JPS58177238A - Manufacture of edged tool - Google Patents

Abstract

PURPOSE:To obtain light weight or the like of an edged tool, by coating a high hardness and wear resistant material to a base material of the edged tool through the method of flame spraying and forming a not easily damaged edge point end part with a simple process while using the material with excellent corrosion resistance and cutting quality further with high and low melting point as the base material of the edged tool. CONSTITUTION:A very soft steel plate 1 used as the base material of an edged tool is processed with sandblasting, and then alloy powder is flame sprayed to one side of the plate 1 to form a coating layer of WC-Co in 150mum thickness. Then after the plate 1 is cooled to adjust its temperature rise by Ar gas, and then a side is cut throughout from the plate 1 to the layer 2 to grind a surface of the layer 2 and obtain an edged tool 4 having an edge point 3. In this way, cutting quality equal to that of a conventional edged tool consisting of carbon steel has been shown while durability has been understood about two times the conventional one, and the tool can be obtained at a low price because of no necessity for high temperature heat treatment.

Description

[Detailed description of the invention] [Technical field of invention] The present invention relates to a method for manufacturing cutlery.

[Technical background of the invention and its problems]

Traditionally, cutting tools have been manufactured by processing materials such as &Kd carbon steel and tool steel, and I! After being ground to form the cutting edge, it undergoes a number of processes including heating and quenching to give it its hardness and sharpness. For this reason, it has the disadvantage that the cost per meter of making a cutter increases. In addition, the cutting edge of the cutting tool is easily damaged in a 1-meter shield, and particularly in the case of carbon steel, there is a drawback that it is damaged due to corrosion and MJ is difficult.

As mentioned above, as a measure to prevent damage to the 9th edge wheel.

Recently, metal has been applied to the cutting edge of cutlery using chemical vapor plating.

Methods of coating carbides, iiiides, borides, and oxides have been used.

However, the method described above is for the purpose of preserving the edge of the blade, and the hassle of manufacturing the blade itself has not been eliminated. Moreover, although the chemical vapor phase plating method is satisfactory in terms of performance, the operating temperature is limited. That is, since it is necessary to heat the cutter during chemical vapor plating, heat resistance is required. As a result, although it is suitable for manufacturing high-performance cutlery, it becomes expensive.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and is intended to be simplified.

[Summary of the invention]

The present invention will be explained in detail below.

First, a blade base material having a desired shape is subjected to pretreatment such as degreasing and plasting. Examples of the blade base material used here include lightweight metals such as At, Mg, TI, or alloys thereof, hard synthetic resins such as epoxy resins and phenol resins, carbon steel, stainless steel, and the like.

Next, a material having high hardness and wear resistance is coated on a desired surface of the blade base material, for example, the entire surface or the surface on which the cutting edge is to be formed, by a thermal spraying method. Examples of materials used here include high hardness metal powders such as chromium carbide, tungsten carbide, Ni: base, and Co base, At205. TiO
2. Ceramic powder such as ZrO□, or a mixed powder thereof, or one or more powders selected from the high hardness metal powder and ceramic powder.The balance consists of synthetic resin powder. Mixed powder etc. can be mentioned.

Next, at least the coating layer of the coated base material is processed and polished to produce a cutlery. Specifically, when the blade base material has the shape of a blade, the blade is manufactured by polishing the coating layer on the surface where the blade edge is formed.

Further, when the blade base material is in the form of a band, the coating layer and the base material are cut into the desired blade shape, and then the coating layer is polished to produce the blade.

111. However, since the method of the present invention coats the blade base material with a highly hard and wear-resistant material by thermal spraying, it is possible to form a coating layer on the base material with good adhesion, and it is also possible to form a coating layer on the base material with good adhesion. Thus, the coating layer can be formed without heating the base material. As a result, all materials except a small portion of low melting point materials from high melting point materials such as metals, ceramics, and synthetic resins can be used as the base material. Therefore, if a synthetic resin such as At, an At alloy, an Mg alloy, or a Ti alloy is used as the knife base, and the coating layer is processed and polished, an extremely lightweight knife can be obtained. - If the blade base material is made of a soft material, it will be extremely easy to process, and it will also be possible to manufacture blades with complex shapes. Furthermore, it is also possible to construct the blade base material from a non-magnetic material, making it possible to obtain a wide variety of blades.

In addition, since the cutting edge is formed by polishing the coating layer, which has high hardness and wear resistance, it has excellent corrosion resistance and sharpness.

A blade with excellent mechanical strength can be obtained.

