JPH06116666A - Elastic body - Google Patents

Abstract

PURPOSE:To obtain an elastic body provided with high corrosion resistance, spring properties, nonmagnetic properties, hardness, strength, etc. CONSTITUTION:An Ni alloy having a compsn. constituted of, by weight, 14 to 23% Cr, 14 to 20% Mo, 0.2 to 5% W, 0.2 to 7% Fe and 0.2 to 2.5% Co, and the balance Ni with inevitable impurities is formed into a hot rolled stock, which is subjected to a solution treatment at 1100 to 1200 deg.C to form its structure into an austenitic one. Then, in such a state, it is subjected to plastic working at >=80% draft by cold working and is heated at 500 to 600 deg.C for >=5hr to produce an alloy in which fine Ni-Mo intermetallic compounds are precipitated into the matrix. From this alloy, a diapheragm 4 is formed and used for a pressure controlling means for controlling the flow rate of an acidic soln. and an alkaline soln. by the change of pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to, for example, a diaphragm,
The present invention relates to a metal elastic body which constitutes a contact material of a relay of an electric circuit, a leaf spring for supporting a magnetic head, and the like.

[0002]

2. Description of the Related Art Conventionally, the problems to be solved by the invention
For example, as a means for controlling the flow rate of an acidic liquid, an alkaline liquid, etc., there is a pressure control means using a diaphragm. One example thereof will be described with reference to FIGS. In the figure, an acidic liquid or an alkaline liquid flows into a lower chamber 2 constituted by a body 1 via a valve body (not shown) and flows out from an outlet (not shown). Body 1
The diaphragm chamber 3 located above the chamber 2 is partitioned by the diaphragm 4, and the peripheral edge of the diaphragm 4 is fixed to the body 1 by the ring 5.
Further, the diaphragm chamber 3 communicates with the chamber 2 via the communication port 6. When adjusting the flow rate, if the pressure on the upper side of the diaphragm 4 is changed, the diaphragm 4 is displaced accordingly and the hydraulic pressure in the diaphragm chamber 3 is changed. The pressure fluctuation in the diaphragm chamber 3 is transmitted to the chamber 2 through the communication port 6, and the inflow amount of the liquid through the valve body is adjusted according to the change in the liquid pressure in the chamber 2, thereby determining the outflow amount. Become.

By the way, as a material of such a diaphragm 4 for chemicals, stainless steel is used in consideration of elasticity as a diaphragm and corrosion resistance against an acidic liquid or an alkaline liquid. However, the diaphragm 4 made of stainless steel has a short life because it is corroded by an acidic liquid or an alkaline liquid. Further, as a material of the diaphragm 4 for such a chemical, there is no suitable material exceeding stainless steel having elasticity and corrosion resistance, so that the diaphragm 4 has to be replaced frequently, which is very complicated and costly. .

Next, the contact piece material used for the relay contact of the electric circuit will be described. As shown in FIG. 2, the relay contact piece 8 having the contact 8a is usually composed of two contacts 9,1.
It is located between 0 and contacts and separates both contacts 9 and 10 by the operation of a relay (not shown) to control conduction and interruption. As a material of the relay contact piece 8, a plate material having elasticity such as copper is used. However, such a material has a drawback that it is easily rusted, and is magnetized to cause malfunction.

Further, in the magnetic head device shown in FIG. 3, a magnetic head 13 which contacts the magnetic recording medium 12 is attached to a free end of a support arm 14. The support arm 14 is composed of a strip-shaped hard leaf spring 16 having one end fixed to the swing arm 15 and a soft leaf spring 17 swingably installed at the free end of the hard leaf spring 16. The magnetic head 13 is attached to the lower surface of the spring 17. When the magnetic recording medium 12 is stopped,
The magnetic head 13 is pressed by the elastic force of the hard leaf spring 16 and comes into contact with the magnetic recording medium 12 with a predetermined contact pressure. or,
With the rotation of the magnetic recording medium 12, air is generated in the magnetic recording medium 1.
When it flows into the lower side of the slider surface of No. 2, the magnetic head 13
Is tilted at a predetermined angle with respect to the hard leaf spring 16 to obtain lift,
It floats against the pressing force of the hard leaf spring 16.

