JPH0192337A - Free cutting aluminum alloy for hot forging - Google Patents
Free cutting aluminum alloy for hot forgingInfo
- Publication number
- JPH0192337A JPH0192337A JP24893087A JP24893087A JPH0192337A JP H0192337 A JPH0192337 A JP H0192337A JP 24893087 A JP24893087 A JP 24893087A JP 24893087 A JP24893087 A JP 24893087A JP H0192337 A JPH0192337 A JP H0192337A
- Authority
- JP
- Japan
- Prior art keywords
- hot forging
- aluminum alloy
- alloy
- free
- content
- 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.)
- Pending
Links
- 238000005242 forging Methods 0.000 title claims abstract description 20
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 19
- 238000005520 cutting process Methods 0.000 title claims description 18
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 abstract description 5
- 229910052745 lead Inorganic materials 0.000 abstract description 5
- 230000032683 aging Effects 0.000 abstract description 4
- 229910045601 alloy Inorganic materials 0.000 abstract description 4
- 239000000956 alloy Substances 0.000 abstract description 4
- 229910052797 bismuth Inorganic materials 0.000 abstract description 4
- 229910052718 tin Inorganic materials 0.000 abstract description 4
- 229910052725 zinc Inorganic materials 0.000 abstract description 4
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 229910052749 magnesium Inorganic materials 0.000 abstract description 3
- 229910052726 zirconium Inorganic materials 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 229910018182 Al—Cu Inorganic materials 0.000 description 3
- 230000003679 aging effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- PCTMTFRHKVHKIS-BMFZQQSSSA-N (1s,3r,4e,6e,8e,10e,12e,14e,16e,18s,19r,20r,21s,25r,27r,30r,31r,33s,35r,37s,38r)-3-[(2r,3s,4s,5s,6r)-4-amino-3,5-dihydroxy-6-methyloxan-2-yl]oxy-19,25,27,30,31,33,35,37-octahydroxy-18,20,21-trimethyl-23-oxo-22,39-dioxabicyclo[33.3.1]nonatriaconta-4,6,8,10 Chemical compound C1C=C2C[C@@H](OS(O)(=O)=O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2.O[C@H]1[C@@H](N)[C@H](O)[C@@H](C)O[C@H]1O[C@H]1/C=C/C=C/C=C/C=C/C=C/C=C/C=C/[C@H](C)[C@@H](O)[C@@H](C)[C@H](C)OC(=O)C[C@H](O)C[C@H](O)CC[C@@H](O)[C@H](O)C[C@H](O)C[C@](O)(C[C@H](O)[C@H]2C(O)=O)O[C@H]2C1 PCTMTFRHKVHKIS-BMFZQQSSSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Forging (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は熱間鍛造用快削アルミニウム合金に関し、さら
に詳しくは、溶体化処理性および切削性に優れた熱間鍛
造用快削アルミニウム合金に関するものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a free-cutting aluminum alloy for hot forging, and more particularly to a free-cutting aluminum alloy for hot forging that has excellent solution heat treatability and machinability. It is something.
［従来技術］
一般に、高強度を必要とする熱間鍛造品には熱処理型ア
ルミニウム合金が使用され、特に、快削性が要求される
アルミニウム合金には、Ａｌ−Ｃｕ系合金にＰｂ、Ｂｉ
の低融点金属を含有させたアルミニウム合金が使用され
ている。[Prior Art] Generally, heat-treated aluminum alloys are used for hot forged products that require high strength. In particular, aluminum alloys that require free machinability include Al-Cu alloys containing Pb and Bi.
Aluminum alloys containing low melting point metals are used.
そして、最近では熱処理コストを低減するために焼入れ
前の加熱や時効処理を行なうことなく高強度が得られる
快削材料が要望されている。Recently, in order to reduce heat treatment costs, there has been a demand for free-cutting materials that can obtain high strength without heating or aging treatment before quenching.
しかし、このＡｌ−Ｃｕ系の熱間鍛造用快削アルミニウ
ム合金は、常温時効性が不充分であるため、熱間鍛造後
、加熱→水冷−時効（加熱）の工程を行なわなければ、
充分な強度と快削性を得ることかできない。However, this Al-Cu-based free-cutting aluminum alloy for hot forging has insufficient room-temperature aging properties, so if the process of heating → water cooling and aging (heating) is not performed after hot forging,
It is impossible to obtain sufficient strength and free machinability.
