JPH01270889A - Finely dressed knife having sharp chromatic pattern and production of material used for said knife - Google Patents

Abstract

PURPOSE:To eliminate the need for a corrosion preventive treatment, etc., by adopting metallic-material arranging means which ingeniously combine color arrangement and diffusion preventive effects with clad base material layers consisting of ferrous metallic materials and nonferrous metallic materials. CONSTITUTION:The clad base material layers 11 are alternately laminated with the ferrous metallic materials and nonferrous metallic materials like, for example, a low- carbon stainless steel 30, copper 31, low-carbon stainless steel 30, copper alloy 32, low-carbon stainless steel 30, nickel 33, low-carbon stainless steel 30, and copper 31... and are so arranged with these materials that the differences in the color tone contrasts between the metallic materials forming the adjacent layers are relatively large. The knife steel layer 12 is metallurgically joined to the nonferrous metallic layers of the clad base material layers 11, 11 to form a cutting edge 21 and is subjected to a history of heat treatments by hardening and tempering and is thereby hardened to >=54 deg. hardness at which the cutting quality is to be assured. The nonferrous metallic materials act as the diffusion preventive layers to the ferrous metals and the ferrous metallic materials act as the diffusion preventive layers to the nonferrous metallic materials. As a result, the knife having the exceptionally many chromatic patterns is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a decorative knife having a clear colored pattern on its surface, and a method for manufacturing a knife material used to make such a knife. It can be used in the cutlery industry such as scissors, knives, etc.

(Prior art) The disordered pattern seen on the blade of an ancient Japanese sword (Gassan style sword) and the Damascus pattern seen on the Damascus sword using 5teeυ.
sk) is used by custom knife makers and enthusiasts,
Household knives and scissors with patterns similar to these are also popular as high-quality cutlery with excellent aesthetic effects.

However, since these Damask patterns are created by combining hard and soft ferrous metals, the joint boundary may be damaged during rolling forge welding or heat treatment such as quenching and tempering. In addition to the disadvantage that a diffusion phenomenon occurs due to the history of processing heat and the pattern boundaries become unclear, this type of decorative cutlery uses metal materials with the same color luster. In the - condition, the contrast of the pattern is not clear and it only looks indistinct, so it is necessary to make the pattern stand out by peening or corrosive treatment with acid.There is a need for improvement in terms of production efficiency and production cost. There was.

[Technical issues to be solved]

The present invention solves the above-mentioned problems with conventional cosmetic cutlery, and goes one step further to create a new type of cosmetic cutlery that is bright and rich in color, and a material suitable for making such cosmetic cutlery. The technical problem is to provide a method that can efficiently manufacture .

Another technical problem of the present invention is that no diffusion phenomenon occurs even with the processing heat that inevitably occurs during the cutting tool manufacturing process, and there is no need for sit peening or corrosion treatment. (An object of the present invention is to provide a method for manufacturing cosmetic cutlery that can be manufactured and materials suitable for manufacturing such cosmetic cutlery.

[Means for solving problems]

The means adopted by the present inventor to solve the above technical problem are as follows.

That is, the present invention alternately uses ferrous metal materials such as extremely mild steel or low carbon stainless steel and non-ferrous metal materials such as copper or copper alloys or nickel or nickel alloys, and also alternates the adjacent metal materials with each other. a kraft base material layer arranged and laminated in multiple layers so as to have a large color contrast difference; and a high carbon cutter steel layer metallurgically bonded to the layer formed by the non-ferrous metal material in this base material layer. By adopting a method of arranging metal materials that skillfully combines color arrangement and diffusion prevention effect, the cutter steel layer is formed by applying heat treatment such as quenching and tempering to the cutting edge formed through the cutting process. Even if the material is hardened to a hardness of H054° or higher, no diffusion phenomenon occurs between the bonding layers, and a clear colored pattern rich in contrast appears on the surface of the clad base material layer, making it unnecessary to perform any sit peening or corrosion treatment. We have created a beautiful decorative knife that has never existed before.

Therefore, the cutlery of the present invention constructed by adopting the above-mentioned means has a unique deep grayish black luster on the iron-based metal part.
The body part has a red color, the copper alloy has a gold color or a cloudy white color, and the nickel has a white color. Unexpectedly colorful and gorgeous patterns emerge, creating high commercial value.

