outer rolled material 2 has a metal sprayed layer 4 on one side, and the two central rolled materials in FIG. 2 have a metal sprayed layer 4 on both sides.

Next, after forming the metal spray layer 4 on the rolled materials 2 and 2A, the first
As shown in the figure or FIG. 2, they are stacked to form a laminated material, the periphery of which is joined by a method such as welding, and soaked in a heat treatment furnace before normal thick plate rolling. Through this soaking process, the polymetallic sprayed layer 4 is diffused into the rolled material 2.2 that is the base material,
The metal sprayed N4 and the base material come to have strong adhesion.

In the soaking process, the thermal spraying material is Aλ, Zn, which has a low melting point.

In the case of Cu, etc., it becomes molten at 800° C., but by joining the periphery, it is possible to prevent it from flowing outside. The temperature for soaking and rolling was limited to a temperature range of 800 to 1300°C, since rolling the slab would be difficult if the temperature was less than 800°C, and if it exceeded 1300°C, the hearth of the heat treatment furnace would be seriously damaged.

The rolling reduction ratio in hot rolling after soaking is determined by the thickness of the rolled material used, but it is desirable to set it to 165 or more because it has a great effect in compressing a plurality of laminated materials. Through hot rolling, the intermediate sprayed metal layer adheres closely to the base material, resulting in a composite damping steel plate with excellent formability. Furthermore, since the multilayer metal sprayed layer contains pores, vibration damping properties are improved.

The composite damping steel plate of the present invention is a laminated material of metal sprayed layers and does not use a polymeric viscoelastic material, so it has a
Even at a high temperature of 500°C, it has the same vibration damping properties as at room temperature.

〔Example〕

It has the chemical composition shown in Table 1 and has dimensions of thickness 1230 and width 1.
One side of two slabs with a thickness of 500 mm and a length of 3000 m was coated with a thermal spray material mechanically mixed with 20% Al and 80% Zn in a thickness of 3 m by a plasma spraying method.

The sprayed surfaces of the rolled material having the metal sprayed layer were overlapped as shown in FIG. 1, and the periphery was welded. The welded laminate was placed in a furnace whose soaking temperature was maintained at 950° C. and soaked for 2 hours.

After soaking, hot rolling was performed to obtain a plate thickness of 4.1. The sprayed metal layer was approximately 0.1 m thick.

A strip-shaped test piece was cut from the manufactured composite vibration-damping steel plate, and the vibration was investigated using the mechanical impedance method. The loss coefficient was approximately 0.8 at both 20°C and 200°C.
The damping properties were hundreds of times higher than that of the single-structure steel plate 0,001.

Further, the test pieces were subjected to arc welding and spot welding, and the welding was performed with good workability. Furthermore, the 180 degree close contact curve, which indicates workability, did not peel off in the test and showed excellent results.

〔Effect of the invention〕

As is clear from the above examples, the present invention involves forming a sprayed metal layer with a thickness of 0.1 to 10 cm on a rolled material, stacking them as a laminate, and soaking them in a temperature range of 800 to 1300°C. By rolling, it was possible to inexpensively produce a composite vibration damping steel plate that maintains damping properties equivalent to those at room temperature even at high temperatures and has excellent formability and weldability.

[Brief explanation of drawings]

The drawings all show a stacked laminate of rolled materials having a metal sprayed layer according to the present invention, with FIG. 1 being a cross-sectional view showing two sheets stacked, and FIG. 2 a three-sheet stack. 2. 2 people...Rolled material 4...Metal sprayed layer agent Patent attorney Takeo Nakaji Figure 1 Figure 2 2A Mangen Kaiju

Claims (2)

[Claims] (1) forming a metal sprayed layer with a thickness of 0.1 to 10 mm on the plate surface of the rolled material; and forming a laminated material by overlapping the sprayed layers of the rolled material having a plurality of metal sprayed layers;
A method for manufacturing a composite damping steel plate, comprising the steps of soaking within a temperature range of 1300°C, and rolling the laminate after soaking within the soaking temperature range. . (2) The method for manufacturing a composite damping steel sheet according to claim 1, wherein the metal sprayed layer is a single metal layer, a composite layer of two or more different metals, or an alloy layer.