JPS61213485A - Hot hydrostatic press device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a hot isostatic press device, and in particular, it is capable of simplifying the pretreatment work of objects to be treated and performing high-quality treatment. This relates to a hot isostatic press device that is capable of

(Prior art) Hot isostatic pressure treatment (hereinafter referred to as "former P treatment") refers to the treatment of powder, etc. under heating conditions of 1000°C to 2000°C for 10
This is a processing method that pressurizes and compresses to about 00 to 2000 kgf/cal. In this method, it is necessary to pre-treat the object to be treated in order to prevent voids from remaining in the treated product. This pretreatment is, for example, as described in Japanese Unexamined Patent Publication No. 58-77502, in which powder is filled into a thin metal capsule of a predetermined shape, the inside of the capsule is evacuated, and the capsule is heated under reduced pressure. This is the work of sealing the opening by TIG welding or the like.

(Problem to be Solved by the Invention) By the way, when the above-mentioned pretreatment is performed, the voids remaining in the product are certainly reduced and the quality of the product can be improved, but there are still quite a lot of voids in the product. It is known that voids remain and have a significant impact on product quality. Even if the inside of the capsule is evacuated as described above, since the powder has a large surface area, it is impossible to remove all the gas adsorbed on the surface of the powder. The remaining gas is adsorbed to
This is because they are released during the HIP process at high temperatures.

Moreover, a series of pre-treatments such as vacuum evacuation inside the capsule and sealing of the capsule as described above requires a great deal of effort, which is one of the reasons for the increase in the cost of HIP-treated products.

This invention was made to solve the above-mentioned conventional drawbacks, and its purpose is to perform high-quality 1(fP) processing with a small amount of remaining voids, and to further reduce the pretreatment work of the object to be processed. An object of the present invention is to provide a hot isostatic press device that can be simplified.

(Means for Solving the Problems) Therefore, the hot isostatic press apparatus of the present invention includes a processing chamber,
The apparatus includes an exhaust means arranged outside the processing chamber, and a communication means for communicating the inside of the capsule to be processed, arranged inside the processing chamber, with the exhaust means.

(Effect) As a result of the above, the inside of the capsule to be processed placed in the processing chamber is
I (It is now possible to exhaust air while performing IP treatment,
Therefore, it is also possible to remove gas released from the powder surface as the temperature rises. Therefore, it is possible to perform high-quality HIP processing with extremely few remaining voids due to gas.

In addition, there is no need for complicated pre-treatments such as evacuation of the capsule and sealing of the capsule, or cold-open molding and preliminary sintering of the powder, as in the past.
It is possible to perform processing.

(Example) Next, specific examples of the hot isostatic press apparatus of the present invention will be described in detail with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a processing chamber, and this processing chamber 1 is formed by a cylindrical peripheral wall 2 and upper and lower lids 3.4 that close both upper and lower ends of this peripheral wall 2. A through hole 5 is bored in the lower lid 4, and a ceramic vibro serving as a communication means is fitted into the through hole 5. One end of this vibro is introduced into the processing chamber 1, and the other end is led out to the outside of the lid 4, but the entire structure is designed to prevent crushing due to atmospheric pressure during HIP processing. It shall be formed with a thick wall and a small inner diameter so as to obtain the desired results. The outer end of the vibro is connected via a conduit 7 to a vacuum pump 8 serving as exhaust means.

On the other hand, in the processing chamber 1, a capsule 10 to be processed filled with powder 9 is placed.
It is thin-walled and press-molded into the shape shown in the figure. That is, this capsule 10 includes a storage section 11 in which the powder 9 is stored, a small diameter section 12 connected to the lower part of this storage section 11, and a radially expanded portion from the bottom of this small diameter section 12. It has a bulged portion 13.