By the way, the hard leaf spring 16 of the support arm 14 for pressing and holding the magnetic head 13 needs to have a stable elastic force, whereby the magnetic head 13 is brought into contact with the magnetic recording medium 12 at a constant pressure. And magnetic recording medium 1
At the time of rotation of 2, it is necessary to keep them separated by a predetermined distance. The hard leaf spring 16 is usually formed of an elastic member such as stainless steel, but in order to meet the demand for size reduction and weight reduction of the device, the support arm 14 is required to be further reduced in size and weight. ing.
However, the conventional hard leaf spring 16 made of stainless steel or the like is used.
However, it was difficult to further reduce the size and weight while maintaining its strength and function.

In view of the above problems, it is an object of the present invention to provide a non-magnetic elastic body having high corrosion resistance, spring property and the like.

[0008]

The elastic body according to the present invention comprises:
% By weight, Cr: 14-23%, Mo: 14-20%,
W: 0.2-5%, Fe: 0.2-7%, Co: 0.2
˜2.5%, the balance being Ni and an unavoidable impurity, and a Ni alloy having a composition, which is formed by rolling processing.

Further, the elastic body described above is a diaphragm.

The above-mentioned elastic body is a relay contact piece of a relay contact.

The elastic body is a leaf spring for supporting the magnetic head.

[0012]

[Function] The Ni alloy forming the elastic body is Ni-
Since the Mo-based intermetallic compound is finely and uniformly dispersed, it has a high hardness of 57 or higher in HRC, and also has high corrosion resistance, spring property, non-magnetic property, etc., and thus suppresses corrosion of the elastic body. The life of the elastic body can be extended and the function as the elastic body is high.

When the flow rate of the acidic liquid or the alkaline liquid is controlled by the diaphragm, the corrosion due to these liquids can be suppressed, the displacement with respect to the pressure change can be sensitively and quickly transmitted, and the restoring force is high.

Since the relay contact piece has high corrosion resistance and is not magnetized, the opening and closing operation of the relay is accurate and the durability is high.

Since the leaf spring for supporting the magnetic head can be formed thin, small and lightweight and has high spring property, toughness, strength and the like, the elastic performance is stable and the durability is high.

[0016]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The first embodiment of the present invention relates to a diaphragm, which will be described with reference to FIG. In the first embodiment, a Ni alloy obtained under the following composition and manufacturing conditions is used as the metal forming the diaphragm shown in FIG. That is, in weight%, Cr: 14 to 23%, Mo:
14 to 20%, W: 0.2 to 5%, Fe: 0.2 to 7
%, Co: 0.2 to 2.5%, balance Ni and unavoidable impurities, an Ni alloy ingot is subjected to hot forging and hot rolling under normal conditions to obtain a hot rolled material. The hot rolled material is subjected to solution treatment under normal conditions (1100 to 1200 ° C.) to form an austenite structure. Then, in the state of the austenite structure, cold working is applied to the plastic working of a working rate of 80% or more, and then this is heated at 500 to 600 ° C. for 0.5 hour or more to obtain a fine Ni-Mo-based intermetallic material. The compound can be deposited in the matrix. still,
Precipitation can be promoted by aging this. The Ni alloy thus obtained has a hardness of HRC57 or more and high strength, and also has high corrosion resistance, springiness, nonmagnetic property, and
It has toughness, wear resistance, and heat resistance.

Therefore, when the diaphragm 4 shown in FIG. 1 is molded and used as an elastic body from the Ni alloy manufactured in this way, it is more acidic or alkaline than the conventional stainless steel. When controlling the flow rate, the corrosion resistance is improved against acid and alkali. Moreover,
Since the elasticity, toughness, hardness, etc. are high, the responsiveness and durability of the diaphragm 4 are also improved.