従って、熱間鍛造用であり、快削性を有し、かつ、焼入
れ性と常温時効性にも優れたアルミニウム合金が望まれ
ている。Therefore, there is a demand for an aluminum alloy that is suitable for hot forging, has free machinability, and has excellent hardenability and room temperature aging properties.
［発明が解決しようとする問題点コ
本発明は上記に説明したような従来のＡｌ−Ｃｕ系合金
では熱間鍛造後の熱処理を行なわなければ高強度が得ら
れないという問題点に鑑み、本発明者が鋭意研究を行な
い、検討を重ねた結果、熱間鍛造における熱を利用した
熱処理によって、高強度を得ることができ、さらに、快
削性にも優れた熱間鍛造用快削アルミニウム合金を開発
したのである。[Problems to be Solved by the Invention] The present invention has been developed in view of the problem that high strength cannot be obtained with conventional Al-Cu alloys as explained above unless heat treatment is performed after hot forging. As a result of intensive research and repeated consideration by the inventor, a free-cutting aluminum alloy for hot forging has been developed that can obtain high strength through heat treatment using heat during hot forging, and also has excellent free-cutting properties. was developed.
［問題点を解決するだめの手段］
本発明の熱間鍛造用快削アルミニウム合金の特徴とする
ところは、
Ｍｇ ０．５〜２ｗｔ％、Ｚｎ ３〜７ｗｔ％、Ｃｕ
１．０〜３．０ｗｔ％、Ｚｒ ０．０５〜ＯＪｗｔ％を
含有し、さらに、
Ｐｂ ０．２〜２．０ｗｔ％、Ｂ ｉ ０．２〜２．０
ｗｔ％、Ｓｎ ０．２〜１．０ｗｔ％
の内から選んだ２種または３種
を含有し、残部Ａ１および不可避不純物からなることに
ある。[Means to Solve the Problems] The features of the free-cutting aluminum alloy for hot forging of the present invention are as follows: Mg 0.5-2 wt%, Zn 3-7 wt%, Cu
Contains 1.0 to 3.0 wt%, Zr 0.05 to OJwt%, and further contains Pb 0.2 to 2.0 wt%, B i 0.2 to 2.0
wt%, Sn 0.2 to 1.0 wt%, and the remainder consists of A1 and unavoidable impurities.
本発明に係る熱間鍛造用快削アルミニウム合金について
、以下詳細に説明する。The free-cutting aluminum alloy for hot forging according to the present invention will be described in detail below.
先ず、本発明に係る熱間鍛造用快削アルミニウム合金の
含有成分および含有割合について説明すＭｇ、 ７．ｎ
は同時に含有させることによって、ＭｇＺｎ、の析出硬
化により強度が得られ、Ｍｇ含有量が０．５ｗｔ％未満
ではこのような効果は少なく、また、２ｗｔ％を越えて
含有されると切屑の分断性を阻害し、さらに、Ｚｎ含有
量が３ｗｔ％未満では効果は少なく、また、７ｗｔ％を
越えて含有されると耐蝕性を阻害する。よって、Ｍｇ含
有量は０．５〜２ｗｔ％とし、Ｚｎ含有量は３〜７ｖｔ
％とする。First, the components and content ratios of the free-cutting aluminum alloy for hot forging according to the present invention will be explained.7. n
By simultaneously containing Mg and Zn, strength can be obtained through precipitation hardening. If the Mg content is less than 0.5 wt%, this effect will be small, and if it is contained in more than 2 wt%, the chip breaking property will be reduced. Moreover, if the Zn content is less than 3 wt%, the effect will be small, and if it is contained in excess of 7 wt%, the corrosion resistance will be inhibited. Therefore, the Mg content should be 0.5 to 2 wt%, and the Zn content should be 3 to 7 vt.
%.
Ｃｕは穴明は切削時に生じるパリに対し、抑制する効果
を有し、含有量が１．０ｗｔ％未満ではこの効果が少な
く、また、３．０ｗｔ％を越えて含有されると焼入れ性
を著しく劣化させる。よって、Ｃｕ含有量は１．０〜３
．０ｗｔ％とする。Cu has the effect of suppressing the cracks that occur during drilling, and if the content is less than 1.0 wt%, this effect will be small, and if it is contained in more than 3.0 wt%, it will significantly impair hardenability. deteriorate. Therefore, the Cu content is 1.0 to 3
．． It is set to 0wt%.
