JPS62274048A - Free-cutting steel - Google Patents
Free-cutting steelInfo
- Publication number
- JPS62274048A JPS62274048A JP11474986A JP11474986A JPS62274048A JP S62274048 A JPS62274048 A JP S62274048A JP 11474986 A JP11474986 A JP 11474986A JP 11474986 A JP11474986 A JP 11474986A JP S62274048 A JPS62274048 A JP S62274048A
- Authority
- JP
- Japan
- Prior art keywords
- free
- steel
- cutting
- cutting steel
- machinability
- 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.)
- Granted
Links
- 229910000915 Free machining steel Inorganic materials 0.000 title claims abstract description 22
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 8
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 7
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 7
- 229910052718 tin Inorganic materials 0.000 claims abstract description 7
- 229910052742 iron Inorganic materials 0.000 claims abstract description 6
- 229910052717 sulfur Inorganic materials 0.000 claims description 11
- 239000012535 impurity Substances 0.000 claims description 8
- 229910052745 lead Inorganic materials 0.000 claims description 8
- 229910052714 tellurium Inorganic materials 0.000 claims description 8
- 229910052711 selenium Inorganic materials 0.000 claims description 7
- 229910052716 thallium Inorganic materials 0.000 claims description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims 2
- 229910002092 carbon dioxide Inorganic materials 0.000 claims 1
- 239000001569 carbon dioxide Substances 0.000 claims 1
- 229910052698 phosphorus Inorganic materials 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 21
- 239000010959 steel Substances 0.000 abstract description 21
- 239000000463 material Substances 0.000 abstract description 5
- 239000000203 mixture Substances 0.000 abstract description 5
- 229910001369 Brass Inorganic materials 0.000 abstract description 3
- 239000010951 brass Substances 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 210000002445 nipple Anatomy 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Landscapes
- Cutting Tools, Boring Holders, And Turrets (AREA)
- Heat Treatment Of Steel (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
［発明の目的コ
（産業上の利用分野）
この発明は、被削性に優れた快削鋼に関し、例えば、時
計部品、電話、ラジオ、ステレオ、テレビなどの電気通
信機器用部品、コンピュータなどの精密機械用部品、各
種つまみ、スポークニップル、グリースニップルなどの
自動車自転車部品、その他黄銅代替部品などの素材とし
て利用される被削性に優れた快削鋼に関するものである
。[Detailed Description of the Invention] 3. Detailed Description of the Invention [Purpose of the Invention (Industrial Field of Application) This invention relates to free-cutting steel with excellent machinability, such as watch parts, telephones, radios, etc. It has excellent machinability and is used as a material for parts for telecommunication equipment such as stereos and televisions, parts for precision machinery such as computers, automobile and bicycle parts such as various knobs, spoke nipples, and grease nipples, and other brass substitute parts. It concerns free-cutting steel.
（従来の技術）
従来、上記に例示した用途に利用される快削鋼としては
、ＪＩＳ ＳＵＭＩＩ〜４３として制定されているい
おうおよびいおう複合快削鋼鋼材のほか、ｐ、ｓ、ｐｂ
を複合添加した快削鋼（例えば、大同特殊鋼（株）規格
： ５ＦＣ２Ｆ 。(Prior Art) Conventionally, free-cutting steels used for the above-mentioned applications include sulfur and sulfur composite free-cutting steels, which are established as JIS SUMII~43, as well as p, s, and pb.
Free-cutting steel with composite additives (for example, Daido Steel Co., Ltd. standard: 5FC2F).
３Ｆ、４Ｆ）や、Ｓ、Ｐｂ、Ｔｅを複合添加した快削鋼
（例えば、大同特殊鋼（株）規格：５ＦＣ３ＦＴ）など
がある。3F, 4F), and free-cutting steel with composite additions of S, Pb, and Te (for example, Daido Steel Co., Ltd. standard: 5FC3FT).
（発明が解決しようとする問題点）
従来の快削鋼は上記のように１幅広い分野において適用
され、被削性に優れているため、ドリル等の切削工具の
寿命を大幅に向上させることができるという著しく優れ
た特長を有している。そして、切削部品の用途および形
状ならびに要求コストによっては上記に例示した以外の
成分組成からなる快削鋼が望まれることもあった。(Problems to be solved by the invention) Conventional free-cutting steels are used in a wide range of fields as mentioned above, and have excellent machinability, so they can significantly improve the life of cutting tools such as drills. It has the outstanding feature of being able to Depending on the intended use, shape, and required cost of the cutting part, a free-cutting steel having a composition other than those exemplified above may be desired.