[Embodiments of the invention]

Example 1 First, a very soft copper plate 1 having a thickness of 2 mm was prepared as a base material for a knife (as shown in FIG. 1). Subsequently, this steel 5-plate 1 was subjected to surface degreasing and sandblasting with an alumina grid, and then thermal spraying distance 90 wm, current value 750 people, arc gas Ar, thermal spray powder speed 200-3
75-95ch WC-5-25 under 00 mlsea conditions
An alloy powder of q6Co was thermally sprayed onto one side of the steel plate 10 to form a WC-Co coating layer 2 having a thickness of 150 μm (as shown in FIG. 2).

Next, after cooling with Ar gas to adjust the temperature rise of the steel plate 1, the side cover, edge, and surface of the coating layer 2 were polished from the steel plate 1 to the coating layer 2, thereby producing a cutter 4 having a cutting edge 3. (Illustrated in Figure 3) When ordinary paper was cut using the obtained knife, it was found that it showed the same sharpness as a conventional knife made of carbon steel, and was more than twice as durable. In addition, since high-temperature heat treatment was not required, the cutlery could be obtained at low cost.

Example 2 After subjecting the T and I plates to the same pretreatment as in Example 1, the thermal spraying distance was 180 m, the current value was 900 people, and the arc gas Ar
A CrC-NiCr alloy powder was sprayed onto one side of the Tj plate at a spray powder rate of 600 to 700 ml sec6- to form a coating layer with a thickness of 150 μm. Next, it was processed and polished in the same manner as in Example 1 to produce a cutlery.

The obtained cutter has the same sharpness as a conventional cutter made of carbon steel, and since the base material is made of a strong TI plate, it has excellent durability in applications with somewhat high cutting loads, and is also superior in terms of corrosion resistance. I found it to be excellent. It was also significantly lighter than conventional knives.

Example 3 After subjecting the At plate to the same pretreatment as in Example 1, the spraying distance was 110 m, the current value was 800 A, and the arc gas Ar
, 99.9% under the condition of thermal spray powder speed of 300m/sea
At205 powder was sprayed onto one side of the At plate to a thickness of 150~
A 300 μm kt203# coating layer was formed. Then,
A cutlery was obtained by processing and polishing in the same manner as in Example 1.

The obtained cutter had the same sharpness as a conventional cutter made of carbon steel, and was lightweight, about 1/3 of the weight of the same cutter. This knife did not exhibit magnetism and was useful for cutting magnetic chives.

Example 4 First, a Duracon resin plate was prepared as a blade base material, and this resin plate was subjected to surface degreasing and sandblasting using a steel grid. Next, the spraying distance was 90 m, the current value was 750 A, the arc gas was Ar, and the spray powder speed was 500 m.
CrC/25N i -Cr alloy powder was sprayed at high speed on one side of a Duracon resin plate cooled with one Ar gas under the conditions of 150 μm thick.
-A Cr coating layer was formed.

Next, it was processed and polished in the same manner as in Example 1 to obtain a cutlery.

The obtained cutter had good sharpness, was lightweight, and had excellent corrosion resistance.

〔Effect of the invention〕

As described in detail above, according to the present invention, the tip of the cutting edge is prevented from being damaged by a simple process, and has corrosion resistance.

It has excellent cutting properties, and is lightweight because all materials, from high melting point materials to low melting point materials, can be used as the base material for the cutting edge.
Since it is possible to make the blade non-magnetic, it is possible to provide a method for manufacturing cutlery that can be used in a wide variety of fields.

[Brief explanation of drawings]

1 to 3 are cross-sectional views showing the manufacturing process of a cutlery in Example 1 of the present invention. DESCRIPTION OF SYMBOLS 1... Extremely mild steel plate, 2... WC-C coating layer, 3...
Blade tip, 4...Knife. Applicant's agent Patent attorney Takehiko Suzue 9- Figure 1 Figure 2

Claims (4)

[Claims] (1) A method for manufacturing a cutlery, which comprises coating a desired surface of a cutter base material with a material having high hardness and wear resistance by thermal spraying, and then processing and polishing at least the coating layer. (2) Claim 1, characterized in that the cutting edge base material is made of one selected from At, Mg, 'pi, or an alloy thereof, or a hard synthetic resin such as epoxy resin or phenol resin. Method for manufacturing the cutlery described in Section 1. (3) At2o3 is a material with high hardness and wear resistance.
2. The method for manufacturing a cutlery according to claim 1, wherein the cutlery is selected from powders such as TiO□, ZrO□, CrC, and WC, or mixed powders thereof. (4) Material with high hardness and wear resistance is At203°T
iO, zro2. 1 type or 2 selected from CRC and WC
Claim 11J, characterized in that the amount of powder is 75 to 99 g, and the balance is synthetic resin powder.
Method of manufacturing the described cutlery.