JPH09195015A - Steel ball for playing and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce a steel ball for playing capable of obtaining sufficient corrosion resistance without applied with Cr plating. SOLUTION: This nonplated steel ball for playing has a componental compsn. contg., by weight, 0.10 to 0.9O% C, 15.0 to 17.0% Cr, 1.0 to 3.0% Ni, <=1.00% Si, <=1.00% Mn, <=0.030% P, <=0.030% S, <=0.060% N and <=0.010% O, and whose surface is formed of a glossy skin by grinding or ceramics vapor- deposited coating.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a game steel ball used in games such as pachinko and smart balls.

[0002]

2. Description of the Related Art Amusement steel balls used in games such as pachinko and smart balls are, for example, JIS G 3
507 "Carbon steel wire rod for cold heading SWRCH 10-1
5 (C: 0.08 to 0.18%, Si: 0.35% or less, Mn: 0.30 to 0.60%, P: 0.040% or less, S: 0.040% or less) As a result, this steel material is rolled into a steel wire rod, and this steel wire rod is drawn to form a steel wire rod for header processing with a required diameter.The steel wire rod for header processing is cut into the required length and then header processed. To a spherical shape, deburring with a grinder, polishing, and carburizing and tempering after making necessary markings, polishing for scale removal, lapping, and Cr plating. After that, it was barrel-polished to produce shiny play steel balls.

[0003]

However, in the conventional play steel balls, the surface is plated with Cr by using carbon steel as a raw material. Therefore, Cr plating equipment is required, and Cr plating is required. There is a problem of environmental pollution due to, the need to clean the steel ball from time to time, the Cr plating is peeled off and damages to play equipment such as pachinko machines, the rust is likely to occur on the steel ball, and rusting occurs. If you add anti-rust oil to prevent it, the user will feel uncomfortable,
There are problems such as the large amount of steel balls to be disposed of, and the problem was to solve such problems.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and since good corrosion resistance can be obtained without Cr plating, plating treatment by applying Cr plating is performed. Eliminate problems such as necessity of equipment, impact on environmental pollution, damage to amusement equipment, ball sales equipment, ball transfer equipment, etc. due to plating peeling, discomfort due to adhesion of rust preventive oil for rust prevention It is an object of the present invention to provide an amusement steel ball and a method for producing the same, which can reduce the amount of steel balls to be discarded.

[0005]

A play steel ball according to a first embodiment of the present invention has a weight percentage of C: 0.10 to 0.90%, Cr, as described in claim 1. : 9.0-1
1.0%, and the balance consists of Fe and impurities. In some cases, B: 0.001 to 0.010%, Ca:
0.001-0.010%, Al: 0.005-0.0
It is characterized by containing one or more of 30%, and in some cases, as described in claim 3, Si: 0.80% or less, Mn: 1.50% or less, P: 0.030% or less, S: 0.030% or less, N
i: 1.00% or less, N: 0.060% or less, O: 0.
The feature is that it is 010% or less.

The play steel ball of the second embodiment according to the present invention has a weight ratio of C:
0.10 to 0.90%, Cr: 9.0 to 11.0%, M
o: 1.00% or less, and the balance Fe and impurities are included.
B: 0.001-0.010 as described in
%, Ca: 0.001 to 0.010%, Al: 0.00
It is characterized by containing one or more of 5 to 0.030%, and in some cases, as described in claim 6, Si: 0.20% or less, Mn:
0.15% or less, P: 0.030% or less, S: 0.03
0% or less, Ni: 1.00% or less, N: 0.060% or less, O: 0.010% or less are featured.

The play steel ball of the third embodiment according to the present invention has a weight ratio of C:
0.10 to 0.90%, Cr: 15.0 to 17.0%,
Ni: 1.0 to 3.0%, and the balance Fe and impurities. Si: 1.00% or less and M as the case may be.
n: 1.00% or less, P: 0.030% or less, S: 0.
030% or less, N: 0.060% or less, O: 0.010
It is characterized by having been set to less than or equal to%.

