JPH0247242A - Sulfur composite free-cutting steel - Google Patents
Sulfur composite free-cutting steelInfo
- Publication number
- JPH0247242A JPH0247242A JP19859088A JP19859088A JPH0247242A JP H0247242 A JPH0247242 A JP H0247242A JP 19859088 A JP19859088 A JP 19859088A JP 19859088 A JP19859088 A JP 19859088A JP H0247242 A JPH0247242 A JP H0247242A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- cutting
- machinability
- sulfur composite
- composite free
- 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
- 229910052717 sulfur Inorganic materials 0.000 title claims abstract description 18
- 229910000915 Free machining steel Inorganic materials 0.000 title abstract description 18
- 239000002131 composite material Substances 0.000 title abstract description 15
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 title abstract description 14
- 239000011593 sulfur Substances 0.000 title abstract description 14
- 229910052797 bismuth Inorganic materials 0.000 claims abstract description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910052760 oxygen Inorganic materials 0.000 claims abstract 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 32
- 239000010959 steel Substances 0.000 abstract description 32
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 9
- 229910000997 High-speed steel Inorganic materials 0.000 abstract description 6
- 238000009749 continuous casting Methods 0.000 abstract description 5
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 2
- 238000003754 machining Methods 0.000 abstract 3
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 5
- 150000003568 thioethers Chemical class 0.000 description 5
- 238000007792 addition Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000003746 surface roughness Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000744 A-2 tool steel Inorganic materials 0.000 description 2
- 239000010730 cutting oil Substances 0.000 description 2
- 229910000926 A-3 tool steel Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001327 Rimmed steel Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010191 image analysis Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
【発明の詳細な説明】 童呈上至剋■光団 本発明は、硫黄複合快削鋼に関する。[Detailed description of the invention] Children's highest honor ■Koudan The present invention relates to sulfur composite free-cutting steel.
従来■技歪
硫黄複合快削鋼は、Ａ ｌ ％ Ｓ ｓ等の強脱酸元素
を含まないリムド鋼であって、古くより知られている。Conventional technology Strained sulfur composite free-cutting steel is a rimmed steel that does not contain strong deoxidizing elements such as Al % S s and has been known for a long time.
しかし、最近、かかる快削鋼の製造が造塊法から連続鋳
造法に変わりつつあり、このように、連続鋳造法による
ときは、鋼中のＭｎＳが小さくなるため、被削性が低下
する。他方、快削鋼の使用においても、従来、その切削
が自動盤にて高速度鋼工具を用いてなされていたところ
、超硬合金工具による切削が増加しつつあるが、硫黄複
合快削鋼は、かかる超硬合金工具による切削性が必らず
もよくない。However, recently, the production of such free-cutting steel has been changing from the ingot-forming method to the continuous casting method, and when using the continuous casting method, the MnS in the steel becomes smaller, resulting in a decrease in machinability. On the other hand, when using free-cutting steel, cutting was previously done using high-speed steel tools on automatic lathes, but cutting with cemented carbide tools is increasing, but sulfur composite free-cutting steel However, the machinability of such cemented carbide tools is not always good.
■が”しようと る蓋。The lid that ■ tries to do.
本発明者らは、硫黄複合快削鋼における上記した問題を
解決するために鋭意研究した結果、硫黄複合快削鋼を脱
酸し、これを連続鋳造法にて製造するとき、超硬合金工
具による切削性は向上するものの、自動盤にて高速度鋼
工具を用いて切削するとき、その被削性が著しく劣るこ
とを見出した。As a result of intensive research in order to solve the above-mentioned problems in sulfur composite free-cutting steel, the present inventors found that when sulfur composite free-cutting steel is deoxidized and manufactured by continuous casting, cemented carbide tools It has been found that although the machinability is improved by cutting, the machinability is significantly inferior when cutting with a high-speed steel tool on an automatic lathe.
そこで、発明者らは、かかる問題を解決するために、Ｓ
と共にＣａ及びＢｉを複合添加することによって、高速
度鋼工具による切削性をも改善し得ることを見出して、
本発明に至ったものである。Therefore, in order to solve this problem, the inventors
We have discovered that the machinability of high-speed steel tools can also be improved by adding Ca and Bi in combination.
This led to the present invention.
矛 を”° るための
本発明による硫黄複合快削鋼は、重量％でＣ０．６０％
以下、
Ｍｎ ０．３〜２．０％、
Ｐ ０．１２％以下、
Ｓ ０．１２〜０．４０％、
Ａｐ ０．０５０％以下、
Ｓｉ０．５０％以下、
０ ０．０００５〜０．０１％、
Ｃａ ０．００１〜０．０１％、
Ｂｉｏ、０１〜０．３０％、
残部鉄及び不可避的不純物よりなることを特徴とする。The sulfur composite free-cutting steel according to the present invention for cutting steel has a carbon content of 0.60% by weight.
Below, Mn 0.3-2.0%, P 0.12% or less, S 0.12-0.40%, Ap 0.050% or less, Si 0.50% or less, 0 0.0005-0.01 %, Ca 0.001-0.01%, Bio, 01-0.30%, the balance being iron and inevitable impurities.