Next, the reasons why the above-mentioned composition and manufacturing conditions of the Ni alloy constituting the diaphragm 4 according to this embodiment are limited as described above will be explained. A. Component composition a) Cr The Cr component has a function of significantly improving the passivation ability of the austenite matrix and improving the corrosion resistance, but if the content thereof is less than 14%, the corrosion resistance is particularly remarkable in an oxidizing atmosphere. And the content is 23
%, The austenite structure becomes unstable, and it becomes impossible to stably form a structure in which a fine Ni-Mo intermetallic compound is precipitated in the austenite matrix, which causes a decrease in corrosion resistance. Its content was limited to 14-23%.

B) Mo The Mo component has a function of improving the strength by forming a Ni-Mo intermetallic compound which is combined with Ni and finely and uniformly disperses and precipitates in the matrix as described above. Amount is 14%
If the content is less than this, the desired effect is not obtained, while if the content exceeds 20%, the hot and cold rollability is deteriorated, so the content is set to 14 to 20%. Limited c) WW component has the action of forming a solid solution in the austenite matrix to improve the strength, but if its content is less than 0.2%, the desired strength improvement effect cannot be obtained, while its content is 5 %, The hot and cold rollability will deteriorate, so the content was limited to 0.2-5%.

D) Fe Fe component has an effect of improving hot and cold rolling properties, but if its content is less than 0.2%, the desired effect cannot be obtained on this function, while its content If the amount exceeds 7%, the strength will decrease, so the content should be 0.2
Limited to ~ 7%. e) Co The Co component has the function of forming a solid solution in the austenite matrix and stabilizing it to promote the stable precipitation of the intermetallic compound during the precipitation hardening treatment. No effect is obtained on the other hand, and on the other hand, even if the content exceeds 2.5%, no further improvement effect is exhibited by this action. Therefore, considering the economic efficiency, the content is set to 0.2-2. 5%
Limited to.

B. Manufacturing conditions a) Cold rolling ratio If the cold rolling ratio is less than 80%, precipitation of the intermetallic compound by precipitation hardening after cold rolling is not sufficiently performed, and in this case,
Since it becomes impossible to obtain a hardness of 57 or more by HRC, the cold rolling rate was limited to 80% or more. In addition, when performing this cold working, 3 per 1 pass with a cold rolling mill.
If cold rolling is continued so that the total reduction rate (working rate) is 80% or more at a reduction rate of ˜4%, a thin sheet of Ni alloy is obtained. The hardness of the thin plate at this stage is H due to work hardening.
It becomes 50 or more in RC. The processing rate is more preferably 95% or more. 95% of Ni alloy of the above composition
In order to carry out processing at the above processing rates, it is possible to carry out processing by using a cemented carbide roll. In this way, it is possible to obtain a thin plate of 60 or more by HRC by processing to 95% or more and performing precipitation hardening treatment as described later.

B) Precipitation hardening treatment If the above-mentioned thin plate is heated at a temperature of 500 to 600 ° C for 0.5 hours or more, an intermetallic compound is precipitated and the hardness is HR.
It becomes 57 or more in C. Here, if the treatment temperature is lower than 500 ° C., it takes a long time to precipitate the intermetallic compound, which is not desirable in terms of productivity. On the other hand, if the temperature exceeds 600 ° C.,
Since the ratio of the alloy components that form a solid solution in the austenite matrix increases, the precipitation of intermetallic compounds cannot be satisfactorily performed, and it becomes impossible to obtain a hardness of 57 or more by HRC, so the temperature is set to 500 to Limited to 600 ° C.

If the thin plate of the Ni alloy thus obtained is formed into the shape as the diaphragm 4,
When used in the pressure control means shown in FIG. 1, since it has high corrosion resistance to the acid liquid or alkaline liquid to be controlled, durability is extended, and further, it has high springiness and toughness.
The response to pressure changes is faster.