In the play steel ball according to the present invention, as described in claim 9, the surface has a polished surface by barrel polishing or the like.
As described in (1), the surface may be colored skin having a metal, cermet or ceramics coating vapor deposition film by physical vapor deposition, ion plating or the like.

Further, the method for manufacturing a play steel ball according to the present invention requires, as described in claim 11, a steel material having the component composition according to any one of claims 1 to 8 by drawing. Diameter steel wire, cut this steel wire to the required length, then cold or warm forging (for example,
It is characterized in that it is subjected to header processing in cold or warm) to make it into a spherical shape, and after making necessary engraving, it is subjected to quenching and tempering treatment, and then polished to give a glossy surface.

In some cases, as described in the twelfth aspect, after gloss finish, metal or cermet or ceramics vapor deposition is performed so that the surface is colored skin by the metal, cermet or ceramics coating vapor deposition film. You can also do it.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The play steel ball according to the first embodiment of the present invention has a weight% content as defined in claim 1.
C: 0.10 to 0.90%, more preferably 0.30
0.65%, more preferably 0.45 to 0.50%,
Cr: 9.0 to 11.0%, more preferably 9.4 to 1
0.9%, and the balance Fe and impurities, and in some cases, as described in claim 2, B: 0.001 to 0.010%, Ca:
0.001-0.010%, Al: 0.005-0.0
It is characterized by containing one or more of 30%, and in some cases, as described in claim 3, Si: 0.80% or less, more preferably 0.
15% or less, Mn: 1.50% or less, more desirably 0.35% or less, P: 0.030% or less, more desirably 0.025% or less, S: 0.030% or less, more desirably 0. 0.015% or less, Ni: 1.00% or less, more desirably 0.70% or less, N: 0.060% or less, more desirably 0.030% or less, O: 0.010% or less, more desirably It is characterized in that the content is 0.005% or less, but the play steel ball of the first embodiment will be further described.

In the play steel ball of the first embodiment, C
Has a C content of 0.10% or more, more preferably 0.30% or more, still more preferably 0.45% or more so that the required hardness can be obtained after quenching and tempering. If the amount of carbide is too large, the amount of carbides is increased and the forgeability (for example, header machinability) in warm or cold is reduced, the life of the die is shortened, and the corrosion resistance is deteriorated. .90% or less,
It is more preferably 0.65% or less, still more preferably 0.
It is set to 50% or less.

Further, Cr is an element effective for improving the corrosion resistance, and for that purpose, it is supposed that the content of Cr is 9.0% or more, more preferably 9.4% or more. However, when the Cr content increases, the specific gravity increases. Is lower than 11.0%, more preferably 10.9% because the weight becomes lower than the standard value when the standard diameter of a pachinko ball is satisfied.
% Or less.

Since B, Ca and Al are effective elements for improving hot workability and header workability, B is 0.001% or more and Ca is 0.1% or more as necessary.
001% or more and Al may be contained in 0.005% or more, but addition of more than necessary may not be preferable in some cases, so B is 0.010% or less and Ca is 0.01% or less.
0% or less and Al is preferably 0.030% or less.

Furthermore, if the Si content is high, the header workability is deteriorated, so 0.80% or less, more preferably 1.15% or less is preferable, and if the Mn content is high, the header workability is deteriorated. Therefore, the content is preferably 1.50% or less, and more preferably 0.35% or less, and if the P content is high, the toughness decreases, so 0.030%.
% Or less, more preferably 0.025% or less, and if the S content is high, the corrosion resistance and toughness are reduced, so 0.030% or less, more preferably 0.015% or less, If the Ni content is high, the header workability is reduced and the toughness is affected.
It is preferably 0% or less, more preferably 0.70% or less, and if the N content is large, the toughness deteriorates, so 0.0
The content is preferably 60% or less, more preferably 0.030% or less, and if the O content is large, the corrosion resistance is deteriorated, so it is preferably 0.010% or less, more preferably 0.005% or less.