本発明による硫黄複合快削鋼におけるＣ、Ｍｎ及びＰ量
は、通常の硫黄複合快削鋼が含有する範囲と同じである
。The amounts of C, Mn, and P in the sulfur composite free-cutting steel according to the present invention are the same as those contained in ordinary sulfur composite free-cutting steel.
Ａｌ及びＳｉは、脱酸元素として添加されるが、過多に
添加しても、徒に鋼製造費用を高めるのみであり、特に
、Ｓｉは、硬さを増し、被削性を劣化させるので、添加
量は、Ａ１については０．０５０％以下、Ｓｉについて
は０．５０％以下とする。Al and Si are added as deoxidizing elements, but adding too much will only unnecessarily increase steel manufacturing costs. In particular, Si increases hardness and deteriorates machinability, so The amount added is 0.050% or less for A1 and 0.50% or less for Si.
Ａ１及びＳｉは、いずれか一方のみの添加でもよい。Only one of A1 and Si may be added.
０含有量を０． ＯＯＯ５％以下とすることは、鋼製造
費用の非常な高騰を招き、他方、０．０１％を越えると
きは、超硬合金工具の寿命を劣化させるので、０量は０
．ＯＯ０５〜０．０１％の範囲とする。0 content to 0. Setting OOO to 5% or less will lead to a significant increase in steel manufacturing costs, while if it exceeds 0.01%, the life of the cemented carbide tool will deteriorate, so 0 amount is 0.
．． The range is OO05 to 0.01%.
Ｃａは、硫化物として鋼に添加される。硫化物の球状化
のためには、少なくとも０．００１％の添加が必要であ
る。しかし、０．０１％を越えるときは、製造費用を高
くする。Ca is added to steel as a sulfide. Additions of at least 0.001% are required for spheroidization of the sulfides. However, when it exceeds 0.01%, manufacturing costs increase.
１３ｉは、０．０３％以上の添加にて、被削性改善と硫
化物球状化に有効である。しかし、過多に添加するとき
は、鋼中にてＢｉが偏析し、鋼材品質を低下させるので
、添加量は０．３０％以下とする。13i is effective in improving machinability and spheroidizing sulfides when added in an amount of 0.03% or more. However, when adding too much Bi, Bi segregates in the steel and deteriorates the quality of the steel material, so the amount added should be 0.30% or less.
又所亘募来
以上のように、本発明による硫黄複合快削鋼は、脱酸し
、連続鋳造法によって製造することによって、超硬合金
工具による被削性にすぐれ、更に、Ｃａ及びＢｉを複合
添加することによって、Ｃａ単独添加の複合快削鋼に比
べて、硫化物の球状化度が高（、高速度鋼工具による被
削性にもすぐれる。As described above, the sulfur composite free-cutting steel of the present invention has excellent machinability with cemented carbide tools by being deoxidized and manufactured by continuous casting, and furthermore, it has excellent machinability with cemented carbide tools. By adding the composite, the degree of spheroidization of the sulfide is higher (and the machinability with high-speed steel tools is also superior) compared to composite free-cutting steel with only Ca added.
大旌桝
以下に実施例を挙げて本発明を説明するが、本発明はこ
れら実施例により何ら限定されるものではない。EXAMPLES The present invention will be explained below with reference to Examples, but the present invention is not limited to these Examples in any way.
第１表に示す化学成分を有する鋼を溶製した。Steel having the chemical composition shown in Table 1 was melted.
Ａｌは従来の硫黄快削鋼としての比較鋼、Ａ２鋼は、Ｓ
ｉ脱酸した比較鋼、Ａ３鋼は、ＡＪ及びＳｉ脱酸し、Ｃ
ａを添加した比較鋼である。Ｂｉ鋼、Ｂ２鋼及びＢ３鋼
は、Ａｎ及びＳｉ脱酸し、これにＣａとＢｉとを複合添
加してなる本発明による硫黄複合快削鋼である。Al is comparative steel as conventional sulfur free-cutting steel, A2 steel is S
Comparative steel that was deoxidized by i, A3 steel, was deoxidized by AJ and Si, and C
This is a comparative steel with the addition of a. Bi steel, B2 steel, and B3 steel are sulfur composite free-cutting steels according to the present invention, which are obtained by deoxidizing An and Si and adding Ca and Bi in combination.
これらのそれぞれの鋼を２２ｍ径に加工した後、縦断面
上の硫化物寸法を画像解析装置によって測定した。結果
を第１図に示すように、Ａｌ鋼は、Ａｆ及びＳｉを添加
していないために、硫化物が丸く且つ大きい。Ａ２鋼は
、Ｓｉを添加しているために、Ａｌ鋼に比べて、硫化物
が長く伸びている。また、Ａ３＠は、Ａｌ及びＳｉを添
加しているが、Ｃａの添加効果によって、硫化物の寸法
は幾らか小さいものの、硫化物の長軸Ｌ／短短軸比比、
Ａ１鋼とほぼ等しく、丸い。After processing each of these steels to a diameter of 22 m, the size of sulfide on a longitudinal section was measured using an image analysis device. As the results are shown in FIG. 1, the sulfides in the Al steel were round and large because no Af or Si was added. In A2 steel, since Si is added, sulfides extend longer than in Al steel. In addition, A3@ has Al and Si added, but due to the effect of Ca addition, although the size of the sulfide is somewhat small, the ratio of the major axis L/minor axis ratio of the sulfide is
Almost the same as A1 steel and round.
