Unlock instant, AI-driven research and patent intelligence for your innovation.

Titanium sintered body and ornament

a technology of titanium and ornaments, applied in the field of titanium sintered bodies and ornaments, can solve the problems of poor weather resistance, difficult to increase surface smoothness, appearance problems, etc., and achieve the effect of good specularity and excellent aesthetic appearan

Inactive Publication Date: 2017-03-09
SEIKO EPSON CORP
View PDF5 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a process to make a titanium sintered body and an ornament that can maintain good specularity (a shiny appearance) for a long time. The process includes creating a titanium powder, pressing it into a solid shape, and then heating it to high temperatures to create a sintered body. The resulting sintered body has a smooth surface with very few polishing marks, and can maintain its shiny appearance over a long period of time. This process also results in a titanium sintered body with excellent mechanical properties and weather resistance, making it a desirable material for use in various applications. The finished ornament made from this sintered body also maintains its shiny appearance for a long time, providing an excellent aesthetic appearance.

Problems solved by technology

However, a titanium sintered body produced by a powder metallurgy method is likely to reflect the properties of a starting material powder, and it is difficult to increase the surface smoothness.
Due to this, the specularity of the titanium sintered body is easy to decrease, which can cause a problem of appearance.
However, the titanium alloy disclosed in PTL 1 contains iron in addition to titanium, and therefore has poor weather resistance.
Due to this, in the case where the titanium alloy is exposed to a harsh environment for a long period of time, deterioration occurs on the surface, resulting in lowering the specularity.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Titanium sintered body and ornament
  • Titanium sintered body and ornament
  • Titanium sintered body and ornament

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0135](1) First, a Ti-6Al-4V alloy powder having an average particle diameter of 23 μm produced by gas atomization method was prepared.

[0136]Subsequently, a mixture (organic binder) of polypropylene and a wax was prepared and weighed so that the mass ratio of the starting material powder to the organic binder was 9:1, whereby a composition for producing a titanium sintered body was obtained.

[0137]Subsequently, the obtained composition for producing a titanium sintered body was kneaded using a kneader, whereby a compound was obtained. Then, the compound was processed into pellets.

[0138](2) Subsequently, molding was performed under the following molding conditions using the obtained pellets, whereby a molded body was produced.

[0139]Molding Conditions

[0140]Molding method: metal injection molding method

[0141]Material temperature: 150° C.

[0142]Injection pressure: 11 MPa (110 kgf / cm2)

[0143](3) Subsequently, the obtained molded body was subjected to a degreasing treatment under the followi...

examples 2 to 6

[0161]Titanium sintered bodies were obtained in the same manner as in Example 1 except that the production conditions were changed so that the average grain size of the α-phase, the area ratios occupied by the α-phase and the β-phase, and the average aspect ratio of the α-phase were as shown in Table 1, respectively.

reference example 1

[0163]First, a Ti-6Al-4V alloy ingot material was prepared.

[0164]Subsequently, the prepared ingot material was cut and the cut surface was polished by a buffing treatment.

[0165]Subsequently, the polished surface was observed by an electron microscope, and the average grain size of the α-phase, the area ratios occupied by the α-phase and the β-phase, and the average aspect ratio of the α-phase were obtained, respectively. The results are shown in Table 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
grain sizeaaaaaaaaaa
grain sizeaaaaaaaaaa
aspect ratioaaaaaaaaaa
Login to View More

Abstract

A titanium sintered body contains an α-phase and a β-phase as crystal structures, wherein the average grain size of the α-phase in a cross section is 3 μm or more and 30 μm or less, and an area ratio occupied by the α-phase in a cross section is 70% or more and 99.8% or less. In the titanium sintered body, it is preferred that the average aspect ratio of the α-phase in a cross section is 1 or more and 3 or less. It is also preferred that the titanium sintered body contains titanium as a main component, and also contains an α-phase stabilizing element and a β-phase stabilizing element.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to Japanese Patent Application Nos. 2015-176071 filed Sep. 7, 2015 and 2016-107641 filed May 30, 2016. The entire disclosures of Japanese Patent Application Nos. 2015-176071 and 2016-107641 are hereby incorporated herein by reference.BACKGROUND[0002]1. Technical Field[0003]The present invention relates to a titanium sintered body and an ornament.[0004]2. Related Art[0005]A titanium alloy has excellent mechanical strength and corrosion resistance, and therefore has been used in the field of aircraft, space development, chemical plants, and the like. Further, recently, by utilizing the characteristics such as biocompatibility and a low Young's modulus of a titanium alloy, a titanium alloy has begun to be applied to exterior components of watches, ornaments such as glasses frames, sporting goods such as golf clubs, springs, and the like.[0006]Further, in the application of a titanium alloy in this manner, by ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): C22C14/00B22F3/15B22F3/10B22F1/00B22F3/22B22F1/05B22F1/102
CPCC22C14/00B22F1/0011B22F3/15B22F3/225B22F3/1007B22F1/0062B22F3/10B22F1/102B22F1/05B22F2998/10B22F1/10B22F3/1021B22F5/10C22C1/0458G04B37/22B22F2999/00A44C27/002B22F3/227
Inventor KAWASAKI, TAKUNAKAMURA, HIDEFUMI
Owner SEIKO EPSON CORP