The play steel ball of the second embodiment according to the present invention has a weight percentage of C:
0.10 to 0.90%, more preferably 0.35 to 0.
70%, more preferably 0.50 to 0.55%, C
r: 9.0 to 11.0%, more preferably 9.4 to 1
0.9%, Mo: 1.00% or less, more preferably 0.
35 to 0.45%, and the balance Fe and impurities, and in some cases, as described in claim 5, B: 0.001 to 0.010%,
Ca: 0.001-0.010%, Al: 0.005-
One or two or more of 0.030% are included, and in some cases, as described in claim 6, Si: 0.20% or less, more preferably 0.15% or less. %, Mn: 0.15% or less, more preferably 0.10% or less, P: 0.030% or less, more preferably 0.025% or less, S: 0.030% or less, more preferably 0. 015% or less, Ni: 1.00% or less,
More preferably 0.70% or less, N: 0.060% or less, more preferably 0.030% or less, O: 0.010.
% Or less, and more preferably 0.005% or less.

In the play steel ball of the second embodiment, C
Is 0.10% or more, more preferably 0.35% or more, still more preferably 0.50% or more so that the required hardness can be obtained after quenching and tempering. If the content is too large, the amount of carbides is increased, the header workability in warm or cold is deteriorated, the life of the mold is shortened, and the corrosion resistance is deteriorated. Is 0.70
% Or less, and more preferably 0.55% or less.

Further, Cr is an element effective for improving the corrosion resistance, and for that purpose, it is supposed to be contained by 9.0% or more, more preferably 9.4% or more. However, when the Cr content increases, the specific gravity increases. Is lower than 11.0%, more preferably 10.9% because the weight becomes lower than the standard value when the standard diameter of a pachinko ball is satisfied.
% Or less.

Further, since Mo is effective in improving the corrosion resistance, Mo may be added in the range of 1.00% or less.
More desirably, it may be added in the range of 0.35 to 0.45%.

Since B, Ca and Al are effective elements for improving hot workability and header workability, B is 0.001% or more and Ca is 0.1% or more as necessary.
001% or more and Al may be contained in 0.005% or more, but addition of more than necessary may not be preferable in some cases, so B is 0.010% or less and Ca is 0.01% or less.
0% or less and Al is preferably 0.030% or less.

Further, if the Si content is high, the header workability is deteriorated. Therefore, the content is preferably 0.20% or less, more preferably 0.15% or less, and the high Mn content deteriorates the header workability. Therefore, the content is preferably 0.15% or less, more preferably 0.10% or less, and if the P content is large, the toughness decreases, so 0.030%.
% Or less, more preferably 0.025% or less, and if the S content is high, the corrosion resistance and toughness decrease, so 0.030% or less, more preferably 0.015% or less, If the Ni content is high, the header workability is reduced and the toughness is affected.
It is preferably 0% or less, more preferably 0.70% or less, and if the N content is large, the toughness deteriorates, so 0.0
The content is preferably 60% or less, more preferably 0.030% or less, and if the O content is large, the corrosion resistance is deteriorated, so it is preferably 0.010% or less, more preferably 0.005% or less.

The play steel ball of the third embodiment according to the present invention has a weight percentage of C:
0.10-0.90%, more preferably 0.10-0.
60%, more preferably 0.10 to 0.40%, further preferably 0.10 to 0.20%, Cr: 15.0 to
17.0%, more preferably 15.0 to 16.0%, N
i: 1.0 to 3.0%, more preferably 1.25 to 2.
50%, more preferably 1.25 to less than 2.00%,
More preferably, it is characterized by containing 1.30 to 1.90% and the balance being Fe and impurities. In some cases, as described in claim 7, Si: 1.
00% or less, more preferably 0.50% or less, Mn:
1.00% or less, more preferably 0.50% or less, P:
0.030% or less, more preferably 0.025% or less,
S: 0.030% or less, more preferably 0.015% or less, N: 0.060% or less, more preferably 0.030
% Or less, O: 0.010% or less, more preferably 0.0
The feature is that it is set to 05% or less.

