JPH0513678B2 - - Google Patents

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 and knives.

[Conventional technology]

Disturbed patterns and Damascus steel seen on the blade of ancient Japanese swords (Gassan style swords)
The damask patterns found on Damask swords are loved by custom knife makers and enthusiasts, and household knives and scissors with patterns imitating these patterns are also popular as high-quality cutlery with excellent aesthetic effects. be.

However, since these damask patterns are created by combining hard and soft ferrous metals, the joint boundary cannot be processed by 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 boundaries of the pattern become unclear, this type of decorative cutlery also uses metal materials that exhibit the same color luster. In that state, the contrast of the pattern is not clear and it only looks vague, so it is necessary to make the pattern stand out by shot peening or corrosive treatment with acid, which reduces production efficiency and production cost. There was a need for improvement.

[Problems 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 allows for efficient matching.

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 shot peening, corrosion treatment, etc. are not required. It is an object of the present invention to provide a cosmetic cutlery that can be manufactured without any hassle, and a method for manufacturing a material suitable for making such a cosmetic cutlery.

[Means for explaining the problem]

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 localized mild steel or low carbon stainless steel and non-ferrous metal materials such as copper or copper alloys or nickel or nickel alloys, and A clad base material layer arranged and laminated in multiple layers so as to have a large mutual color contrast difference; and a high-arbon 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 a color arrangement and a diffusion prevention effect, the cutter steel layer can be hardened, tempered, etc. on the cutting edge formed through the cutting process. Heat treated to increase hardness
H _RC Even when cured to a temperature of 54° or higher, no diffusion phenomenon occurs between the bonding layers, and a clear colored pattern with rich contrast is revealed on the surface of the clad base material layer, resulting in a beautiful appearance that does not require any shot peening or corrosion treatment. This led to the creation of a knife.

Therefore, in the cutlery of the present invention constructed by adopting the above means, the iron-based metal part has a unique deep grayish color, the copper part has a reddish color, and the copper alloy has a golden or cloudy color. In addition, while nickel exhibits whiteness, the edges are lined up in a ripple pattern with outstanding contrast without any turbidity, creating a colorful and gorgeous pattern that cannot be seen on conventional Damascus cutlery, giving it a high commercial value. It is possible to create.

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

That is, 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 to be the cutting edge is arranged on the non-ferrous metal material surface of this clad slab, and these are arranged alternately. If a method is adopted in which the ferrous metal material and the non-ferrous metal material mutually function as a diffusion prevention layer, they are rolled at a temperature of 800 to 950°C to reduce the overall thickness by 50% or more.
The various metal materials arranged and laminated as described above are metallurgically layered and integrated, and by undergoing the grinding, polishing, and forging processes associated with the cutting process, a vivid and gorgeous multicolored pattern is revealed. Even after heat treatment such as quenching and tempering, the metal layers prevent each other from diffusing, and no turbidity occurs at the layer boundaries, making it possible to obtain a cutlery with a distinctive multicolored pattern.

〔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, FIG. 2 is a sectional view taken along line A-A of the same example, and FIGS.
The figure is a perspective view explanatory diagram showing step by step the process of manufacturing the material for producing the example product.
The figure is a perspective view of a blade base obtained by cutting out the material shown in Figure 5, and Figure 7 is a front view of an example product made into a grip handle knife by applying cutting and heat treatment to the same blade base. be.

In FIGS. 1 and 2, the portion designated by the reference numeral 11 is the clad base material layer, which includes low carbon stainless steel 30, copper 31, and low carbon stainless steel 3.
0, copper alloy 32, low carbon stainless steel 30, nickel 33, low carbon stainless steel 30, and copper 3
1... ferrous metal materials and non-ferrous metal materials are alternately laminated, and the difference in color contrast between the metal materials forming adjacent layers is relatively large.

Further, a portion indicated by the reference numeral 12 is a high carbon cutter steel layer, and the clad base material layer 11,
It is metallurgically joined to the non-ferrous metal layer 11, and forms a cutting edge 21 along the edge of the edged part, and has been heat treated by quenching and tempering to have a hardness that ensures the sharpness of the blade. Hardened to H _RC 54° or higher.