（発明の目的）
この発明は、上記した従来の要望に着目してなされたも
ので、従来既知の成分以外であっても被削性に優れた快
削鋼を提供することを目的としているものである。(Purpose of the Invention) This invention was made in view of the above-mentioned conventional demands, and its purpose is to provide a free-cutting steel that has excellent machinability even with ingredients other than those known to date. It is.
［発明の構成］
（問題点を解決するための手段）
この発明による快削鋼は、重量％で、Ｃ：０．０５〜０
．５％、Ｓｉ：０．５％以下、Ｍｎ：１．５％以下、Ｓ
ｎ：０．０１〜１．０％を含み、必要に応じてＳｂ：０
．０１〜１．０％。[Structure of the invention] (Means for solving the problems) The free-cutting steel according to the present invention has a C: 0.05 to 0 in weight%.
．． 5%, Si: 0.5% or less, Mn: 1.5% or less, S
Contains n: 0.01 to 1.0%, Sb: 0 as necessary
．． 01-1.0%.
Ａｓ：０．０１〜１．０％のうちの１種または２種を含
み、同じく必要に応じて、Ｂｉ、Ｃａ。Contains one or two of As: 0.01 to 1.0%, and Bi and Ca as necessary.
Ｐｂ 、 Ｓ 、 Ｓｅ 、Ｔｅ 、Ｔｌ（１）うちの
１種または２種以上を合計で０．０１〜０．５％含有し
、残部Ｆｅおよび不純物からなることを特徴としている
。It is characterized in that it contains one or more of Pb, S, Se, Te, and Tl (1) in a total amount of 0.01 to 0.5%, with the balance consisting of Fe and impurities.
次に、この発明による被削性に優れた快削鋼の成分範囲
（重量％〕の限定理由について説明する。Next, the reason for limiting the composition range (weight %) of the free-cutting steel with excellent machinability according to the present invention will be explained.
Ｃ：０．０５〜０．５％
Ｃは時計部品、精密機械用部品、電気通信機器用部品等
の各種部品の機械的強度を確保するうえで必要な元素で
あり、そのためには０．０５％以上含有させる。しかし
、多量に含有すると硬さが増大して被削性を低下させる
ので、その上限を０．５％とする。C: 0.05-0.5% C is an element necessary to ensure the mechanical strength of various parts such as watch parts, precision machinery parts, and telecommunication equipment parts. % or more. However, if it is contained in a large amount, hardness increases and machinability decreases, so the upper limit is set at 0.5%.
Ｓｉ：０．５％以下
Ｓｉは鋼の溶製時に脱酸剤として作用する元素であるが
、多量に含有すると被削性を低下させるので、その上限
を０．５％とする。Si: 0.5% or less Si is an element that acts as a deoxidizing agent during steel melting, but if it is contained in a large amount, machinability is reduced, so the upper limit is set to 0.5%.
Ｍｎ：１．５％以下
Ｍｎは鋼の溶製時に脱酸剤および脱硫剤として作用する
元素であるが、多量に含有すると被削性ル（ｔｆ Ｔ七
赫ス＋訊 エめ１囮九ＩＥＯＩし＋る。Mn: 1.5% or less Mn is an element that acts as a deoxidizing agent and desulfurizing agent during steel melting, but if it is present in large amounts, machinability (tf I'll do it.
Ｓｎ：０．０１〜１．０％
Ｓｎは各種部品の素材として用いられる鋼の被削性を向
上させて工具の寿命を延長させるとともに、部品の表面
仕上性を良好なものとするのに有効な元素であり、この
ような効果を得るために０．０１％以上含有させた。し
かし、多量に含有すると鋼の熱間加工性を害するため、
その上限を１．０％とする。Sn: 0.01-1.0% Sn is effective in improving the machinability of steel used as a material for various parts, extending the life of tools, and improving the surface finish of parts. In order to obtain such an effect, it is contained in an amount of 0.01% or more. However, if it is contained in large amounts, it will impair the hot workability of steel.
The upper limit is set at 1.0%.
Ｓｂ：０．０１〜１．０％
Ａｓ：０．０１〜１．０％
ｓｂ、ａｓは前記Ｓｎと複合添加することによって、鋼
の被削性をより一層向上させるのに有効な元素であり、
このような効果を得るために各々０．０１％以上含有さ
せることも良い、しかし、多量に含有すると鋼の熱間加
工性および靭性を害するので、添加するとしてもその上
限を各々１．０％以下とするのが良い。Sb: 0.01-1.0% As: 0.01-1.0% sb and as are effective elements for further improving the machinability of steel by adding them in combination with Sn. ,
In order to obtain such effects, it is good to contain 0.01% or more of each of them, but if they are added in large amounts, they will impair the hot workability and toughness of the steel, so even if they are added, the upper limit should be 1.0% of each. It is best to set it to the following.