In the play steel ball of the third embodiment, C
Is added in an amount of 0.10% or more so that the required hardness can be obtained after quenching and tempering.
If the content is too large, the amount of carbide generated increases, the header workability is reduced, the mold life is shortened, and the corrosion resistance is deteriorated. Therefore, 0.90% or less, more preferably 0.60% Or less, more preferably 0.40
% Or less, and more preferably 0.20% or less.

Further, Cr is an element effective for improving the corrosion resistance, and for that purpose, it is supposed to be contained by 15.0% or more. However, when the Cr content increases, the specific gravity decreases, and for example, for pachinko balls. Since the weight becomes lower than the reference value when the reference diameter is satisfied, the content is set to 17.0% or less, and more preferably 16.0% or less.

Further, Ni is 1.0% or more so as to improve the corrosion resistance and compensate for the decrease in the specific gravity caused by further increasing the Cr content as described above so as to satisfy the reference diameter and the reference weight. , More preferably 1.25% or more, and further preferably 1.30% or more, but if it is too much, it exceeds the standard weight and the header workability is deteriorated, so 3.0%. Or less, more preferably 2.50% or less,
It is more preferably less than 2.00%, and even more preferably 1.90% or less.

Further, if the Si content is high, the header workability is deteriorated. Therefore, the content is preferably 1.00% or less, more preferably 0.50% or less, and the high Mn content deteriorates the header workability. So 1.00% or less,
More preferably, it is preferably 0.50% or less,
If the P content is high, the toughness is reduced, so it is 0.030% or less, more desirably 0.025% or less, and if the S content is high, the corrosion resistance and the toughness are reduced, so 0.030% or less, More preferably, it is 0.015% or less, and if the N content is large, the toughness deteriorates, so it is 0.060% or less, more preferably 0.030%.
It is preferable that the content be 0.010% or less, more preferably 0.0 because the corrosion resistance deteriorates if the O content is large.
It is preferably set to not more than 05%.

Then, in the play steel balls according to the first to third embodiments, as described in claim 9, the surface is hardened and tempered, then scaled polishing → lapping → barrel polishing etc. Alternatively, as described in claim 10, it may have a colored skin formed by a metal, cermet or ceramic coating vapor deposition film.

A method for manufacturing a play steel ball according to the present invention uses, as described in claim 11, a steel wire material having the component composition according to any one of claims 1 to 7, for example, 800 ° C. Annealing treatment is performed before and after to reduce the hardness, and then a phosphoric acid film treatment is applied to provide lubricity to the surface, and the steel wire material is drawn to obtain a required diameter (for example, 7.0 to 8). It is a steel wire rod for forging.

Next, after the steel wire rod for forging is cut, it is subjected to cold or warm forging (for example, warm or cold header processing) to obtain a spherical shape, and burrs are formed when necessary. Perform rounding, grinding, and polishing to improve roundness, and if necessary, make appropriate markings, then heat-treat, quenching and tempering, then scale-polishing → lapping → barrel polishing And finish the surface with gloss.

In some cases, as described in claim 12, a physical vapor deposition method (PV
D, ion plating, sputtering, etc., metal, cermet or ceramics vapor deposition can be applied to form a colored skin with a ceramic coating vapor deposition film. For example, titanium vapor deposition coating allows titanium-colored (silver gray) steel balls. , Aluminum gray, silicon nitride, tungsten boride, tungsten carbide, etc. vapor-deposited to form gray steel balls, zirconium nitride vapor-deposited to brass or gold steel balls, titanium nitride vapor-deposited to bronze steel balls. Spheres, vapor-deposited chromium boride into silver-white or silver-colored steel balls, vapor-deposited vanadium carbide, boron carbide, tantalum nitride, etc. into black steel balls, vapor-deposited molybdenum carbide into white steel balls Appropriate metal, cermet or ceramic coating vapor By contact forming a film, various colors, it is possible to play steel balls having a color tone.

[0031]

EXAMPLES Example 1 No. 1 in Table 1 Using the steel wire material having the composition shown in 1-5, after annealing at 800 ℃ to reduce the hardness,
The surface of the steel wire was treated with a phosphoric acid film to provide lubricity, and this steel wire material was drawn to obtain a steel wire material for header processing having a diameter of 7.5 mm.