The product of this example (knife) shown in Figures 1 and 2 has the above-mentioned material arrangement, so it can withstand non-ferrous metals even during steps in clad processing and thermal history such as quenching and tempering. The ferrous metal material acts as a diffusion prevention layer for ferrous metals, and the ferrous metal material acts as a diffusion prevention layer for non-ferrous metals, so the layer boundaries do not become cloudy and the multicolored color is outstanding. It has a pattern and exudes luxury.

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 Fig. 3, low carbon stainless steel 30, copper 31, low carbon stainless steel 30, copper alloy 31, low carbon stainless steel 30, nickel 33,
Laminated clad slabs 41, 41 are produced by alternately stacking low carbon stainless steel 30, copper 31, etc. so that the difference in color contrast between adjacent ferrous metal materials and non-ferrous metal materials is large. At the same time, a nonferrous metal is placed on the outer surface of the laminated clad slabs 41, 41, and a high carbon cutter steel 42 for forming a cutting edge is placed between the nonferrous metals. In this case, the bonding surfaces of each of the metal materials are cleaned by polishing, buffing, etc., and a clad slab 50 is assembled in which each bonding surface is sealed from the outside air using a cover iron method or the like (see FIG. 4).

Next, the above clad slab was hot rolled at a temperature of 800 to 950°C to a total reduction rate (the following formula) [total reduction rate = total thickness - finished thickness / total thickness x 100] of 50% or more. For example, a decorative cutlery (cladding) material 60 as shown in FIG. 5 can be obtained.

The material 60 thus obtained can be die-cut, forged,
By performing well-known processing such as rough grinding, heat treatment, finish grinding, and handle attachment, the knife 80 is made into a gorgeous decorative knife 80 that exhibits a gorgeous ripple pattern with vivid colors and outstanding contrast.

Therefore, in the above process, the clad slap 50 in which ferrous metals and non-ferrous metals are alternately layered is used because non-ferrous metals are layered next to each other, such as copper and copper alloy, or copper and nickel. This is because at the bonding interface, the diffusion layer takes on the color of a new copper alloy layer, making the pattern boundary unclear. By interposing a ferrous metal between these nonferrous metals, This is because the diffusion of metals is prevented and a clear pattern can be obtained, and 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℃.
Considering the difficulty of joining materials such as ferrous metals and non-ferrous metals, which have significantly different deformation resistance values, especially in hot conditions, by the rolling method, as a result of various deliberations, 800
Below ℃ or above 950℃, the hot deformation resistance values of ferrous metals and non-ferrous metals differ greatly, especially
If the temperature is 950℃ or higher, the temperature is close to the temperature at which the copper alloy melts, so there is a risk that the molten material will scatter, making the work extremely dangerous. This is because it was found that it was difficult to bond the product, and even if it were bonded, the product yield would be greatly reduced.

Next, the reason why the total rolling reduction rate was set to 50% or more was that
The hot rolling temperature for ferrous metals is 1100 to 1150°C, whereas rolling is performed at a lower temperature of 800 to 950°C.
This is because it has been confirmed through experiments that it is necessary to apply a total rolling reduction of 50% or more.

In addition, when selecting the material for the part that composes the clad base material layer 11 in this example product (knife), that is, the laminated clad slab 41, for example, extremely mild steel (SAE-1006), low carbon stainless steel, etc. JIS (SUS 410),
Alternatively, JIS (SUS 430), copper (JIS C 1220), copper alloy (JIS C 2600), etc. can be used, but they should be selected and arranged as appropriate depending on the purpose and conditions of the cutlery. Yes, and again there is no particular intention to limit it.

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, the non-ferrous metal layers It is preferable to provide at least five layers or more. However, it is natural that the number of layers may be increased or decreased depending on the shape, size, etc. of the cutlery, and there is no intention to limit it in particular.

Furthermore, when producing the material 60 for decorative cutlery (cladding), the final finished dimensions of the material 60 and the structural issues of whether it will be used for single-edged or double-edged use will depend on specific needs. In addition, even if the laminated clad slab 41 and the high carbon cutter steel 42 are assembled together into the laminated clad slab 50, there may be a difference in the number of layers or layer thickness of the laminated clad slab 41. In some cases, processing such as rolling may be difficult, so a laminated clad slab 41 of an appropriate size and thickness is hot-rolled and clad in advance, and then this laminated base steel member and blade member are stacked. A material for decorative cutlery (cladding) is produced by repeating the complicated hot rolling process.6
Of course, it is also possible to obtain 0.