一般に、遷移元素は焼入れ性を阻害するのであるが、こ
の遷移元素の中でもＺｒは比較的焼入れ感受性を上げる
ことなく強度が得られる元素であり、Ｚｒ含有量が０．
０５ｗｔ％未満では強度に対して効果は少なく、また、
０Ｊｖｔ％を越えて含有されると鍛造性を阻害する。よ
って、Ｚｒ含有量は０．０５〜１．０ｗｔ％とする。In general, transition elements inhibit hardenability, but among these transition elements, Zr is an element that can provide strength without increasing susceptibility to hardening.
If it is less than 0.05 wt%, it has little effect on strength, and
If the content exceeds 0 Jvt%, forgeability will be inhibited. Therefore, the Zr content is set to 0.05 to 1.0 wt%.
切削性、特に切屑の分断性を改善するために、Ｐｂ、Ｂ
１５Ｓｎを含有させるのであるが、Ｐｂ。To improve machinability, especially chip breakup, Pb, B
15Sn is contained, but Pb.
Ｂｉの含有量が０．２ｗｔ％未満では含有効果は少なく
、また、２．０ｗｔ％を越えて含有されると耐蝕性を阻
害する。よって、Ｐｂ含有量は０．２〜２．０ｗｔ％、
Ｂｉ含有量は０．２〜２．０ｗｔ％とする。If the Bi content is less than 0.2 wt%, the effect of the inclusion is small, and if the Bi content exceeds 2.0 wt%, corrosion resistance will be impaired. Therefore, the Pb content is 0.2 to 2.0 wt%,
The Bi content is 0.2 to 2.0 wt%.
また、Ｓｎは含有量か０．２ｗｔ％未満では切屑分断性
のには効果は少なく、また、１．０ｗｔ％を越えて含有
されると熱間加工割れの原因となる。よって、Ｓｎ含有
量は０．２〜１．０ｗｔ％とする。Further, if the content of Sn is less than 0.2 wt%, it will have little effect on chip separation, and if the content exceeds 1.0 wt%, it will cause hot working cracking. Therefore, the Sn content is set to 0.2 to 1.0 wt%.
その他、不純物としての５ｔＳＦｅ、Ｍｎ、Ｃｒ。In addition, 5tSFe, Mn, and Cr as impurities.
Ｔｉはそれぞれ０．１ｗｔ％以下で、かつ、総量で０．
３ｗｔ％以下であれば、焼入れ性を阻害することがない
ので、上記の範囲において許容することができる。Ti is 0.1 wt% or less, and the total amount is 0.1 wt% or less.
If it is 3 wt% or less, the hardenability will not be inhibited, so it can be tolerated within the above range.
上記の含有成分および含有割合のアルミニウム合金を熱
間鍛造後の冷却工程で３５０℃の温度から１００℃／ｓ
ｉｎ以上の冷却条件で、その後の常温時効により強度を
得るために充分な焼入れを行うことができる。The aluminum alloy with the above content and content ratio is heated at 100°C/s from a temperature of 350°C in the cooling process after hot forging.
Under cooling conditions of in or more, sufficient quenching can be performed to obtain strength through subsequent room temperature aging.
［実 施 例コ
次に、本発明に係る熱間鍛造用快削アルミニウム合金の
実施例を説明する。[Example] Next, an example of a free-cutting aluminum alloy for hot forging according to the present invention will be described.
実施例
第１表に示す含有成分および含有割合のアルミニウム合
金を通常の方法により溶解し、次いで、１５０φのビレ
ットを作成して直接押出法により３０φの丸棒に押出し
た。EXAMPLE An aluminum alloy having the components and proportions shown in Table 1 was melted by a conventional method, and then a 150φ billet was prepared and extruded into a 30φ round bar by a direct extrusion method.
この丸棒を第１表の条件で熱間鍛造を想定した熱処理を
行ない、サンプルを作成した。This round bar was subjected to heat treatment assuming hot forging under the conditions shown in Table 1 to prepare a sample.
このサンプルを用いて強度および切屑分断性を調査した
。Using this sample, strength and chip breakability were investigated.
第１表にその結果を示す。Table 1 shows the results.