Next, after the steel wire rod for header processing is cut, it is subjected to cold header processing to obtain a spherical shape, deburring is performed by a grinder and grinding processing is performed to improve the roundness, and further engraved. After that, heating at 1050 ° C., quenching by cooling in an N ₂ atmosphere and 150
After heat treatment at ℃, tempering treatment by air cooling, and further scale removal polishing → lapping → barrel polishing, platingless play steel balls having a glossy surface skin were obtained.

In the process of manufacturing such a play steel ball, the evaluation of the header workability and grindability of the steel wire rod was compared with that of the conventional carbon steel wire rod for cold heading (No. 6). The surface texture, surface hardness, weight, diameter, and corrosion resistance (by a wet test using salt water) of each of the play steel balls obtained here were evaluated. 1
The results are shown in Table 1.

For comparison, No. 1 in Table 1 is used. The carbon steel material for cold heading shown in 6 was used to make a spherical shape by cold header processing, and deburring was performed by a grinder and grinding was performed to increase the roundness and marking was made.
Carburizing and quenching at 0 ° C. and tempering at 150 ° C. were performed, and scale removal polishing → lapping → Cr plating → barrel polishing was performed to obtain a conventional Cr-plated amusement steel ball.

Then, the surface texture, surface hardness, weight, diameter and corrosion resistance (the same as above) of the obtained play steel balls were evaluated. The results are shown in 6.

[0036]

[Table 1]

[0037]

[Table 2]

As is clear from the results shown in Tables 1 and 2, in the examples of the present invention, the header processability and the grindability were good, the surface gloss was sufficient, and the surface skin was polished. It can be made sufficiently good, has sufficient surface hardness and excellent wear resistance, meets the specifications of weight and diameter, and has considerably good corrosion resistance,
It was recognized that it is sufficiently applicable as a pachinko ball.

Example 2 A steel wire material having the composition shown in Table 3 was used at 800 ° C.
After annealing to reduce the hardness, phosphoric acid film treatment is applied to lubricate the surface, and this steel wire material is drawn to obtain a steel wire material for header processing with a diameter of 7.5 mm. .

Next, after this steel wire rod for header processing is cut, cold header processing is performed to obtain a spherical shape, deburring is performed by a grinder and grinding processing is performed to increase the roundness, and further marking is applied. After that, heating at 1050 ° C., quenching by cooling in an N ₂ atmosphere and 150
After heat treatment at ℃, tempering treatment by air cooling, and further scale removal polishing → lapping → barrel polishing, platingless play steel balls having a glossy surface skin were obtained.

In the process of manufacturing such a play steel ball, header workability and grindability were compared with those of a conventional carbon steel wire rod for cold heading (No. 16 (6)). The surface texture, surface hardness, weight, diameter, and corrosion resistance (by a wet test using salt water) of each of the play steel balls obtained here were evaluated, and the results are shown in Table 4.

Nos. Shown in Tables 3 and 4 are used. No. 16 shown in Tables 1 and 2. 6 is the same as the conventional example.

[0043]

[Table 3]

[0044]

[Table 4]

As is clear from the results shown in Tables 3 and 4, in the examples of the present invention, the workability of the header was excellent, the grindability was good, the surface gloss was sufficient, and the surface skin was polished. It can be made sufficiently good, has sufficient surface hardness and excellent wear resistance, meets the specifications of weight and diameter, and has considerably good corrosion resistance,
It was recognized that it is sufficiently applicable as a pachinko ball.

Example 3 A steel wire material having the composition shown in Table 5 was used at 800 ° C.
After annealing to reduce the hardness, phosphoric acid film treatment is applied to lubricate the surface, and this steel wire material is drawn to obtain a steel wire material for header processing with a diameter of 7.5 mm. .

Next, the steel wire rod for header processing is cut, and then cold header processing is performed to obtain a spherical shape, and deburring is performed by a grinder and grinding processing is performed to increase the roundness and further engraved. After that, heating at 1050 ° C., quenching by cooling in an N ₂ atmosphere and 150
After heat treatment at ℃, tempering treatment by air cooling, and further scale removal polishing → lapping → barrel polishing, platingless play steel balls having a glossy surface skin were obtained.

