JP2005314766A - Method for manufacturing metallic product, and the product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a metallic product, which is applied to a soft and hardly surface-finished metal such as a magnesium alloy and a magnesium-aluminum alloy, and to provide the product. <P>SOLUTION: The manufacturing method includes the step (1) of acquiring a surface-modified workpiece by modifying the surface of a workpiece having a predetermined specification with the use of a vacuum sputtering device, and the step (2) of coating or painting the surface-modified workpiece to finish it into the metallic product. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method of manufacturing a metal product and the product, and more particularly to a metal surface modification method and a product manufactured by the method, and the method can be executed in a general sputtering machine, for example, a magnesium alloy product. The present invention relates to a method of manufacturing a metal product and its product, which can be applied to a wall surface of a casing, and is particularly applied to soft and difficult-to-work metals such as magnesium alloy and magnesium-aluminum alloy.

  For the production of general magnesium alloy products, for example, all liquid die-casting, semi-solid touch-transforming, solid punching, forging, etc. After the above magnesium alloy material is processed, it is subjected to anti-corrosion anti-oxidation treatment and then coating, painting, electroplating, etc. according to actual application and needs By doing so, the final magnesium alloy product required is obtained. However, magnesium alloys can create many gas holes that are unavoidable in the pre-manufacturing process, and this type of structural defect can cause subsequent film corrosion prevention antioxidant treatment processes. In this case, it is further expanded to become a concentrated portion of the remaining acidic substances, remaining alkaline substances, water gas, and the like.

  The prior art related to the subsequent manufacturing process for the conventional magnesium alloy product includes, for example, (1) For manufacturing related to the internal member, the formed casting is processed by machining, and then the film is formed. Finishing after carrying out oxidation corrosion prevention treatment, and (2) For the production of external parts, after casting is processed by machining, filming treatment is performed, and after antioxidant corrosion prevention treatment is carried out, coating treatment Or it has main technical means, such as what is finished after performing a painting process.

  In addition, after the film treatment is completed, a phenomenon in which the structural defects in the previous process are formed in a liquid state and contained in the inside is generated, and therefore, the magnesium alloy base material is continuously corroded. This type of defect, for the components inside the magnesium alloy, can create an unsightly part because the location and range of the corrosion hole is continuously expanded, There is also an adverse effect on the strength of the structure of the member, which may infringe on the safety of the product. Especially for articles that use magnesium alloy products for many appearances, the above-mentioned defects in the structure of the gas hole react to continue to corrode the substrate near the surface layer, as well as coating processing and painting. Even during processing, due to the effect of the baking temperature, the liquid remaining in the gas hole is heated and vaporized, and a spot-like explosive structure of star-like parts such as coating layers and painting layers May form defects such as coating and painting. Therefore, it is necessary to eliminate the problem of surface defects of the conventional magnesium alloy coating product by repeating the processing a plurality of times. As a result, not only is human power wasted, but the manufacturing cost is improved and the yield is deteriorated, which may deteriorate the overall competitiveness of the magnesium product.

  Therefore, a unique feature of the present invention is that by introducing a technique that combines the traditional magnesium alloy forming process with the vacuum sputtering process, the produced work piece is subjected to its final coating and painting. Prior to processing, the surface modification step is performed first. Magnesium alloy that can obtain a good surface modification effect by selecting the appropriate metal target material and introduced gas, adjusting the parameters of the vacuum sputtering process, and controlling the phase of the plated film structure Get the work piece. As a result, in the execution process such as the subsequent coating process and painting process, it effectively causes unfavorable things such as explosion of the coating layer and painting layer, and reduces the number of repeated processes. The effect of eliminating the problem and greatly improving the yield and manufacturing efficiency of magnesium alloy products.

  Compared with the prior art, the main difference of the manufacturing method according to the present invention is that after the film treatment is performed on the processed magnesium alloy work piece, before the final coating process or painting process is performed, First, a vacuum sputtering modification process is performed, and then processing such as coating and painting is performed to obtain a magnesium alloy product having good coating and painting efficiency disclosed in the present invention, Improve the effectiveness of using magnesium alloy products. In a manufacturing flow of a certain magnesium alloy product, a vacuum hard film sputtering process is directly performed after machining, and the conventional intermediate film reaction chemical conversion process is removed. In other words, the vacuum hard film sputtering process can carry out the surface modification process of magnesium alloy products and can replace the chemical film reaction of the conventional chemical wet dipping process, providing good corrosion prevention function and antioxidant Can provide functions.

  In the conventional apparatus, like the magnesium alloy product shown in FIG. 1, after performing the conventional film formation processing and coating processing or painting processing, the processing process shown in FIG. Get the effect shown. Such methods and products have the problem of non-uniform surface fineness and the creation of through holes, which can be processed at higher temperatures using more convenient system arrangement techniques. In addition, there is a need to provide a metal processing method and an excellent product by the method that are extremely cheap in operating cost.

  The present invention can perform surface modification, can provide a corrosion prevention function, can reduce operating costs, and can be used for external and internal members, greatly improving yield and quality. The main problem to be solved is to provide a method for manufacturing a metal product and to provide the product.

  In order to solve the above-mentioned problems, the present invention refers to a conventional metal product manufacturing process, and introduces a vacuum sputtering surface modification treatment after machining or film conversion treatment, thereby enabling coating processing or painting. The present invention provides an effective surface modification method for a magnesium alloy by generating a treated surface that can be easily subjected to a machining process.

  The method according to the present invention comprises at least the following steps, i.e. a workpiece modified by performing a surface modification on the surface of a workpiece of a given specification by means of a vacuum sputtering device. A step (1) of obtaining a piece, and a step (2) of producing a metal product by performing a coating process or a painting process on the modified work piece.

  Further, the product according to the present invention has a configuration as described later, that is, a metal body, a surface-modified plating film covered by the metal body, and a coating layer or a coating layer covered by the surface-modified plating film. And a painting layer.

  In order to disclose the features and technical contents of the present invention in more detail, embodiments of the present invention will be described in detail and specifically with reference to the accompanying drawings. It is needless to say that the specific configuration is merely an example in which the present invention can be implemented, and does not narrowly define the technical gist of the present invention.

  FIG. 1 shows a manufacturing flow after performing conventional film formation, coating and painting on a magnesium alloy work piece, and vacuum according to the present invention after film formation and before coating and painting. -It is a comparison figure which shows the flow of implementing processes, such as final coating and painting, after introducing a sputtering surface modification process. As shown in FIG. 5 (the surface of the product of the present invention) and FIG. 4 (the surface of the conventional product), the surface defects 1 shown in FIG. 4 may be introduced during processing such as coating and painting. The drawing is a photograph showing the substance of the final product obtained by two or two types of manufacturing processes, in which the magnesium alloy body 2 has a complicated structure, for example, a void 3. When both are compared, it clearly shows the effect of improving the surface properties of the magnesium alloy product of the present invention, and the reason for the limitations in the manufacturing process according to the present invention will be described in detail below with reference to experimental examples. Execute.

The present invention has the following conditions:
(1) Vacuum condition: The sputtering process needs to be performed in a vacuum environment, and as a result, during the processing process, a plating film is formed by an oxidation phenomenon due to an increase in temperature and a non-uniform atmosphere in the processing chamber. According to the present invention, the degree of vacuum of the sputtering film plating manufacturing process is controlled between ¹ × 10 ⁻¹ and ¹ × 10 ⁻⁵ torr.
(2) Film thickness range: Control operating on the thickness of the thin film by sputtering can be counted as one of the important factors in the surface modification process of the magnesium alloy workpiece. By reducing the thickness of the thin film, the processing time of the sputtering process can be shortened and its production speed can be accelerated. However, when the thickness is insufficient, the coating effect of the gas hole on the substrate may be deteriorated, so that it is not appealing to improve the coating or painting quality desired by the present invention. On the other hand, if the thickness of the thin film by sputtering is too thick, it can appeal for excellent gas / hole coating effect, but the residual stress is large, so the interface strength between the plating film layer and the substrate becomes insufficient. The final coating and painting processes, such as the conventional one hundred percent rank test, have lost their practicality because they cannot meet the chuck's needs for adhesion. Therefore, it is possible to achieve the excellent surface modification effect claimed by the present invention by suitably setting the thickness of the thin film by sputtering, particularly by controlling the thickness to 0.1 to 3.5 microns.

  Examples of the present invention will be described as follows. In the present invention, a metal plating film having a different composition and a different configuration is processed and formed by combining an operation of adjusting the atmosphere of an oven in a vacuum chamber with a different metal target, and then processing such as coating and painting is performed. By doing so, the effect of modifying the surface of the magnesium alloy with a hard film composition is finely adjusted and set.

Table 1 shows the surface modification of the magnesium alloy by changing the pressure concentration of the introduced gas and adjusting the sputtering parameters after selecting a single metal target of the present invention or two or more metal targets. It is a table which shows the result when quality is advanced. As shown in the results of the table, the composition of the sputtering hard film includes chromium nitride (CrN to Cr ₂ N), titanium nitride (TiN), titanium nitride / aluminum ((Ti, Al) N), and other plating. Regardless of the use of a membrane material or the like, the present invention can obtain an excellent surface modification effect by controlling an appropriate manufacturing process. Therefore, in the case of the present invention, the applicable range is not limited to the above-described plural kinds of metal compounds, and can be applied to all cases of general hard film plating layers.

  As can be seen from the properties of the thin film, such as anti-wear adhesion (100 percent rank test), the anti-corrosion (salt fog test), and the gas hole cover, the method of the present invention is a general magnesium. The problem of surface material due to machining of alloy products is greatly improved, especially the surface wear resistance and hardness of magnesium alloy are usually bad, and the thickness of the thin film of sputtering according to the present invention is set appropriately (0 1 to 3.5 microns), it has the effect of being able to prevent wear hardness and coating corrosion at the same time, and is an excellent invention rarely seen, which is obvious in the current competitive market Appealing inventive step.

  According to the manufacturing process of the present invention, it is possible to obtain an intermediate metal thin film coating made of chromium nitride, titanium nitride, titanium nitride / aluminum, or the like finished by vacuum sputtering, and to perform surface modification processing of a magnesium alloy product. In addition, processes such as ion-collision processing, surface fineness adjustment processing, gas / hole erasing processing, flattening and repairing, etc. greatly improve the yield of repeated coating and painting processing of magnesium alloy products, and repeat processing Provided is a production method capable of obtaining a magnesium alloy product having reduced surface properties and excellent surface properties by a surface modification process of a kind of coating pretreatment. As can be seen from the above series of studies, the manufacturing process according to the present invention is not only applied to general ordinary AZ91 materials, but also to other conventional magnesium alloy materials such as AZ31, AM50, AM60, etc. Apply. The manufacturing method of the work piece should employ a processing method such as die-casting of all liquids, semi-solid touch-transforming, solid punching, or forging. Nevertheless, all are applicable. In addition, all of the conventional ion sputtering processing, plasma sputtering processing, vacuum response sputtering processing, etc. can be used for the sputtering thin film manufacturing process. The difference in the processing method does not affect the surface modification effect of the magnesium alloy workpiece of the coating layer. As such, the claimed scope of the present invention should encompass all magnesium alloy products that apply to all forming manufacturing processes and their associated sputtering processes.

  As shown in FIGS. 2 and 3, the present invention further includes the following steps: surface modification of the surface of a work piece of a specified specification by a vacuum sputtering device. A step (1) of obtaining a work piece modified by the step (2), and a step (2) of producing a metal product by performing a coating process, a painting process, etc. on the modified work piece. Is included.

In the following, possible embodiments of the present invention will be described, and the present invention can introduce two further steps before each of the above steps, i.e. the initial work piece by means of the metal raw material by the forming equipment. And a step (2) of modifying the initial work piece into a work piece of a predetermined specification by a machining facility. Furthermore, after the machining modification step, a step of performing surface modification after performing a film forming process on a work piece processed and formed to a predetermined specification may be introduced. In the step of plating a film on the surface of a work piece having a predetermined specification by the vacuum sputtering device and modifying it to produce a modified work piece, the sputtering plating film The vacuum of the manufacturing process can be controlled and operated in the range of ¹ × 10 ^{−1 to 1} × 10 ⁻⁵ torr, and a film is formed on the surface of a work piece of a predetermined specification by the vacuum sputtering device and modified. After the quality and modified work piece is created, the thickness of the thin film can be controlled and operated between 0.1 to 3.5 microns, and the vacuum sputtering device allows the specified specifications. Plating and modifying the surface of the work piece After creating a modified work piece, that the composition of the modifying material is Ya chromium nitride (CrN~Cr ₂ N) or titanium nitride (TiN) or titanium nitride aluminum ((Ti, Al) N) Other plating film materials can be used. Among them, magnesium alloy materials such as AZ91, AZ31, AM50, and AM60 can be adopted as the metal raw material. Generally speaking, the initial work piece molding equipment is die-cast in all liquids, semi-solid touch transform molding, solid punching, or forging. A processing machine such as can be employed.

Further, in the structure of the product of the present invention, the metal body, the surface modified plating film covered with the metal body, the surface coating layer or the painting layer covered with the surface modified plating film, and the metal A chemical conversion film interposed between the main body and the surface-modified plating film, and the composition of the thin film material of the surface-modified plating film is chromium nitride (CrN to Cr ₂ N) or nitriding Titanium (TiN), titanium nitride / aluminum ((Ti, Al) N), and other plating film materials can be used. Among them, a member made of a magnesium alloy material such as AZ91, AZ31, AM50, or AM60 can be suitably employed as the metal body.

Excellent industrial applicability according to the present invention includes at least the following items:
(1) It is possible to effectively reduce the unsuitability of the coating layer, the painting layer, etc., and to reduce the number of processing steps, and to greatly improve the yield and production rate of the magnesium alloy product.
(2) In addition to being able to use a vacuum hard film sputtering process as a surface modification treatment for magnesium alloy products, the chemical film reaction by conventional chemical wet immersion can be replaced, resulting in good corrosion prevention effects. Can provide antioxidant function.
(3) Workpiece manufacturing methods include all-liquid die-casting, semi-solid touch-transforming, solid punching, and forging. All can be adopted.
(4) About adopting the sputtering thin film manufacturing process, all of conventional ion sputtering processing, plasma sputtering processing, vacuum response sputtering processing, etc. can be adopted, and the machine in the factory can be flexibly applied.
(5) The present invention is not only applied to a general and commonly used AZ91 material, and other AZ31, AM50, AM60, and other conventional magnesium alloy materials can also be used.
(6) The range of magnesium alloy products to be applied is that of all-liquid die-casting, semi-solid touch-transforming, solid punching, forging, etc. Is covered.

  Further, what has been described above is merely possible embodiments of the present invention, and does not limit the claimed scope of the present invention, such as the description, drawings, and claims of the present invention. Needless to say, all modifications, alterations, and partial diversions that have homologous effects that are implemented based on any gist included in the technique should be delivered within the scope of the claims of the present invention.

It is explanatory drawing which shows the manufacturing method of the product of the conventional magnesium alloy. It is explanatory drawing which shows the manufacturing method of the product of the magnesium alloy of this invention. It is explanatory drawing which shows other embodiment of the manufacturing method of the product of the magnesium alloy of this invention. It is explanatory drawing which shows the product created with the manufacturing method of the conventional magnesium alloy product. It is explanatory drawing which shows the product created with the manufacturing method of the magnesium alloy product of this invention.

Explanation of symbols

1 Surface defect 2 Magnesium / aluminum alloy body 3 Void

Claims (5)

Obtaining a modified work piece by performing a surface modification on the surface of the work piece of a predetermined specification by means of a vacuum sputtering device;
And a step (2) of producing a metal product by performing a coating process, a painting process, etc. on the modified work piece.   Two more steps are introduced before each of the above steps, i.e. the step (1) in which the metal raw material is processed to form an initial work piece by means of a forming facility, and the initial work piece by means of a machining facility. (2) for modifying the workpiece so as to become a workpiece having a predetermined specification, and further, after the machining modification step, On the other hand, after the film chemical conversion treatment is performed, a step of performing surface modification may be introduced. In addition, the initial work piece molding equipment may be an all-liquid die cast molding, a semi-solid It is characterized by adopting processing machines such as touch transform forming, solid punch processing and forging molding Method for producing a metal product according to Motomeko 1. In the step of plating a film on the surface of a work piece having a predetermined specification by the vacuum sputtering device and creating a modified work piece, the degree of vacuum in the manufacturing process of the sputtering plating film is set. The workpiece can be controlled and operated between ¹ × 10 ^{−1 and 1} × 10 ⁻⁵ torr, and the workpiece is plated and modified on the surface of a workpiece having a predetermined specification by the vacuum sputtering device. The film thickness can be controlled and operated between 0.1-3.5 microns, and the surface of the workpiece can be plated with the above-mentioned vacuum sputtering device. Forming and modifying work pieces After the release, the composition of the modified material can be chromium nitride, titanium nitride, titanium nitride / aluminum, or other plating film materials, among which AZ91, AZ31, The method for producing a metal product according to claim 1, wherein a magnesium alloy material such as AM50 or AM60 is used. A metal body,
A surface-modified plating film covered with the metal body;
With a surface coating layer or a painting layer covered with the surface modified plating film,
Metal product characterized by comprising.   Furthermore, a chemical conversion film interposed between the metal main body and the surface modified plating film is provided, and the composition of the thin film material of the surface modified plating film is chromium nitride, titanium nitride, titanium nitride / aluminum, 5. A material made of a magnesium alloy material such as AZ91, AZ31, AM50, or AM60 is preferably used as the metal main body. Metal products.

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