切削条件
送り ０．３龍／ｒｅｖ切削速度
２００ｍ
切込み １ＩＩｌｆｆｉ工具
ＫＩＯ超硬ロー付はバイト
ノーズＲ０．３Ｒ
横掬い角 １５゜
切屑の分断性の評価は第１図に示すように、第１図（ａ
）がＡ、第１図（ｂ）がＢ、第１図（ｃ）が０１第１図
（ｄ）ｈ＜Ｄ、第１図Ｃｅ）がＥの５段階で行なった。Cutting conditions Feed: 0.3 dragons/rev Cutting speed: 200 m Depth of cut: 1IIlffi tool KIO carbide brazed tool has bite nose R0.3R Horizontal rake angle: 15° The chip breakability is evaluated as shown in Fig. 1 ( a
) was performed in five stages: A for FIG. 1(b), B for FIG. 1(c), 01 for FIG. 1(d), and E for FIG. 1(d).
ＡＢＣＤ Ｅ
良−一−−−−−不良
また、穴明けのパリ性を見るために、エンドミル切削を
行って切削後のパリについて評価した。ABCD E Good - Good - Bad In addition, in order to check the crispness of the hole, cutting with an end mill was performed and the crispness after cutting was evaluated.
エンドミル穴明は条件
エンドミル径 ８關φ
ねじり角 １７０゜
切削速度 １５０ ｒｐｍ送り
７ ／ １００ ｒｎｍ／ ｒｅｖ第１表
にその結果を示す。End mill hole drilling conditions: End mill diameter: 8 mm φ Helix angle: 170° Cutting speed: 150 rpm feed
7/100 rnm/rev Table 1 shows the results.
［発明の効果コ
以上説明したように、本発明に係る熱間鍛造用快削アル
ミニウム合金は上記の構成であるから、熱間鍛造時の熱
を利用して焼入れを行なうことができるので、溶体化処
理工程を省略することが可能となり、さらに、優れた切
削性を有するという効果がある。[Effects of the Invention] As explained above, since the free-cutting aluminum alloy for hot forging according to the present invention has the above-mentioned structure, it can be hardened using the heat during hot forging. It is possible to omit the chemical treatment step, and furthermore, it has the effect of having excellent machinability.
第１図は切屑を評価するための図である。 特許出願人 株式会社 神戸製鋼所 矛１ｓ （α）（ｂ） 勿 η （（ｊ ’ （ｃｔ）矛１ 図 （４！ン FIG. 1 is a diagram for evaluating chips. Patent applicant: Kobe Steel, Ltd. spear 1s (α) (b) Of course η ((j (4!n
Claims (1)
〜３．０ｗｔ％、Ｚｒ０．０５〜０．３ｗｔ％を含有し
、さらに、 Ｐｂ０．２〜２．０ｗｔ％、Ｂｉ０．２〜２．０ｗｔ％
、Ｓｎ０．２〜１．０ｗｔ％ の内から選んだ２種または３種 を含有し、残部Ａｌおよび不可避不純物からなることを
特徴とする熱間鍛造用快削アルミニウム合金。[Claims] Mg0.5-2wt%, Zn3-7wt%, Cu1.0
-3.0wt%, Zr0.05-0.3wt%, and further contains Pb0.2-2.0wt%, Bi0.2-2.0wt%
A free-cutting aluminum alloy for hot forging, characterized in that it contains two or three selected from the group consisting of 0.2 to 1.0 wt% of Sn, and the remainder consists of Al and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24893087A JPH0192337A (en) | 1987-10-01 | 1987-10-01 | Free cutting aluminum alloy for hot forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24893087A JPH0192337A (en) | 1987-10-01 | 1987-10-01 | Free cutting aluminum alloy for hot forging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0192337A true JPH0192337A (en) | 1989-04-11 |
Family
ID=17185531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24893087A Pending JPH0192337A (en) | 1987-10-01 | 1987-10-01 | Free cutting aluminum alloy for hot forging |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0192337A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111286649A (en) * | 2020-03-25 | 2020-06-16 | 广东省工业分析检测中心 | High-strength heat-resistant lead-free-cutting aluminum alloy and preparation method thereof |
-
1987
- 1987-10-01 JP JP24893087A patent/JPH0192337A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111286649A (en) * | 2020-03-25 | 2020-06-16 | 广东省工业分析检测中心 | High-strength heat-resistant lead-free-cutting aluminum alloy and preparation method thereof |
| CN111286649B (en) * | 2020-03-25 | 2021-09-03 | 广东省科学院工业分析检测中心 | High-strength heat-resistant lead-free-cutting aluminum alloy and preparation method thereof |
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