In the process of manufacturing such a play steel ball, the header workability and grindability were compared with those of the conventional carbon steel wire rod for cold heading (No. 26 (6)). The surface texture, surface hardness, weight, diameter and corrosion resistance (by a wet test using salt water) of each of the play steel balls obtained here were evaluated, and the results are shown in Table 6.

Nos. Shown in Tables 5 and 6 were used. No. 26 is No. 26 shown in Tables 1 and 2. 6 is the same as the conventional example.

[0050]

[Table 5]

[0051]

[Table 6]

As is clear from the results shown in Tables 5 and 6, in the examples of the present invention, the header processability and grindability were good, the surface gloss was sufficient, and the surface skin was sufficiently good by polishing. It was found that the surface hardness is sufficient, the abrasion resistance is excellent, the weight and the diameter meet the specifications, and the corrosion resistance is quite good, so that it is sufficiently applicable as a pachinko ball.

[0053]

As described above, the play steel ball according to the present invention has the chemical composition as set forth in any one of claims 1 to 8. Unlike those plated with Cr, good corrosion resistance can be obtained without Cr plating. Therefore, the need for plating treatment equipment due to Cr plating, the effect on environmental pollution, and plating stripping It is possible to solve problems such as damage to amusement equipment, ball sales equipment, ball transfer equipment, etc. due to this, discomfort due to rust preventive oil adhesion to prevent rusting, and reduce the amount of steel balls to be disposed of. It is possible to obtain a remarkably excellent effect.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical indication C22C 38/54 C22C 38/54

Claims (12)

[Claims] 1. C: 0.10 to 0.90% by weight,
A play steel ball containing Cr: 9.0 to 11.0% and the balance Fe and impurities. 2. B: 0.001 to 0.010%, Ca:
0.001-0.010%, Al: 0.005-0.0
The play steel ball according to claim 1, comprising one or more of 30%. 3. Si: 0.80% or less, Mn: 1.50%
Hereinafter, P: 0.030% or less, S: 0.030% or less,
Ni: 1.00% or less, N: 0.060% or less, O:
The play steel ball according to claim 1 or 2, wherein the content is 0.010% or less. 4. C: 0.10 to 0.90% by weight,
A play steel ball comprising Cr: 9.0 to 11.0% and Mo: 1.00% or less, and the balance being Fe and impurities. 5. B: 0.001 to 0.010%, Ca:
0.001-0.010%, Al: 0.005-0.0
The play steel ball according to claim 4, wherein one or more of 30% is included. 6. Si: 0.20% or less, Mn: 0.15%
Hereinafter, P: 0.030% or less, S: 0.030% or less,
Ni: 1.00% or less, N: 0.060% or less, O:
The play steel ball according to claim 4 or 5, wherein the content is 0.010% or less. 7. C: 0.10 to 0.90% by weight,
Cr: 15.0 to 17.0%, Ni: 1.0 to 3.0
%, With the balance being Fe and impurities. 8. Si: 1.00% or less, Mn: 1.00%
Hereinafter, P: 0.030% or less, S: 0.030% or less,
The play steel ball according to claim 7, wherein N: 0.060% or less and O: 0.010% or less. 9. The play steel ball according to claim 1, wherein the surface has a polished surface. 10. The play steel ball according to claim 1, wherein the surface is a colored skin having a metal, cermet or ceramic coating vapor deposition film. 11. A steel material having a composition according to any one of claims 1 to 8 is drawn into a steel wire rod having a required diameter, and the steel wire rod is cut into a required length and then cold or warm. The method for producing amusement steel balls is characterized in that the forging process is performed into a spherical shape, the necessary markings are made, quenching / tempering treatment is applied, and the surface is polished to a glossy finish. 12. The method for producing a play steel ball according to claim 11, wherein after the gloss finish, a metal, cermet or ceramics vapor deposition is applied to form a colored skin by the metal, cermet or ceramics coating vapor deposition film. .