JP2005273891A - High strength bolt made of high strength magnesium alloy material manufactured by warm working - Google Patents
High strength bolt made of high strength magnesium alloy material manufactured by warm working Download PDFInfo
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- JP2005273891A JP2005273891A JP2004123503A JP2004123503A JP2005273891A JP 2005273891 A JP2005273891 A JP 2005273891A JP 2004123503 A JP2004123503 A JP 2004123503A JP 2004123503 A JP2004123503 A JP 2004123503A JP 2005273891 A JP2005273891 A JP 2005273891A
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Abstract
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本発明はせん断変形加工、押出加工、圧延加工などの温間加工により創製した高強度を有したマグネシウム合金材料を素材として温間加工で製造した高強度ボルトに関する。ここで、使用する金属材料は、マグネシウムおよびマグネシウム合金である。 The present invention relates to a high-strength bolt manufactured by warm processing using a magnesium alloy material having high strength created by warm processing such as shear deformation processing, extrusion processing, and rolling processing. Here, the metal material to be used is magnesium and a magnesium alloy.
従来、マグネシウム、マグネシウム合金材料は室温で加工できないので塑性変形を加えて加工硬化により強度を増加させることはできなかった。そのため再結晶温度以上の温度の熱間加工により塑性加工することしかできないため、強度の高い材料を得ることができないため、これまでボルト材料として用いることができなかった。将来的には製品の軽量化のためには、ボルト部品においても軽量化が必要であり、これまで用いることができなかったマグネシウム、マグネシウム合金材料を高強度化して用いることが必要となった。
本発明は、環境対応の軽量化のため、マグネシウム、マグネシウム合金材料を温間加工により創製した高強度を有したマグネシウム材料を素材として温間加工で製造した高強度ボルトを提供することを目的としている。Conventionally, since magnesium and magnesium alloy materials cannot be processed at room temperature, it was impossible to increase the strength by work hardening by applying plastic deformation. Therefore, since only plastic working can be performed by hot working at a temperature equal to or higher than the recrystallization temperature, a high-strength material cannot be obtained, and so far it has not been used as a bolt material. In the future, in order to reduce the weight of products, it is necessary to reduce the weight of bolt parts as well, and it has become necessary to increase the strength of magnesium and magnesium alloy materials that could not be used so far.
It is an object of the present invention to provide a high-strength bolt manufactured by warm working using a magnesium material having high strength made of magnesium and a magnesium alloy material by warm working for lightening the environment. Yes.
上記の目的を達成するための、本発明においては、以下の検証を行った。寸法１０×１０×３０ｍｍのＡＺ３１のマグネシウム合金の試験片を押出し比５で１００℃、１５０℃および２００℃で温間押出しを行った。その加工後のマグネシウム合金の引張強さは１００℃で押出し加工した４３７ＭＰａ、１５０℃で３７１ＭＰａ、２００℃２９９ＭＰａと加工前の熱間押出し材の２５２ＭＰａに比べて、大きく引張強さが増加し、高強度のマグネシウム材料が得られた。図１に各温度で押出し加工後の材料を引張試験を行った際の応力−ひずみ関係を示す。１５０℃および２００℃の温間域で押出した材料は１０％を越える一様伸びを有し、その延性を有した高強度のマグネシウム合金を温間域でボルト加工することにより高強度を有したマグネシウム合金材料を素材として高強度ボルトを製造することが可能であることを確認した。
以上の結果は、温間加工により創製した高強度マグネシウム合金材料を素材として温間加工で製造した高強度ボルトを提案できることを示した。In order to achieve the above object, the following verification was performed in the present invention. AZ31 magnesium alloy specimens having dimensions of 10 × 10 × 30 mm were warm extruded at 100 ° C., 150 ° C. and 200 ° C. at an extrusion ratio of 5. The tensile strength of the magnesium alloy after the processing is 437 MPa extruded at 100 ° C., 371 MPa at 150 ° C., 299 MPa at 200 ° C. A strong magnesium material was obtained. FIG. 1 shows the stress-strain relationship when the material after extrusion processing at each temperature is subjected to a tensile test. The material extruded in the warm range of 150 ° C. and 200 ° C. has a uniform elongation exceeding 10%, and has high strength by bolting a high strength magnesium alloy having the ductility in the warm range. It was confirmed that high-strength bolts can be manufactured using magnesium alloy materials.
The above results showed that a high-strength bolt manufactured by warm working using a high-strength magnesium alloy material created by warm working can be proposed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004123503A JP2005273891A (en) | 2004-03-24 | 2004-03-24 | High strength bolt made of high strength magnesium alloy material manufactured by warm working |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004123503A JP2005273891A (en) | 2004-03-24 | 2004-03-24 | High strength bolt made of high strength magnesium alloy material manufactured by warm working |
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| Publication Number | Publication Date |
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| JP2005273891A true JP2005273891A (en) | 2005-10-06 |
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| JP2004123503A Pending JP2005273891A (en) | 2004-03-24 | 2004-03-24 | High strength bolt made of high strength magnesium alloy material manufactured by warm working |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101892445A (en) * | 2010-07-07 | 2010-11-24 | 中南大学 | Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation |
| US20120070248A1 (en) * | 2009-05-29 | 2012-03-22 | Sumitomo Electric Industries, Ltd. | Linear object, bolt, nut and washer each comprising magnesium alloy |
| CN102766832A (en) * | 2012-07-02 | 2012-11-07 | 太原理工大学 | Bidirectional reciprocating extrusion strengthening method for magnesium alloy blocks |
-
2004
- 2004-03-24 JP JP2004123503A patent/JP2005273891A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120070248A1 (en) * | 2009-05-29 | 2012-03-22 | Sumitomo Electric Industries, Ltd. | Linear object, bolt, nut and washer each comprising magnesium alloy |
| CN101892445A (en) * | 2010-07-07 | 2010-11-24 | 中南大学 | Method for preparing magnesium alloy bar with superhigh intensity by powerful deformation |
| CN102766832A (en) * | 2012-07-02 | 2012-11-07 | 太原理工大学 | Bidirectional reciprocating extrusion strengthening method for magnesium alloy blocks |
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