Next, the materials used for manufacturing the above-mentioned decorative cutlery can be manufactured by the following methods.

In other words, when laminating ferrous metal materials such as extremely mild steel or low carbon stainless steel and non-ferrous metal materials such as copper or copper alloys or nickel or nickel alloys, it is necessary to The two metals are arranged next to each other to create a laminated clad slab so that the difference in color contrast is large, and the cutter steel material that is to become the cutting edge is placed on the non-ferrous metal material surface of this clad slab, and these are alternately arranged. While making the ferrous metal material and non-ferrous metal material that are placed mutually function as a diffusion prevention layer,
This was rolled at a temperature of 800 to 950℃ to a total thickness of 50℃.
If a method of reducing the pressure by more than 10% is adopted, the various metal materials arranged and laminated as described above will be metallurgically integrated into layers, and will become brightly colored by going through the grinding, polishing, and forging processes associated with the cutting process. A dazzling multicolored pattern is revealed, and even after heat treatment such as quenching and tempering, each metal layer prevents mutual diffusion and no turbidity occurs at the layer boundaries, resulting in a knife with a distinctive multicolored pattern. can be obtained.

〔Example〕

Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings. In addition, FIG. 1 is a front view of a knife which is an example of the present invention, and FIG. 2 is a view taken along A-A of the same example.
Line sectional views, Figures 3 to 5 are perspective explanatory views showing step-by-step the process of manufacturing the material for producing the example products, and Figure 6 is a diagram showing the material shown in Figure 5 cut out from a die. FIG. 7 is a perspective view of the obtained blade base, and a front view of an example product obtained by subjecting the same blade base to cutting processing and heat treatment to produce a knife with a carved handle.

In FIGS. 1 and 2, the portion indicated by the reference numeral 11 is a clad base material layer, which is made of low carbon stainless steel 30.
1M31, low carbon stainless steel style 30. Copper alloy 32, low carbon stainless steel 30, nickel 33, low carbon stainless steel 30, and W431... ferrous metal materials and non-ferrous metal materials are alternately laminated and form adjacent layers. The differences in color contrast between the metal materials are relatively large.

Further, the part indicated by the reference numeral 12 is a high carbon cutter steel layer, which is metallurgically joined to the nonferrous metal layer of the clad base material layers 11 and 11, and is cut along the edge of the cutter part. In addition to forming the blade 21, the hardness is HRC54, which has undergone heat treatment by quenching and tempering to ensure sharpness as a knife.
It is hardened to more than °.

The product of this example (knife) shown in FIGS. 1 and 2 has the above-mentioned material arrangement, so even during the clad processing stage and thermal history such as quenching and tempering, Non-ferrous metal materials act as a diffusion prevention layer for ferrous metals,
In addition, since the ferrous metal material acts as a diffusion prevention layer for the non-ferrous metal material, the layer boundaries do not become cloudy, and the material exhibits a distinctive multicolored pattern, giving it a luxurious feel.

Next, an example of a method for manufacturing a metal material that is advantageous for manufacturing the cosmetic knife that is the example product described above will be described.

First, as shown in Figure 3, low carbon stainless steel 30, t
Color contrast between adjacent ferrous metal materials and non-ferrous metal materials such as R31, low carbon stainless steel 30, copper alloy 31, low carbon stainless steel 30, nickel 33, low carbon stainless steel 30, copper 31... Laminated clad slabs 41, 41 stacked alternately so that the difference in
At the same time, this laminated craft slab 41.4
A non-ferrous metal is placed on the outer surface of the metal 1, and a cutter steel 42 for forming a cutting edge is placed between the non-ferrous metal.

In this case, the bonding surfaces of each of the metal materials are cleaned by polishing, puffing, etc., and a sealed clad slab 50 is assembled in which each bonding surface is isolated from the outside air using a cover made of iron or the like (see FIG. 4).

Then, if the above-mentioned clad slab is hot-rolled at a temperature of 800 to 950°C to a total rolling reduction rate (% formula %) of 502 or more, the clad slab for decorative cutlery as shown in FIG. ) material 60 is obtained.

