AU2008100629A4 - Titanium alloy fastener - Google Patents
Titanium alloy fastener Download PDFInfo
- Publication number
- AU2008100629A4 AU2008100629A4 AU2008100629A AU2008100629A AU2008100629A4 AU 2008100629 A4 AU2008100629 A4 AU 2008100629A4 AU 2008100629 A AU2008100629 A AU 2008100629A AU 2008100629 A AU2008100629 A AU 2008100629A AU 2008100629 A4 AU2008100629 A4 AU 2008100629A4
- Authority
- AU
- Australia
- Prior art keywords
- titanium alloy
- fastener
- titanium
- alloy fastener
- screw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Description
P/00/012 Regulation 3.2
AUSTRALIA
Patents Act 1990 0\ oo 0
OO-
00
ORIGINAL
COMPLETE SPECIFICATION INNOVATION PATENT Invention Title: "TITANIUM ALLOY FASTENER" The following statement is a full description of this invention, including the best method of performing it known to us: 260045 1.DOC 00 TITANIUM ALLOY FASTENER BACKGROUND OF THE INVENTION n 1. Field of the Invention: 00 The present invention relates to screw fasteners and more particularly, to a titanium alloy fastener made of titanium alloy and covered with a layer of a titanium nitride coating.
00 2. Description of the Related Art: ,i Conventional screw fasteners 10, such as screw bolts 101 or nuts 102 (see FIG. 1) or self-tapping screws 104 (see FIG. 2) are commonly made of metal and processed through a heat treatment to improve the hardness.
The aforesaid conventional screw fasteners 10 may be made of soft ferrite by means of press forging. However, soft ferrite is easy to get oxidized and has low strength and ability to resist acid and alkali salt. To provide a better strength, a screw fastener may be made of a high hardness material. However, the hardness of a ferrite series material is subject to its carbon content. A ferrite series material of low carbon content has a relatively higher hardness, however it is relatively fragile. A self-tapping screw 104 made of a ferrite series material having high hardness may break easily when it is driven into metal plate members Therefore, it is desirable to provide a screw fastener that eliminates the aforesaid problems.
00 SUMMARY OF THE INVENTION The present invention has been accomplished under the circumstances in view. It is one object of the present invention to 00 Sprovide a titanium alloy fastener, which effectively eliminates fragility, rust and corrosion problems of conventional screw
INO
fasteners. It is another object of the present invention to provide a 00 titanium alloy fastener, which has hard, tough, fatigue-limited, Ci lightweight, acid and alkali proof, rustproof and carbon-free material properties.
According to the present invention, a titanium alloy fastener a fastener body made of titanium alloy subject to a predetermined design and hardened through a heat treatment, and a titanium nitride coating formed on the whole surface of the fastener body by means of a nitrogen treatment.
Further, the titanium nitride coating has a hardness around 2000HV to 3500HV.
Further, the titanium alloy fastener can be a screw bolt, a nut, or a self-tapping screw.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view of a conventional screw and a conventional nut.
FIG. 2 illustrates an application example of a conventional self-tapping screw.
00 FIG. 3 is a schematic sectional plain view of a titanium c- alloy screw bolt made according to the present invention.
c- FIG. 4 is a schematic sectional plain view of a titanium 00 Salloy screw nut made according to the present invention.
FIG. 5 is a schematic sectional plain view of a titanium
(N
alloy rivet made according to the present invention.
00 FIG. 6 is a schematic sectional plain view of a titanium ci alloy self-tapping screw made according to the present invention.
FIG. 7 is an applied view of the titanium alloy self-tapping screw shown in FIG. 6.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 3, a titanium alloy fastener in accordance with the present invention comprises a titanium alloy fastener body 1 and a titanium nitride coating 11 covered on the whole surface of the titanium alloy fastener body 1. The titanium nitride coating 11 is formed on the surface of the titanium alloy fastener body 1 by means of a nitrogen treatment, having a hardness around 2000HV to 3500HV.
Further, the titanium alloy fastener can be a screw (see FIG.
screw nut (see FIG. or rivet (see FIG. As stated above, the invention provides a titanium alloy fastener, which comprises a fastener body 1 made of titanium alloy and hardened through a heat treatment and a high-hardness titanium 00 nitride coating 11 formed on the surface of the fastener body 1 CI through a nitrogen treatment. The titanium nitride coating 11 has a hardness around 2000HV to 3500HV. Therefore, a titanium alloy 00 0 fastener made according to the present invention has a combination 5 of high hardness and toughness.
Referring to FIGS. 6 and 7, a titanium alloy fastener made 00 according to the present invention can be a self-tapping screw (see ci FIG. 6) that can be driven into metal plate members E to secure the metal plate members E together (see FIG. 7).
In general, a titanium alloy fastener in accordance with the present invention comprises a fastener body 1 made of titanium alloy subject to a predetermined design and hardened through a heat treatment, and a titanium nitride coating 11 that is formed on the surface of the fastener body 1 through a nitrogen treatment. The titanium alloy fastener has hard, tough, fatigue-limited, lightweight, acid and alkali proof, rustproof and carbon-free material properties.
The hardness of the titanium nitride coating 11 is around 2000HV to 3500HV. Therefore, a titanium alloy fastener in accordance with the present invention effectively eliminates fragility, rust and corrosion problems of the conventional designs.
Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing 00 from the spirit and scope of the invention. Accordingly, the c-i invention is not to be limited except as by the appended claims.
00
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IN
00 0O
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Claims (3)
- 2. The titanium alloy fastener as claimed in claim 1, 00 wherein said titanium nitride coating has a hardness around 2000HV to 3500HV.
- 3. The titanium alloy fastener as claimed in claim 2, which is a screw.
- 4. The titanium alloy fastener as claimed in claim 2, which is a screw nut. The titanium alloy fastener as claimed in claim 2, which is a rivet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2008100629A AU2008100629A4 (en) | 2008-07-08 | 2008-07-08 | Titanium alloy fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2008100629A AU2008100629A4 (en) | 2008-07-08 | 2008-07-08 | Titanium alloy fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2008100629A4 true AU2008100629A4 (en) | 2008-08-14 |
Family
ID=39731344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2008100629A Ceased AU2008100629A4 (en) | 2008-07-08 | 2008-07-08 | Titanium alloy fastener |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU2008100629A4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2541079A1 (en) * | 2011-06-28 | 2013-01-02 | Rolls-Royce plc | A coated fastener |
-
2008
- 2008-07-08 AU AU2008100629A patent/AU2008100629A4/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2541079A1 (en) * | 2011-06-28 | 2013-01-02 | Rolls-Royce plc | A coated fastener |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGI | Letters patent sealed or granted (innovation patent) | ||
| MK21 | Patent ceased section 101c(b)/section 143a(c)/reg. 9a.4 - examination under section 101b had not been carried out within the period prescribed |