Cosmetic cutlery cladding material 60 produced as above
The cutter base material 70 is cut out from a die, and then it is finished into a cutlery through processes such as rough polishing, heat treatment, polishing, and handle attachment. It becomes a pattern,
If the cutter base material 70 is subjected to a partial cutting process or a hammering forging process, and then subjected to rough polishing, heat treatment, and polishing to create a handle, the pattern that appears on the blade will be a ripple pattern. Cutlery 8 with a more aesthetic effect
0 can be obtained.

[Manufacturing example]

Low carbon stainless steel plate (JIS SUS 410) 1.5×150×200m/
m ~ 18 sheets, copper plate (JIS C 1220) 0.5 x 150 x 200
m/m~6 pieces, golden copper alloy plate ((JIS C 2600)
0.5×150×200m/m ~ 6 pieces, nickel board 0.5×
150 x 200 ~ 4 pieces, as a cutting edge steel material,
High carbon stainless steel cutlery steel (main component C%0.7~
0.8Cr% 13~14, product of Takefu Special Steel Co., Ltd.: V Gold No. 5) 13 x 170 x 220 ~ 1 sheet was prepared, each joint surface was polished, cleaned with a buff, and covered with iron method. A sealed multi-layer clad slab was obtained.

Next, after heating and holding at 850-900℃ in a heating furnace,
Rolled (total reduction rate 91.7%) to 4×150×
A cladding material for decorative cutlery with a diameter of 2000 m/m was obtained.

The thus-obtained clad material was subjected to conventional manufacturing processes (processes such as die cutting, forging, rough polishing, heat treatment, finishing polishing, and handle attachment) to obtain a cutlery, but there were no red, gold, white, or metal parts on the blade. A variety of lustrous lustrous patterns were revealed, and no post-processing such as shot punning 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 grayish color, the bar part has a reddish color, the copper alloy has a golden color or a cloudy white color, and the nickel has a white color. The edges are lined up in a ripple 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 produce a cladding material for decorative cutlery, which is a combination of multi-laminated materials of ferrous metals and non-ferrous metals, with good yield. The material obtained by the method of integrally bonding the material is polished into a brilliant multicolored pattern through grinding, polishing, and forging processes associated with the blade processing, and is hardened and polished. Even after heat treatment such as tempering, the metal layers prevent each other from diffusing and the overall boundary does not become cloudy, making it possible to effectively produce cutlery with distinctive multicolored patterns.

[Brief explanation of the drawing]

Fig. 1 is a front view of a knife which is an example of the present invention, Fig. 2 is a sectional view taken along line A-A of the same example, and Figs. A perspective view explanatory diagram showing the process of manufacturing the material step by step. Figure 6 is a perspective view of a cutter base obtained by cutting the material in Figure 5, and Figure 7 is a cutter base with a blade. FIG. 2 is a front view of an example product that has been heat-treated and made into a handle knife.

Claims (1)

[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 arranged alternately and adjacently. A clad base material layer 11 that is arranged and laminated in multiple layers so that the difference in color tone between the metal materials is large; and a cutter that is metallurgically bonded to the layer formed by the non-ferrous metal material in this base material layer 11. a steel layer 12;
This cutter steel layer 12 is formed into a cutting edge 21 through a cutting process and is hardened to a hardness of H _RC 54° or more through heat treatment such as quenching and tempering, and the clad base material layer 11 is Beautiful cutlery characterized by the sharp, contrast-rich colored patterns that appear on the surface that has been removed by the cutting process. 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, 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 to be the cutting edge is placed on the non-ferrous metal material surface of this clad slab, and these are arranged alternately. The ferrous metal material and non-ferrous metal material are rolled at a temperature of 800 to 950°C while functioning as a diffusion prevention layer to reduce the overall thickness.
A method for producing materials for cosmetic cutlery, which is characterized by reducing the pressure by 50% or more and metallurgically joining and integrating the materials.