The thus obtained material 60 was subjected to well-known processing processes such as die cutting, forging, rough grinding, heat treatment, finishing grinding, and patterning to give it a gorgeous ripple-like pattern with a group of colors of outstanding contrast. It becomes 80 train-style cosmetic knives (knives).

Therefore, in the above process, the clad slab 50 in which ferrous metals and non-ferrous metals are alternately layered is used because non-ferrous metals such as copper and copper alloy or copper and nickel are placed next to each other. This is because the diffusion layer takes on the color of a new copper alloy layer at the bonding interface, making the pattern boundary unclear. By interposing a ferrous metal between these nonferrous metals, Metal diffusion is prevented and clear patterns can be obtained.
At the same time, the diffusion phenomenon between ferrous metals can be blocked by the presence of non-ferrous metals.

In addition, the rolling temperature was limited to 800 to 950°C, in view of the difficulty of joining ferrous metals and non-ferrous metals, which have significantly different deformation resistance values especially in hot conditions, by rolling. As a result of a mistake, the temperature was below 800℃ or 95℃.
At temperatures above 0°C, the hot deformation resistance values of ferrous metals and non-ferrous metals differ greatly, and especially at temperatures above 950°C, the temperature is close to that at which copper alloy melts, so there is a risk that the molten material will scatter. This is because it has been found that metallurgical bonding by rolling is difficult due to the extremely dangerous work involved, and even if bonding were possible, the product yield would be greatly reduced.

Next, the reason why the total rolling reduction ratio is set to 50% or more is because the regular hot rolling temperature for ferrous metals is 1100 to 1150°C, but the rolling temperature is as low as 800 to 950°C. Therefore, it was confirmed through experiments that it is necessary to apply a total rolling reduction of at least 502 or more in order to obtain sufficient adhesive strength.

In addition, the clad base material layer 1 in this example product (knife)
1, that is, the laminated clad slab 41, when selecting materials, for example, i, extremely mild steel (5AE-1006>, ii, low carbon stainless steel JIS (SO341) or JIS (
SUS 430), mountain, copper (JIS C122
0), tv, copper alloy (JIS C2600), etc. may be used, but they may be appropriately selected and arranged depending on the purpose of use of the cutlery, conditions, etc., and there is no particular intention to limit this.

It should be noted that if the number of non-ferrous metal layers in the laminated clad slab 41 is too small, the aesthetic effect cannot be obtained, and according to the inventor's trial experiments, non-ferrous metal layers It is preferable that the number of layers be at least five or more. However, it is natural that the number of layers may be increased or decreased as appropriate depending on the shape, size, etc. of the cutlery, and there is no intention to specifically limit the number of layers.

Furthermore, in the case of manufacturing the material 60 for cosmetic cutlery (cladding), the final finished dimensions of the material 60 and the structural issues of whether to use it for one edge or for both edges may be determined depending on the specific needs. In addition, the laminated clad slab 41 and the cutlery! 1
Even if a large laminated clad slab 50 is assembled together with the laminated clad slabs 142 and 142, processing such as rolling may be difficult depending on the number of layers and the difference in layer thickness of the laminated clad slab 41. A laminated clad slab 41 of an appropriate size and thickness is hot-rolled to form a cladding, and then the laminated base steel member and the blade member are stacked and hot-rolled, repeating multiple steps of hot rolling to create a decorative cutlery. (Clad) material 6
Of course, it is also possible to obtain 0.

The cladding material 60 for cosmetic cutlery produced as described above is cut out into a cutter base material 70, which is then roughly polished.
Once the blade is finished through processes such as heat treatment, finishing polishing, and handle attachment, the pattern that appears on the blade will be a clear vertical striped pattern with distinct colors. After the forging process, rough polishing → heat treatment → finish polishing → handle attachment is applied to finish the knife, and the pattern that appears on the blade becomes a ripple pattern, creating a cutlery 80 with a layered aesthetic effect. It is something that can be done.