First, the powder 9 is filled into the storage part 11 of the capsule 10, and the capsule 10 is placed in the processing chamber 1. In this case, the small diameter part 12 and the storage part 11 are
A filter 14 is installed between the two. Then, the small diameter portion 12 of the capsule 10 is fitted onto the outer periphery of the vibro, and the bulging portion 13 of the capsule 10 is fitted onto the outer periphery of the stepped portion of the lower lid 4, and then these are fitted onto the peripheral wall 2 and It is attached inside the upper lid body 3. At this time, the bulging portion 13 of the force bulb 10 is held between the stepped outer periphery of the lower lid 4 and the inner periphery of the peripheral wall 2, and the bulging portion 13 and the peripheral wall 2 are A packing 15 is interposed between them.

Then, with the capsule 10 arranged as described above, the vacuum pump 8 evacuates the inside of the capsule 10 via the vibro, and then performs the old P treatment. That is, by filling gas into the processing chamber 1, the pressure inside the chamber 1 is increased, and at the same time, the powder 9 inside the capsule 10 is heated by a heating means (not shown). By evacuating the inside of the capsule 10 while performing the HIP process in this way, it becomes possible to remove the gas released from the powder surface as the temperature rises, but as a result, the amount of voids due to residual gas is reduced. It becomes possible to perform high-quality old P processing with an extremely small amount. Further, unlike the conventional method, there is no need to perform complicated pretreatment operations such as evacuation of the inside of the capsule 10 and sealing of the capsule 10, so that the HIP process can be performed with high efficiency as a whole.

FIG. 3 shows a modified example of the capsule 10, in which the capsule 10 is not provided with the above-mentioned bulging portion 13 and the small-diameter portion 12 is fitted onto the outer periphery of the vibro. It has a structure in which a seal 16 is formed between the outer peripheral part and the small diameter part 12. In this embodiment as well, it is possible to perform HIP processing with high quality and high efficiency, as in the above embodiments.

FIG. 4 shows a modification of the communication means and the capsule 10.
The communication means in this case consists of a pipe 17 with a thick inner diameter and a small inner diameter attached to the upper lid 3, as shown in the figure, and the tip of this pipe 17 has a cup having a female threaded part 18. A ring 19 is rotatably mounted. On the other hand, a pipe 20 having a thick inner diameter and a small diameter is fixed to the upper end of the capsule 10 and communicates with the inside of the capsule 10, and a male threaded portion 21 is formed at the upper end of the pipe 20. That is, by screwing the male threaded portion 21 of the pipe 20 into the female threaded portion 8 of the coupling 19, both pipes 17, 204i can be connected. Note that the seal 22, each of the pipes 17, 20, and the cambling 19 are preferably made of ceramic such as carbon in consideration of pressure resistance and heat resistance. By joining both the vibrators 17.20 as described above, it becomes possible to exhaust the inside of the capsule 10 through both pipes 17.20 during the HIP process, resulting in high quality and high efficiency as described above. It becomes possible to perform HIP processing. In this case,
If the pipe 17 is made of a flexible material, workability can be improved.

Although the embodiments of the hot isostatic press device of the present invention have been described above, the device of the present invention is not limited to the above embodiments.
Various modifications and changes can be made within the scope of the purpose of this invention.

(Effects of the Invention) The hot isostatic press apparatus of the present invention is configured as described above, and therefore, the hot isostatic press apparatus of the present invention can produce high-quality HIP with a small amount of remaining voids.
In addition to being able to perform the HIP process, it is also possible to simplify the pre-processing work for the object to be processed, so it is also possible to improve the work efficiency of the entire HIP process.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the hot isostatic press apparatus of the present invention, FIG. 2 is an explanatory diagram showing an example of a capsule used in the above, and FIG. 3 is an explanatory diagram showing a modified example of the capsule, FIG. 4 is an explanatory diagram showing a modification of the communication means and the capsule. 1... Processing chamber, 6... Pipe, 8... Vacuum pump, 10... Capsule, 17.20... Pipe.

Claims (1)

[Claims] 1. A heat source characterized by having a processing chamber, an exhaust means arranged outside the processing chamber, and a communication means for communicating the inside of the capsule to be processed with the exhaust means arranged inside the processing chamber. isostatic press equipment.