Coated member and surface-coated mold

Abstract

To provide a coating layer with extended durability.SOLUTION: A coated member comprises a coating layer formed on a surface of a substrate, the coating layer being represented by TiaMbXc (where M is at least one selected from Group IVa, Group Va, Group VIa elements, aluminum, silicon, and composites thereof, X is carbon, nitrogen, or a composite thereof, and in the case of a+b+c=1, (a+b) is 0.05 to 0.45), and the coating layer having a Vickers hardness Hv of 1500 to 3200.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a coated member and a surface-coated mold. [Background technology]

[0002] For example, Patent Document 1 discloses a film formation method for forming a VN film on the surface of an inorganic substrate by ion plating. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-371352 Summary of the Invention [Problem to be solved by the invention]

[0004] The object is to provide a coating having a longer service life. [Means for solving the problem]

[0005] The coated member according to the present invention is a coated member in which a coating is formed on the surface of a substrate, and the coating is Ti a M b X c (wherein M is a group IVa, Va, or VIa element, aluminum, silicon, or a composite thereof; X is carbon, nitrogen, or a composite thereof; and when a+b+c=1, (a+b) is 0.05 or more and 0.45 or less), and the Vickers hardness Hv of the coating is 1500 or more and 3200 or less.

[0006] Preferably, the coating is Ti a M b C d N e (wherein M is chromium or vanadium or is absent, and when a+b+d+e=1, e is 0.00 or more and 0.25 or less), and the Vickers hardness Hv of the coating is 1500 or more and 2600 or less.

[0007] Preferably, the coating is Ti a C d (However, when a+d=1, d is 0.45 or more and 0.70 or less), and the Vickers hardness Hv of the coating is 1500 or more and 3200 or less.

[0008] Preferably, the coating is Ti a M b C d (wherein M is chromium or vanadium, and when a+b+d=1, a is 0.05 or more and 0.45 or less), and the Vickers hardness Hv of the coating is 1500 or more and 2800 or less.

[0009] The surface-coated mold according to the present invention comprises a mold body and a coating that coats at least a part of the surface of the mold body, and the coating comprises Ti a M b X c (wherein M is a group IVa, Va, or VIa element, aluminum, silicon, or a composite thereof; X is carbon, nitrogen, or a composite thereof; and when a+b+c=1, (a+b) is 0.05 or more and 0.45 or less), and the Vickers hardness Hv of the coating is 1500 or more and 3200 or less. [Effects of the Invention]

[0010] This can provide a coating with a longer lifespan. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a diagram illustrating an example of TiC. [Figure 2] FIG. 1 is a diagram illustrating an example of TiCrC. [Figure 3] FIG. 1 is a diagram illustrating an example of TiVC. [Figure 4] FIG. 1 is a diagram illustrating an example of TiCN. [Figure 5] FIG. 1 is a diagram illustrating an example of TiCrCN. [Figure 6]FIG. 1 is a diagram illustrating an embodiment of TiVCN. DETAILED DESCRIPTION OF THE INVENTION

[0012] First, the background to the invention will be explained. Various coating films have been developed to impart wear resistance to molds, cutting tools, and jigs. High-hardness films, in particular, have high wear resistance, and high-hardness films with a Vickers hardness (hereinafter referred to as "HV") of around 3500, such as TiCN film, TiC film, VC film, TiAlN film, and even films with added Si, are used. On the other hand, there are cases where the mold or other part adheres to the workpiece, resulting in a shortened service life of the coating film. The HV hardness means the hardness measured in accordance with JIS Z 2244.

[0013] In view of the above circumstances, a novel Ti film is provided that extends the service life of molds, cutting tools, jigs, and other tools. The new Ti film has a hardness of HV1500 to HV3200 and is formed on the surface of molds and cutting tools using methods such as ion plating. The new Ti film is a M b X c (wherein M is a group IVa, Va, VIa, aluminum, silicon or a compound thereof, X is carbon, nitrogen or a compound thereof, and when a+b+c=1, (a+b) is 0.05 or more and 0.45 or less). More specifically, the novel Ti film is a M b C d N e (wherein M is chromium or vanadium or is absent, and when a+b+d+e=1, e is 0.00 or more and 0.25 or less), and the Vickers hardness Hv is 1500 or more and 2600 or less. Alternatively, the novel Ti film may be Ti a C d(However, when a+d=1, d is 0.45 or more and 0.70 or less), and the Vickers hardness Hv is 1500 or more and 3200 or less. Alternatively, the novel Ti film is Ti a M b C d (wherein M is chromium or vanadium, and when a+b+d=1, a is 0.05 or more and 0.45 or less), and the Vickers hardness Hv is 1500 or more and 2800 or less. The subscripts "a, b, c, d, e" represent the composition ratio of the elements that make up the novel Ti film. The new Ti film is formed by physical vapor deposition (PVD), more specifically, ion plating, while adjusting the supply amounts of the constituent elements.

[0014] Figure 1 shows the Ti film a C d 10A and 10B are diagrams illustrating an example and a comparative example in the case where a+d=1. When a coating was formed by adjusting the ratio of titanium (Ti) and carbon (C), the hardness (Hv) and the evaluation results of a ball-on-disk load test were obtained, as shown in Figure 1. Therefore, a coating having a carbon C composition ratio d of 0.45 or more and 0.70 or less and a hardness of 1500 or more and 3200 or less is preferred.

[0015] Figure 2 shows the Ti film a Cr b C d 10A and 10B are diagrams illustrating an example and a comparative example in the case where a+b+d=1. When a coating was formed by adjusting the ratio of titanium (Ti), chromium (Cr), and carbon (C), the hardness (Hv) and the evaluation results of a ball-on-disk load test were obtained, as shown in FIG. 2. Therefore, a coating having a titanium Ti composition ratio a of 0.05 or more and 0.45 or less and a hardness of 1500 or more and 2800 or less is preferred.

[0016] Figure 3 shows that the new Ti film a V b C d10A and 10B are diagrams illustrating an example and a comparative example in the case where a+b+d=1. When a coating was formed by adjusting the ratio of titanium (Ti), vanadium (V), and carbon (C), the hardness (Hv) and the evaluation results of a ball-on-disk load test were obtained, as shown in FIG. Therefore, a coating having a titanium Ti composition ratio a of 0.05 or more and 0.45 or less and a hardness of 1500 or more and 2800 or less is preferred.

[0017] Figure 4 shows that the new Ti film a C d N e 10A and 10B are diagrams illustrating an example and a comparative example in the case where a+d+e=1. When a coating was formed by adjusting the ratio of titanium (Ti), carbon (C), and nitrogen (N), the hardness (Hv) and the evaluation results of a ball-on-disk load test were obtained, as shown in Figure 4. Therefore, a coating having a composition ratio e of nitrogen N of 0.00 or more and 0.25 or less and a hardness of 1500 or more and 2600 or less is preferred.

[0018] Figure 5 shows that the new Ti film a Cr b C d N e 10A and 10B are diagrams illustrating examples and comparative examples in the case where a+b+d+e=1. When a coating was formed by adjusting the ratio of titanium (Ti), chromium (Cr), carbon (C), and nitrogen (N), the hardness (Hv) and the evaluation results of a ball-on-disk load test were obtained, as shown in Figure 5. Therefore, a coating having a composition ratio e of nitrogen N of 0.00 or more and 0.25 or less and a hardness of 1500 or more and 2600 or less is preferred.

[0019] Figure 6 shows that the new Ti film a V b C d N e 10A and 10B are diagrams illustrating examples and comparative examples in the case where a+b+d+e=1. When a coating was formed by adjusting the ratio of titanium (Ti), vanadium (V), carbon (C) and nitrogen (N), the hardness (Hv) and the evaluation results of a ball-on-disk load test were obtained, as shown in Figure 6. Therefore, a coating having a composition ratio e of nitrogen N of 0.00 or more and 0.25 or less and a hardness of 1500 or more and 2600 or less is preferred.

[0020] As explained above, the novel Ti film of this embodiment is less prone to adhesion and has higher wear resistance than conventional titanium-based coatings. Therefore, dies or cutting tools coated with this novel Ti film can achieve a longer service life.

Claims

1. A coated member in which a coating film is formed on the surface of a substrate, The coating is Ti ａ M ｂ X ｃ (wherein M is a group IVa, Va, VIa, aluminum, silicon or a compound thereof, X is carbon, nitrogen or a compound thereof, and when a+b+c=1, (a+b) is 0.05 or more and 0.45 or less), The Vickers hardness Hv of the coating is 1500 or more and 3200 or less. Coated material.

2. The coating is Ti ａ M ｂ C ｄ N ｅ (wherein M is chromium or vanadium or is absent, and when a+b+d+e=1, e is 0.00 or greater and 0.25 or less), The Vickers hardness Hv of the coating is 1500 or more and 2600 or less. The coated member according to claim 1 .

3. The coating is Ti ａ C ｄ (However, when a+d=1, d is 0.45 or more and 0.70 or less), The Vickers hardness Hv of the coating is 1500 or more and 3200 or less. The coated member according to claim 1 .

4. The coating is Ti ａ M ｂ C ｄ (wherein M is chromium or vanadium, and when a+b+d=1, a is 0.05 or more and 0.45 or less), The Vickers hardness Hv of the coating is 1500 or more and 2800 or less. The coated member according to claim 1 .

5. A mold body; a coating that covers at least a portion of the surface of the mold body; and The coating is Ti ａ M ｂ X ｃ (wherein M is a group IVa, Va, VIa, aluminum, silicon or a compound thereof, X is carbon, nitrogen or a compound thereof, and when a+b+c=1, (a+b) is 0.05 or more and 0.45 or less), The Vickers hardness Hv of the coating is 1500 or more and 3200 or less. Surface coating mold.

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