Ｂｉ、Ｃａ、Ｐｂ、Ｓ、Ｓｅ、Ｔｅ、ＴＪＩ： １種ま
たは２種以上を合計で０．０１〜０．５％Ｂｉ、Ｃａ、
Ｐｂ、Ｓ、Ｓｅ、Ｔｅ、ＴＪＩはいずれも鋼の被削性を
改善するのに有効な元素であり、上記被削性向上元素で
あるＳｎと複合添加することによって各種部品の素材と
して利用される鋼の被削性をさらに改善するのに有効で
ある。しかし、多すぎると鋼の製造性や靭性を害するの
で、これらの各元素の合計で０．０１〜０．５％の範囲
とするのがよい。そして、被削性向上元素としてＳを含
有させる場合には、Ｓ含有量を０．２〜０．４％の範囲
で添加し、熱間加工性を改善したいときにはＭ ｎ ／
Ｓが３以上であるように成分調整することが必要に応
じて望ましく、Ｓを含有させない場合には不純物元素と
して０．０１５％以下にしておくことがより望ましい。Bi, Ca, Pb, S, Se, Te, TJI: One or more types in total 0.01 to 0.5% Bi, Ca,
Pb, S, Se, Te, and TJI are all elements that are effective in improving the machinability of steel, and can be used as materials for various parts by adding them in combination with Sn, which is an element that improves machinability. This is effective in further improving the machinability of steel. However, since too much content impairs the manufacturability and toughness of steel, the total content of each of these elements is preferably in the range of 0.01 to 0.5%. When S is added as an element for improving machinability, the S content is added in the range of 0.2 to 0.4%, and when it is desired to improve hot workability, M n /
It is desirable to adjust the composition as necessary so that S is 3 or more, and when S is not contained, it is more desirable to keep the content as an impurity element to 0.015% or less.
そのほか、鋼の被削性を向上させるために、Ｐを０．０
４〜０，０９％の範囲で添加するのもよく、Ｏ含有量が
２００〜５００ｐｐｍの範囲となるようにすることも必
要に応じて望ましい。In addition, in order to improve the machinability of steel, P is set to 0.0.
It may be added in a range of 4 to 0.09%, and it is desirable that the O content be in a range of 200 to 500 ppm, if necessary.
（実施例〕
第１表に示す成分の鋼をそれぞれ５０ｋｇ誘導炉で溶製
したのち造塊し、分塊圧延および製品圧延したあと切削
試験片を採取して、第２表に示す条件の切削試験に供し
た。この切削試験においては、切削速度Ｖ＝５０ｍ／ｍ
ｉｎでのドリル寿命を調べた。この結果を同じく第１表
に示す。(Example) 50 kg of each steel having the composition shown in Table 1 was melted in an induction furnace, then ingot formed, and after blooming and product rolling, cutting test pieces were taken and cutting under the conditions shown in Table 2 was performed. In this cutting test, the cutting speed V = 50 m/m
The lifespan of the drill was investigated. The results are also shown in Table 1.
第 ２ 表
第１表に示すように、基本成分の鋼にＳｎを単独添加し
た本発明鋼Ｎｏ、ｌ、２は、いずれも切削速度５０ｍ／
ｍｉｎでの工具寿命（ドリル寿命）が比較鋼陥、２２に
比べてかなり増大しており。Table 2 As shown in Table 1, inventive steels No., 1, and 2, in which Sn was added alone to the basic component steel, all had a cutting speed of 50 m/min.
The tool life (drill life) at min is considerably increased compared to the comparison steel 22.
本発明鋼は被削性に著しく優れていることが明らかであ
る。また、Ｓｎに加えてＳｂ、Ａｓの１１ａ以上を複合
添加した本発明鋼陽、３〜５では被削性がより一層向上
しており、また、Ｓｎに加えてＢｉ 、Ｃａ、Ｐｂ、Ｓ
、Ｓｅ、Ｔｅ、Ｔｕの１種以上を複合添加した本発明鋼
陥、６〜８においても被削性がより一層向上しており、
Ｓｂ、Ａｓの１種以上とＤｉ 、Ｃａ、Ｐｂ、Ｓ、Ｓｅ
、Ｔｅ。It is clear that the steel of the present invention has extremely excellent machinability. In addition, the machinability of steels 3 to 5 of the present invention, in which 11a or more of Sb and As were added in addition to Sn, was further improved;
, the machinability is further improved in steels of the present invention Nos. 6 to 8 in which one or more of Se, Te, and Tu are added in combination,
One or more of Sb, As and Di, Ca, Pb, S, Se
, Te.
ＴＪＩの１種以上とを複合添加した本発明鋼陽、９では
被剛性がかなり向上していることが明らかである。さら
に、Ｐを適量添加した本発明鋼陥。It is clear that the stiffness of steel according to the present invention, No. 9, in which one or more types of TJI were added in combination, was considerably improved. Furthermore, the steel of the present invention has a suitable amount of P added thereto.
１２および０含有量を適切に調整した本発明鋼Ｎｏ、１
３，１４においても被削性の向上を良好に実現できるこ
とが確認された。Invention steel No. 1 with appropriately adjusted 12 and 0 contents
It was confirmed that improvement in machinability can also be achieved satisfactorily in Nos. 3 and 14.
〔発明の効果１
以上説明してきたように、この発明による快削鋼は、重
量％で、Ｃ：０．０５〜０．５％、Ｓｉ：０．５％以下
、Ｍｎ：１．５％以下、Ｓｎ：０．０１〜１．０％を含
み、必要に応じてＳｂ二〇、０１〜１．０％、Ａｓ：０
．０１〜１．０％のうちの１種または２種を含み、同じ
く必要に応じて、Ｂｉ 、Ｃａ、Ｐｂ、Ｓ、Ｓｅ、Ｔｅ
、Ｔｌのうちの１種または２種以上を合計で０．０１〜
０．５％含有し、残部Ｆｅおよび不純物からなるもので
あることから、被削性に著しく優れたものであり、この
発明による快削鋼を時計部品、電話、ラジオ、ステレオ
、テレビなどの電気通信機器用部品、コンピュータなど
の精密機械用部品。[Effect of the invention 1 As explained above, the free-cutting steel according to the present invention has, in weight percent, C: 0.05 to 0.5%, Si: 0.5% or less, Mn: 1.5% or less. , Sn: 0.01-1.0%, Sb20, 01-1.0%, As: 0 as necessary
．． 01 to 1.0%, and also contains Bi, Ca, Pb, S, Se, Te, if necessary.
, one or more of Tl in total from 0.01 to
Since it contains 0.5% and the balance consists of Fe and impurities, it has extremely excellent machinability, and the free-cutting steel of this invention can be used for watch parts, telephones, radios, stereos, televisions, and other electrical appliances. Parts for communication equipment, parts for precision machinery such as computers.
各種つまみ、スポークニップル、グリースニップルなど
の自動車自転車部品、その他黄銅代替部品等々の素材と
した場合にこれらの切削加工を能率よくかつ高精度で行
うことが可能になり、超硬型や高速度工具型などの工具
の寿命を大幅に延長することが可能であって、寸法精度
の向上、工具コストの減少、工具交換頑度の低減などを
実現することが可能であるという著大なる効果がもたら
される。When used as materials for automobile and bicycle parts such as various knobs, spoke nipples, grease nipples, and other brass substitute parts, these cutting processes can be performed efficiently and with high precision, making it possible to cut carbide molds and high-speed tools. It is possible to significantly extend the life of tools such as molds, and it has the significant effect of improving dimensional accuracy, reducing tool costs, and reducing tool replacement rigidity. It will be done.
Claims (7)
５％以下、Ｍｎ：１．５％以下、Ｓｎ：０．０１〜１．
０％を含み、残部Ｆｅおよび不純物からなることを特徴
とする快削鋼。(1) In weight%, C: 0.05-0.5%, Si: 0.
5% or less, Mn: 1.5% or less, Sn: 0.01-1.
A free-cutting steel characterized by containing 0% Fe and the balance consisting of Fe and impurities.
５％以下、Ｍｎ：１．５％以下、Ｓｎ：０．０１〜１．
０％、およびＳｂ：０．０１〜１．０％、Ａｓ：０．０
１〜１．０％のうちの１種または２種を含み、残部Ｆｅ
および不純物からなることを特徴とする快削鋼。(2) In weight%, C: 0.05-0.5%, Si: 0.
5% or less, Mn: 1.5% or less, Sn: 0.01-1.
0%, and Sb: 0.01-1.0%, As: 0.0
Contains one or two of 1 to 1.0%, the balance being Fe
Free-cutting steel characterized by consisting of and impurities.
５％以下、Ｍｎ：１．５％以下、Ｓｎ：０．０１〜１．
０％、およびＢｉ、Ｃａ、Ｐｂ、Ｓ、Ｓｅ、Ｔｅ、Ｔｌ
のうちの１種または２種以上を合計で０．０１〜０．５
％を含み、残部Ｆｅおよび不純物からなることを特徴と
する快削鋼。(3) In weight%, C: 0.05-0.5%, Si: 0.
5% or less, Mn: 1.5% or less, Sn: 0.01-1.
0%, and Bi, Ca, Pb, S, Se, Te, Tl
A total of 0.01 to 0.5 of one or more of the following
%, with the balance consisting of Fe and impurities.
５％以下、Ｍｎ：１．５％以下、Ｓｎ：０．０１〜１．
０％、およびＳｂ：０．０１〜１．０％、Ａｓ：０．０
１〜１．０％のうちの１種または２種、さらにＢｉ、Ｃ
ａ、Ｐｂ、Ｓ、Ｓｅ、Ｔｅ、Ｔｌのうちの１種または２
種以上を合計で０．０１〜０．５％を含み、残部Ｆｅお
よび不純物からなることを特徴とする快削鋼。(4) In weight%, C: 0.05-0.5%, Si: 0.
5% or less, Mn: 1.5% or less, Sn: 0.01-1.
0%, and Sb: 0.01-1.0%, As: 0.0
One or two of 1 to 1.0%, and further Bi, C
One or two of a, Pb, S, Se, Te, Tl
A free-cutting steel characterized by containing a total of 0.01 to 0.5% of carbon dioxide and more, with the balance consisting of Fe and impurities.
３以上である特許請求の範囲第（３）項または第（４）
項記載の快削鋼。(5) Claim (3) or (4) in which the S content is 0.2 to 0.4% and the Mn/S is 3 or more.
Free-cutting steel as described in section.
する特許請求の範囲第（１）項ないし第（５）項のいず
れかに記載の快削鋼。(6) The free-cutting steel according to any one of claims (1) to (5), containing 0.04 to 0.09% P in the balance Fe.
した特許請求の範囲第（１）項ないし第（６）項のいず
れかに記載の快削鋼。(7) The free-cutting steel according to any one of claims (1) to (6), wherein O: 200 to 500 ppm in impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61114749A JPH076036B2 (en) | 1986-05-21 | 1986-05-21 | Free cutting steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61114749A JPH076036B2 (en) | 1986-05-21 | 1986-05-21 | Free cutting steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62274048A true JPS62274048A (en) | 1987-11-28 |
| JPH076036B2 JPH076036B2 (en) | 1995-01-25 |
Family
ID=14645712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61114749A Expired - Lifetime JPH076036B2 (en) | 1986-05-21 | 1986-05-21 | Free cutting steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH076036B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05279792A (en) * | 1992-03-31 | 1993-10-26 | Nippon Steel Corp | Electric resistance welded steel tube for machine structure excellent in machinability |
| JP2003013188A (en) * | 2001-07-02 | 2003-01-15 | Nippon Steel Corp | Bi FREE-CUTTING STEEL |
| CN105839004A (en) * | 2016-06-03 | 2016-08-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel for thick-specification camion spoke and manufacturing method for steel |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5415525A (en) * | 1977-04-20 | 1979-02-05 | Wavin Bv | Plastic socket pipe member and method of making same |
| JPS552468A (en) * | 1978-06-23 | 1980-01-09 | Yukiko Sakurai | Electrode for temporary myocardium stimulation |
| JPS5684448A (en) * | 1979-12-13 | 1981-07-09 | Kobe Steel Ltd | Low-carbon sn-containing free cutting steel |
-
1986
- 1986-05-21 JP JP61114749A patent/JPH076036B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5415525A (en) * | 1977-04-20 | 1979-02-05 | Wavin Bv | Plastic socket pipe member and method of making same |
| JPS552468A (en) * | 1978-06-23 | 1980-01-09 | Yukiko Sakurai | Electrode for temporary myocardium stimulation |
| JPS5684448A (en) * | 1979-12-13 | 1981-07-09 | Kobe Steel Ltd | Low-carbon sn-containing free cutting steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05279792A (en) * | 1992-03-31 | 1993-10-26 | Nippon Steel Corp | Electric resistance welded steel tube for machine structure excellent in machinability |
| JP2003013188A (en) * | 2001-07-02 | 2003-01-15 | Nippon Steel Corp | Bi FREE-CUTTING STEEL |
| CN105839004A (en) * | 2016-06-03 | 2016-08-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Steel for thick-specification camion spoke and manufacturing method for steel |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH076036B2 (en) | 1995-01-25 |
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