JPH0647675A - Shot blast particle - Google Patents

Abstract

PURPOSE:To increase the processing effect as shot blast particles and to extend the service life by forming an amorphus material into particles of a spherical form, a chip form, a flat form, and the like. CONSTITUTION:An amorphus material is formed in a spherical form, a chip form, a flat form, and the like, and used as shot blast particles. As a result, a cutting or grinding process of the surface of a work piece by the high tenacity and the high strength of an amorphus metal, and an injection processing effect of giving a distortion or removing a distortion by a shock, can be increased extensively. Furthermore, an amorphus metal has the excellent mechanical properties such as a high elastic limit and a high rupture strength, and a high corrosion resistance, and thereby, no snapping or no breaking is generated by the shock with a work piece, and it has an excellent abrasion-proof property and a long service life.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to shot blast particles.

[0002]

2. Description of the Related Art Shot blasting is a jetting process in which solid particles are accelerated by a pressurized fluid and jetted at high speed from a nozzle to collide with the surface of a workpiece to scrape or distort the surface to be processed. Is. The shot blast particles used for this processing are hard and tough, and it is necessary to have a cutting edge. Conventionally, fused alumina, silicon carbide, steel grids and other various kinds of artificial abrasive particles are often used. However, it has a drawback that it is easily broken and broken, and it wears down, so that it has a short usable life.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide artificial particles having a high processing effect as the shot blast particles and a long service life.

[0004]

[Means for Solving the Problems] Amorphous material is formed into particles having a spherical shape, a chip shape, a flat shape or the like.

[0005]

In the present invention, the amorphous material is used as described above, and the amorphous material is formed into particles having a spherical shape, a chip shape, a flat shape or the like and used as shot blast particles. Depending on the strength, it is possible to remarkably enhance the effect of cutting and grinding of the surface of the workpiece, injection of distortion due to impact, or injection processing such as distortion removal. Amorphous also has excellent mechanical properties such as high elastic limit and high fracture strength, and has extremely high corrosion resistance. Therefore, it does not break or break due to impact with the work piece, has excellent wear resistance, and has a long service life. It can be used for a long time.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to an embodiment of the drawings. FeCrPC system, CoSiB for amorphous metal
A variety of alloys such as Fe-based and FeNiPC-based are known. Especially when the centrifugal quenching method is used for producing the amorphous metal, it is possible to mass-produce a homogeneous material. The principle of this centrifugal quenching method is that a metallic liquid is intermittently sprayed onto a cooling disc that rotates at a high speed, and is blown away by a centrifugal force to quench the liquid.

For example, in a Fe ₇₂ Cr ₈ P ₁₂ C ₁₀ alloy, a metal solution is applied with a pressure of 50 kg / cm ² to make the diameter 1
Eject from a mmφ nozzle and hit the rotating disk to 800
Particles having a long / short ratio of 1.5 and an aspect ratio of 100 to 200 were obtained by accelerating to a speed of m / s and rapidly cooling at 10 ⁻⁵ ° C./S. This hardness is 850 Hv and the tensile strength is 380 kg.
/ Mm ² , elongation 0.05%.

Next, the amorphous particles thus produced were used for shot blasting. The processing is performed by using a jet nozzle having a diameter of 6 mmφ. Using the amorphous particles having a particle size of 50 to 100 μm,
About 350m with air pressure of 5kg / cm ² from the nozzle
When sprayed at a speed of / s and impacted on a steel material having a hardness of 420 Hv to perform strain relief processing, particles were scarcely damaged and had extremely high wear resistance. Further, the amount of dust during the impact treatment was extremely small (-35%), and the recovery of particles was about 94% by magnetic separation utilizing the high magnetic characteristics of the amorphous material.

FIG. 1 is a graph showing a comparative test of the service life of the amorphous particles of the present invention and the conventional shot particles. The horizontal axis is the shot hardness and the vertical axis is the number of shots. As a result, the life of the amorphous material is 5 compared to conventional shot grains.
It can be seen that the useful life is 10 times or more.

The present invention has been described above with respect to shot blast particles in which amorphous material is formed into particles having a spherical shape, a chip shape, a flat shape, or the like. Shot blasting particles can be produced by molding into particles.

For example, 60% of amorphous powder and 40% of phenol resin are mixed, and this is made into particles (billet-like chips). The particle shape is 0.5 mm in diameter and 2 in length.
formed to mm. When these particles were shot blast ground on a metal surface, the surface could be beautifully polished to a glossy surface.

[0012]

As described above, according to the present invention, an amorphous material is used and formed into particles having a spherical shape, a chip shape, a flat shape or the like and used as shot blast particles. In addition, due to the high strength hardness and the like, it is possible to remarkably enhance the effect of the injection processing such as cutting, grinding, imparting distortion due to particle impact, or removing distortion on the surface of the workpiece. In addition, the amorphous material has excellent mechanical properties such as high elastic limit, high fracture strength, and high hardness, and is also a material with high corrosion resistance, so that it does not break or break due to impact with the work piece, It has high wear resistance and can be used for a long life. Further, when repeatedly used, the magnetic characteristics of the amorphous material are used for magnetic separation, so that the recovery rate is improved and the utilization efficiency for a long life can be remarkably increased.

[Brief description of drawings]

FIG. 1 is a life comparison experiment graph of the present invention and a conventional one.

Claims (2)

[Claims] 1. A shot blasting grain characterized by being formed by forming an amorphous material into particles having a spherical shape, a chip shape, a flat shape or the like. 2. A shot blasting grain characterized by being formed by mixing an amorphous material with a resin and forming the mixture into spherical, chip, and flat shaped particles.