[Manufacturing example]

Low carbon stainless steel plate (JIS 5IJS 410) 1.5 X! 50
x200m/m~18 sheets, copper plate CJIS C1220)
0.5 xtso X200m/-~6 pieces, golden copper alloy plate (JIS C2600) 0.5X150X20
0 ml - ~6 sheets, nickel plate 0.5 x 150 x
200 to 4 pieces, high carbon stainless steel cutter steel (main component C% 0.7 to 0.8.C
r Z 13-14, Takefu special steel kidney product name: ■ Total 5
No.) 13 x 170 x 220 ~ 1 sheet was prepared, each joint surface was polished and cleaned with a puff, and a multi-layer clad slab was obtained which was sealed with cover iron.

Next, after heating and holding at 850 to 900°C in a heating furnace,
Rolling process (total rolling reduction rate 91.7 Z) was applied to 4 x 1
A 50×2000 m/m cladding material for cosmetic cutlery was obtained.

The clad material thus obtained is subjected to the conventional manufacturing process (die cutting → scraping, forging → rough polishing → heat treatment → final polishing →
The knife was obtained through the process of attaching the handle, etc.), but the blade was red,
A variety of irregular patterns of gold, white, and metallic luster were revealed, and no post-processing such as sit peening or corrosion treatment was required.

[Effects of the present invention]

As explained above, according to the present invention, the iron-based metal part has a unique deep gray color, the body part has a red color, the copper alloy has a gold color or a cloudy white color, and the nickel has a white color. The edges are lined up in a ripple-like pattern with outstanding contrast without any turbidity, creating a colorful and gorgeous pattern that cannot be expected from conventional Damascus cutlery, making it possible to create cutlery with high commercial value. In addition, it is possible to easily and with high yield produce cladding materials for decorative cutlery, which are made of multi-laminated materials of ferrous metals and non-ferrous metals, a material combination that is difficult to join metallurgically by the rolling method. As mentioned above, the material obtained by metallurgically layering and integrating various metal materials arranged and laminated becomes colorful and gorgeous through the grinding, polishing, and forging processes associated with the cutting process. Barrel multicolored patterns appear, and even after heat treatment such as quenching and tempering, the metal layers prevent each other from diffusing each other, and no turbidity occurs at the layer boundaries, resulting in a knife with a distinctive multicolored pattern. This makes it possible to create the material in a specific manner.

[Brief explanation of the drawing]

Fig. 1 is a front view of a knife which is a separate item for carrying out the present invention;
The figure is an enlarged sectional view taken along the line A-A of the same example product, and Figures 3-
FIG. 5 is a perspective explanatory view showing step-by-step the process of manufacturing the material for producing the above-mentioned separate product; FIG. 6 is a perspective view of a cutter base obtained by cutting the material shown in FIG. 5; FIG. 7 is a front view of a different version of the knife with a grip handle, which is obtained by subjecting the base of the knife to edge processing and heat treatment. Figure 5 Figure 1 113 Figure 84

Claims (2)

[Claims] (1) Ferrous metal materials 1 such as extremely mild steel or low carbon stainless steel and non-ferrous metal materials 2 such as copper or copper alloys or nickel or nickel alloys are alternately used, and the metal materials located next to each other are Clad base material layer 1 arranged and laminated in multiple layers so that the difference in color contrast is large
1; and a cutter steel layer 12 metallurgically joined to the layer formed by the non-ferrous metal material in this base material layer 11, and this cutter steel layer 12 forms a cutting edge 21 through a cutting process. At the same time, it undergoes heat treatment such as quenching and tempering to increase the hardness H_
A decorative cutlery characterized in that it is hardened to R_C54° or more, and the clad base material layer 11 exhibits a clear colored pattern rich in contrast on the surface removed by cutting. (2) When laminating ferrous metal materials such as extremely mild steel or low carbon stainless steel and non-ferrous metal materials such as copper or copper alloys or nickel or nickel alloys, it is necessary to The two metals are arranged side by side to form a laminated clad slab so that the difference in color tone contrast is large, and the cutter steel to be the cutting edge is placed on the non-ferrous metal material surface of this clad slab, and these are alternately arranged. The ferrous metal material and the non-ferrous metal material placed in each other are rolled at a temperature of 800 to 950°C while functioning as a diffusion prevention layer to reduce the overall thickness by 50% or more, and are metallurgically joined together. A method for producing a material for cosmetic cutlery, which is characterized by its ability to be made into a decorative material.