As described above, in this embodiment, since the diaphragm 4 is made of the Ni alloy manufactured by the composition and the manufacturing conditions as described above, it is possible to improve the corrosion resistance against the acidic liquid and the alkaline liquid, and to improve the corrosion resistance. The diaphragm 4 can be provided with springiness and toughness, so that the durability of the diaphragm 4 is improved and the responsiveness of the diaphragm itself is improved.

Next, a second embodiment of the present invention will be described with reference to FIG. In the relay contact shown in FIG. 2, the Ni alloy manufactured by the above-described method is used as a material for forming the relay contact piece 8. By using the relay contact piece 8 configured as described above, since it has high corrosion resistance and non-magnetism, it is hard to rust, there is no risk of malfunction due to magnetism, and high springiness and toughness prevent contact failure. It is possible to improve durability.

Next, a third embodiment of the present invention will be described with reference to FIG. In the present embodiment, the support arm 14 of the magnetic head device, particularly the hard leaf spring 16, is made of the Ni alloy manufactured by the above method. By using the hard leaf spring 16 configured as described above, since the hard leaf spring 16 has high strength and high hardness and high springiness and toughness, the hard leaf spring 16 can be made thinner than the conventional one without lowering its function. It can be made small and lightweight. Moreover, since it has a high spring property, it can be reliably used for a long period of time.
The magnetic head 13 can be brought into contact with the magnetic recording medium 12 at a constant pressure, and can be held at a predetermined distance when the magnetic recording medium 12 is rotated, which can withstand long-term use and exhibit stable and better elastic characteristics. There is also an advantage that durability is improved.

The elastic body according to the present invention is not limited to the diaphragm, the relay contact piece, and the hard leaf spring 16 according to each of the above-described embodiments, but can be used for other appropriate elastic bodies. For example, the connecting terminal 2 of the connector 19 shown in FIG.
No. 0, or an elastic member such as a terminal 21 connected thereto, the strength and crimping force of each connecting portion can be increased, and the corrosion resistance and durability can be improved.

[0028]

As described above, the elastic body according to the present invention is
Since it is made of a rolled Ni alloy, it is possible to improve the corrosion resistance, springiness and non-magnetism of the elastic body, as well as the hardness and strength, etc. to improve durability and other important practical advantages. There is.

[Brief description of drawings]

1A and 1B show a pressure control means using a diaphragm, in which FIG. 1A is a longitudinal sectional view of a main part and FIG. 1B is a plan view thereof.

FIG. 2 is a diagram showing a relay contact of an electric circuit.

3A and 3B show a magnetic head device, in which FIG. 3A is a side view of a main part and FIG. 3B is a partial plan view.

FIG. 4 is a perspective view of a connector and a terminal.

[Explanation of symbols]

 4 Diaphragm 8 Relay contact piece 14 Support arm 16 Hard leaf spring

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[Procedure amendment]

[Submission date] November 27, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004] Further, when the Next relay contact connection pieces material used in the electric circuit will be described, as shown in FIG. 2, Li Le <br/> over contact piece 8 is usually between two contacts 9,10 The contact points 9 and 10 are brought into contact with and separated from each other by the operation of a relay (not shown), so that conduction and interruption are controlled. As a material for the relay contact piece 8, a plate material having elasticity such as copper is used. However, such a material has a drawback that it is easily rusted, and it is magnetized to cause malfunction.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 2

[Correction method] Change

[Correction content]

[Fig. 2]

Claims (4)

[Claims] 1. By weight%, Cr: 14 to 23%, Mo: 1
4 to 20%, W: 0.2 to 5%, Fe: 0.2 to 7%,
Co: 0.2 to 2.5%, an elastic body formed of an alloy obtained by rolling a Ni alloy having a composition of balance Ni and unavoidable impurities. 2. The elastic body according to claim 1, wherein the elastic body is a diaphragm. 3. The elastic body according to claim 1, wherein the elastic body is a relay contact piece of a relay contact. 4. The elastic body according to claim 1, wherein the elastic body is a magnetic head supporting leaf spring.