これら比較鋼に対して、Ｃａのみを添加したＡ３鋼に比
べて、本発明によるＢｉ鋼、８２ｍ及びＢ３鋼は、Ｃａ
及びＢｉの複合添加の効果によって、硫化物は、丸く且
つ大きい。この効果は、Ｂｉ量が多いほど著しい。この
ように、本発明による快削鋼においては、硫化物が丸（
、大きいので、自動盤切削時の仕上面あらさにすぐれる
。Compared to these comparative steels, the Bi steel, 82m and B3 steel according to the present invention have Ca
Due to the effect of the combined addition of Bi and Bi, the sulfide is round and large. This effect becomes more significant as the amount of Bi increases. In this way, in the free-cutting steel according to the present invention, sulfides are round (
Since it is large, it provides excellent surface roughness when cutting with an automatic lathe.
第１図に、旋盤を用いて、上記それぞれの鋼を切削した
ときの超硬合金工具寿命を示す。本発明鋼は、比較鋼に
比べて、超硬合金工具寿命にすぐれることが示される。FIG. 1 shows the cemented carbide tool life when cutting each of the above steels using a lathe. It is shown that the steel of the present invention has an excellent cemented carbide tool life compared to the comparative steel.
切削条件は次のとおりである。The cutting conditions are as follows.
工具 ＰＩＯ 切削速度 ２００ｍ／分 送り ０．２５鶴／ｒｅν。Tools PIO Cutting speed 200m/min Feeding: 0.25 Tsuru/reν.
切込み １．５ ｍ
切削油 なし
寿命基準 Ｖ Ｂ ＝ ０．２冨璽
第２図は、自動盤を用いて、上記それぞれの鋼をフォー
ミング加工したときの仕上面あらさの経過曲線を示す。Depth of cut 1.5 m No cutting oil Life standard V B = 0.2 Fig. 2 shows the progress curve of the finished surface roughness when forming each of the above steels using an automatic lathe.
本発明鋼は、非常にすぐれた仕上面あらさを示す。The steel of the present invention exhibits excellent surface roughness.
切削条件は次のとおりである。The cutting conditions are as follows.
切削機械 車軸自動盤 切削速度 ７０ｍ／分 工具 ５ＫＨ４ 送り ０．０５ ｎ＋／ｒｅｖ。Cutting machine Axle automatic lathe Cutting speed 70m/min Tool 5KH4 Feed: 0.05 n+/rev.
切込み ２．０龍 切削油 水不溶性油Depth of cut 2.0 dragon Cutting oil Water-insoluble oil
第１図は、本発明鋼及び比較鋼を旋盤を用いて切削した
ときの超硬合金工具寿命を示すグラフ、第２図は、本発
明鋼及び比較鋼を自動盤を用いてフォーミング加工した
ときの仕上面あらさの経過曲線を示すグラフである。
第１図Figure 1 is a graph showing the cemented carbide tool life when the invention steel and comparison steel are cut using a lathe, and Figure 2 is a graph showing the life of cemented carbide tools when the invention steel and comparison steel are formed using an automatic lathe. It is a graph showing the progress curve of the finished surface roughness. Figure 1
Claims (1)
黄複合快削鋼。[Claims] 1) C0.60% or less, Mn 0.3 to 2.0%, P 0.12% or less, S 0.12 to 0.40%, Al 0.050% or less, Si 0.50 in weight%. % or less, O 0.0005-0.01%, Ca 0.001-0.01%, Bi 0.01-0.30%, the balance being iron and inevitable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19859088A JPH0756061B2 (en) | 1988-08-08 | 1988-08-08 | Sulfur composite free cutting steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19859088A JPH0756061B2 (en) | 1988-08-08 | 1988-08-08 | Sulfur composite free cutting steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0247242A true JPH0247242A (en) | 1990-02-16 |
| JPH0756061B2 JPH0756061B2 (en) | 1995-06-14 |
Family
ID=16393719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19859088A Expired - Fee Related JPH0756061B2 (en) | 1988-08-08 | 1988-08-08 | Sulfur composite free cutting steel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0756061B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5090729A (en) * | 1989-12-15 | 1992-02-25 | Takata Corporation | Air bag for a passenger |
-
1988
- 1988-08-08 JP JP19859088A patent/JPH0756061B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5090729A (en) * | 1989-12-15 | 1992-02-25 | Takata Corporation | Air bag for a passenger |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0756061B2 (en) | 1995-06-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |