JPH01319652A - Free-cutting stainless steel having superior hot workability - Google Patents
Free-cutting stainless steel having superior hot workabilityInfo
- Publication number
- JPH01319652A JPH01319652A JP15180788A JP15180788A JPH01319652A JP H01319652 A JPH01319652 A JP H01319652A JP 15180788 A JP15180788 A JP 15180788A JP 15180788 A JP15180788 A JP 15180788A JP H01319652 A JPH01319652 A JP H01319652A
- Authority
- JP
- Japan
- Prior art keywords
- hot workability
- machinability
- cutting
- stainless steel
- 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.)
- Pending
Links
- 238000005520 cutting process Methods 0.000 title description 33
- 229910001220 stainless steel Inorganic materials 0.000 title description 8
- 239000010935 stainless steel Substances 0.000 title description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 229910052711 selenium Inorganic materials 0.000 claims abstract description 7
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 4
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 3
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 abstract description 17
- 238000005260 corrosion Methods 0.000 abstract description 17
- 229910000831 Steel Inorganic materials 0.000 abstract description 11
- 239000010959 steel Substances 0.000 abstract description 9
- 229910000915 Free machining steel Inorganic materials 0.000 abstract description 4
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 abstract description 2
- 229910052748 manganese Inorganic materials 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
- 239000011669 selenium Substances 0.000 description 12
- 239000000463 material Substances 0.000 description 10
- 239000010949 copper Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229910001566 austenite Inorganic materials 0.000 description 4
- 239000011651 chromium Substances 0.000 description 4
- 239000010730 cutting oil Substances 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 229910000765 intermetallic Inorganic materials 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 2
- 229910052797 bismuth Inorganic materials 0.000 description 2
- 230000002301 combined effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910004541 SiN Inorganic materials 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000014759 maintenance of location Effects 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
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229940082569 selenite Drugs 0.000 description 1
- MCAHWIHFGHIESP-UHFFFAOYSA-L selenite(2-) Chemical compound [O-][Se]([O-])=O MCAHWIHFGHIESP-UHFFFAOYSA-L 0.000 description 1
- 150000003346 selenoethers Chemical class 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はオーステナイト系ステンレス鋼としての耐食性
を保持し、切削性に優れ、かつ熱間加工性の良好なＳｉ
Ｓｅ 、Ｃｕ等を含有する快削ステンレス鋼に関するも
のである。[Detailed Description of the Invention] [Industrial Application Field] The present invention is a Si material that maintains corrosion resistance as an austenitic stainless steel, has excellent machinability, and has good hot workability.
This relates to free-cutting stainless steel containing Se, Cu, etc.
［従来の技術］
オーステナイト系ステンレス鋼は一般に耐食性、耐錆性
に優れている反面、一般の鋼に比して、機械加工時の切
削性か悪い。そこで切削性を高めるため、ＳｉＳｅ、Ｐ
ｂ、Ｔｅ、Ｂｉ等の快削元素を単独もしくは複合で適宜
添加して切削性の改善かはかられ、実用化されている。[Prior Art] Although austenitic stainless steel generally has excellent corrosion resistance and rust resistance, it has poor machinability during machining compared to general steel. Therefore, in order to improve machinability, SiSe, P
The improvement of machinability has been investigated and put to practical use by appropriately adding free-cutting elements such as B, Te, and Bi, singly or in combination.
例えば、５ＩＪＳ ３０３はＳを０．１５％以上を添加
し、又ＳＯ３３０３ＳｅはＳｅを０１５％以上添加し、
切削性能をイ」与している。さらにＳにＰｂ、Ｂｉ、Ｔ
ａ等を添加し切削性能を高める方策がとられている。For example, 5IJS 303 has 0.15% or more of S added, and SO3303Se has 0.15% or more of Se added,
It gives excellent cutting performance. Furthermore, S has Pb, Bi, and T.
Measures have been taken to improve cutting performance by adding a and the like.
［発明が解決しようとする課題］
しかしなから、例えば５ＵＳ３０３についていえば５Ｏ
１１５％以上の規格となっているか、Ｓ量を増加するに
従い、切削性は向」ニするか、５ｆｆｉか０３５％以上
になると熱間加工性か著しく悪化しはじめ、歩留か低下
し、経済的製造かむずかしくなってくる。又、耐食性の
低下も著しくなる。[Problem to be solved by the invention] However, for example, regarding 5US303, 5O
If the standard is 115% or more, as the amount of S increases, the machinability will improve, or if it becomes 5ffi or 035% or more, the hot workability will start to deteriorate significantly, the yield will decrease, and the economy will deteriorate. It becomes difficult to manufacture targets. Moreover, the corrosion resistance is also significantly reduced.
５ＩＩＳ３０３Ｓ ｅについても同様にＳｅの多量添加
は切削性の向上と反比例し、熱間加工性と耐食性な悪く
する。Similarly, for 5IIS303S e, addition of a large amount of Se is inversely proportional to the improvement in machinability and deteriorates hot workability and corrosion resistance.
さらに、ｐ ｂ−ｓ複合快削鋼においても、ｐｂ、Ｓの
量を増加するに従って、切削性は良好となるか、耐食性
、熱間加工性か悪くなり、経済的に切削性のよい鋼を製
造することが困菓１ｔとなる。Furthermore, in PBS composite free-cutting steel, as the amount of Pb and S increases, the machinability either improves or the corrosion resistance and hot workability deteriorate, making it difficult to economically choose steel with good machinability. The production will amount to 1 ton of sweets.
そこで本発明は、耐食性をあまり害せず、かつ通常のオ
ーステナイト系ステンレス鋼とほぼ同し条件で経済的に
製造可能な熱間加工性のよい、快削ステンレス鋼を提供
するにある。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a free-cutting stainless steel with good hot workability that does not significantly impair corrosion resistance and can be economically produced under substantially the same conditions as ordinary austenitic stainless steel.
［課題を解決するだめの手段］
本発明はこうした課題を解決するために重量割合にて
Ｃ：０．１０％以下 Ｓｌ：、０．５０％以下Ｍ
ｎ ： １．００〜２．００％ Ｎｉ ： ８．
Ｏ［］〜１０．００％Ｃｒ：１７．ＯＯ〜１９００％
Ａ Ａ ： ０．０１５％以下Ｎ００３〜００８％
８０１０〜０３５％Ｃｕ ２５０〜４０％ Ｓ
ｅ ： ０．０３〜０．１２％を含有し、残部かＦｅお
よび不可避的不純物元素からなる、熱間加工性に優れ、
かつ切削性の良好なオーステナイ［・系ステンレス鋼と
している。[Means for Solving the Problems] In order to solve these problems, the present invention provides C: 0.10% or less, Sl: 0.50% or less, M
n: 1.00-2.00% Ni: 8.
O [] ~ 10.00% Cr: 17. OO~1900%
A A: 0.015% or less N003-008%
8010~035%Cu 250~40%S
e: Contains 0.03 to 0.12%, with the balance consisting of Fe and unavoidable impurity elements, excellent hot workability,
It is made of austenite stainless steel with good machinability.
１作 用］
前記成分の調整にあたって、まずＳとＳｅの関係か重要
である。ＳはＭｎＳｉＳｅは金属間化合物（セレナイ［
・）を形成して鋼中に存在し、切削性を付与するもので
あるか、Ｓｅか０１２％以−１−になると、熱間加工性
を極めて悪くし、表面疵を発生し、加工歩留を低下させ
る。又、Ｓｅか０゜０３％以下では切削性にあまり効果
かない。Ｓについても０．３５％以上になると熱間加工
性か悪くなり又０１％以下になれば切削性か劣化する。1 Effect] In adjusting the above-mentioned components, first of all, the relationship between S and Se is important. S is MnSiSe is an intermetallic compound (Selenium [
・) is present in the steel and imparts machinability, or if it becomes more than 0.12%, hot workability becomes extremely poor, surface flaws occur, and the processing steps are reduced. lowers retention. Furthermore, if Se is less than 0.03%, it does not have much effect on machinability. Regarding S, if it exceeds 0.35%, the hot workability deteriorates, and if it becomes less than 0.1%, the machinability deteriorates.
次に切削性イ」与に及ぼすＳｉＳｅ、Ｃｕ、Ｎの複合作
用についてのへる。Next, we will discuss the combined effect of SiSe, Cu, and N on machinability.
オーステナイト系ステンレス鋼の切削性能を向上させる
ためには、切削抵抗を下げかつ、切削時の先行亀裂を起
しやすくすることか有効である。In order to improve the cutting performance of austenitic stainless steel, it is effective to lower the cutting resistance and to make it easier for preliminary cracks to occur during cutting.
この問題を解決するために、ＭｎＳ介在物とＳｅの金属
間化合物（セレナイト）との複合効果により、切削時に
先行亀裂を起しやずくさせる。この場合、Ｓを熱間加工
可能な最大限０．３５％以下に設定して、Ｓｅを添加し
ていくと、Ｓｅの増加にしたかい熱間加工性か劣化して
くる。よって熱間加工性を害しない範囲で、しかも切削
性に有効に働く範囲として０．０３〜０１２％か適正で
ある。次にＣｕの作用であるか、強力なオーステナイｉ
〜フォーマー元素で地に固溶して軟らかくし、切削抵抗
を低くして切削性能向上させるか、一方亀裂発生度か劣
化するためこれをカバーする必要があり、この方策とし
てＮの少量添加が極めて有効である。Ｎを多量に添加す
ると材質を硬化し切削性を劣化させる。To solve this problem, the combined effect of MnS inclusions and Se intermetallic compound (selenite) causes preliminary cracks to occur during cutting. In this case, if S is set to 0.35% or less, the maximum that allows hot workability, and Se is added, the hot workability will deteriorate as the Se content increases. Therefore, 0.03 to 012% is appropriate as a range that does not impair hot workability and also works effectively on machinability. Next, it may be due to the effect of Cu, or the strong austenite i
~ It is necessary to dissolve the former element into the ground to make it soft and reduce the cutting resistance to improve the cutting performance, but on the other hand, it is necessary to compensate for the deterioration of the degree of cracking. It is valid. Adding a large amount of N hardens the material and deteriorates machinability.
よって０．０３〜０．０８％の範囲か適正である。Therefore, a range of 0.03 to 0.08% is appropriate.
さらに、本発明の成分限度について説明する。Furthermore, the component limits of the present invention will be explained.
Ｓ（硫黄）
Ｓは前記したように切削性、熱間加工性及び耐食性に関
与する元素として極めて重要である。０１％以下では切
削性か悪く、又０．３５％以十になると熱間加工性を悪
くし、表面疵発生の原因となる。よって０．１０％〜０
．３５％とした。S (Sulfur) As mentioned above, S is extremely important as an element involved in machinability, hot workability, and corrosion resistance. If it is less than 0.01%, machinability will be poor, and if it is more than 0.35%, hot workability will be poor and cause surface flaws. Therefore, 0.10%~0
．． It was set at 35%.
特に０１５％〜０．３２％が最も適している。In particular, 0.015% to 0.32% is most suitable.
Ｓｅ （セレン）
Ｓｅは金属間化合物（セレナイド）を形成し、切削性向
上に効果かあるか、材質を脆化させて熱間加工性を極め
て悪くする。よって０．０３％〜０１２％としたか、特
に切削性と加工性とを兼ねそなえるために０．０５〜０
．１２％か最適である。Se (Selenium) Se forms an intermetallic compound (selenide), which may be effective in improving machinability, but it also embrittles the material and extremely deteriorates hot workability. Therefore, it was set at 0.03% to 0.12%, or 0.05 to 0.0% in order to have both machinability and workability.
．． 12% is optimal.
Ｃｕ （銅）
Ｃｕは耐熱性、切削性を向上させるが、４．０％以上添
加すると粒界に析出し、加工性を極めて悪くする。よっ
て２５〜４．０％とした。偏析等を考慮した場合２５〜
３５％が最適である。Cu (Copper) Cu improves heat resistance and machinability, but when added in an amount of 4.0% or more, it precipitates at grain boundaries and extremely deteriorates workability. Therefore, it was set at 25 to 4.0%. 25~ when considering segregation, etc.
35% is optimal.
Ｎ（窒素）
Ｎは地に固溶し、Ｃｕとは逆に地を硬くし、切削抵抗を
若干上げるが、切削時の先行亀裂を起しやすくし、焼付
防止に有効に働き、かつ切粉の分断性か向上し、切削表
面をなめらかにする働きかある。しかし多過ぎると、切
削抵抗を大きくし、工具寿命を短かくし切削性能を悪く
する。N (Nitrogen) N is dissolved in the ground, and contrary to Cu, it hardens the ground and slightly increases the cutting resistance, but it also makes it easier to cause preliminary cracks during cutting, works effectively to prevent seizure, and removes chips. It has the effect of improving the parting properties and smoothing the cutting surface. However, if it is too large, cutting resistance increases, tool life is shortened, and cutting performance deteriorates.
よって０．０３〜０．０８％とした。Therefore, it was set at 0.03 to 0.08%.
Ａ℃ （アルミニューム）
へヰの微量添加は△Ａ２０３ ＣａＯＳ＋ ０２の低
融点複合介在物を作り、切削性にとって有効であるか、
必要以上の添加はかたいＡｆ１２０３の介在物を作り、
切削性を悪くするばかりでなく、強力なフェライト生成
元素のため組織を不安定にし熱間加工性を悪くする。よ
って、０．０１５％以下とした。A℃ (aluminum) Is the addition of a small amount of heat to create low melting point composite inclusions of △A203 CaOS+ 02 and is effective for machinability?
Adding more than necessary creates hard Af1203 inclusions,
Not only does it impair machinability, but the strong ferrite-forming elements make the structure unstable and impair hot workability. Therefore, it was set to 0.015% or less.
Ｃ（炭素）
Ｃか多いとクロームカーバイトをつくり耐食性を悪くす
るとともに、地を硬くし切削抵抗を大きくして切削性を
悪くするため０．１０％以下とした。C (Carbon) If C is too large, it creates chrome carbide, which deteriorates corrosion resistance, and also hardens the base, increases cutting resistance, and impairs machinability, so the content was set to 0.10% or less.
Ｓｉ （けい素）
Ｓｉはフェライトフ詞−マーの元素で、かつ地を硬くし
、切削抵抗を大きくし切削性を悪くするため脱酸に必要
な程度におさえ０５０％以下とした。Si (Silicon) Si is an element of ferrite metal, hardens the base, increases cutting resistance, and impairs machinability, so it was kept to a level necessary for deoxidation, 0.50% or less.
Ｍｎ（マンカン）
ＭｎはＳと結合してＭｎＳの形成して介在物となり切削
性を支配する重要な元素である。しかし過度に多いと切
削性を害するためＭ ｎ Ｓの固定に必要な最小限（０
７０％）よりＳの偏析を考慮して若干条目とし１００〜
２００％とした。Mn (Mankan) Mn is an important element that combines with S to form MnS to become inclusions and controls machinability. However, if there is too much, the machinability will be impaired, so the minimum amount (0
70%), it is slightly grained considering the segregation of S. 100~
It was set as 200%.
Ｎｉにッケル）
Ｎ１はオーステナイ１〜生成元素であり、加工性、耐食
性の面からオーステナイトａ織を安定させるため８．０
０％〜１０．００％とした。なお、あまり多くすると経
済的に不利であるばかりでなく、切削性も悪くする。Ni) N1 is an element that forms austenite 1 to 8.0 to stabilize the austenite A weave from the viewpoint of workability and corrosion resistance.
The content was set at 0% to 10.00%. Incidentally, if the amount is too large, it is not only economically disadvantageous but also reduces machinability.
Ｃｒ （クローム）
Ｃｒは１９．００％以−１−になるとフェライトが多く
生成し熱間加工性を悪くする。又１．７．００％以下で
は耐食性を劣化させるため１．７．Ｏ○〜１９００％と
した。Cr (Chromium) When Cr exceeds 19.00% -1-, a large amount of ferrite is generated, which impairs hot workability. Moreover, if it is less than 1.7.00%, the corrosion resistance will deteriorate, so 1.7. It was O○~1900%.
（以下余白）
「実施例」
第１表に示す成分を有する鋼塊を、本発明のサンプル１
〜５及び比較材のサンプル６〜１１に従って溶製し夫々
以下に述へる試験に合せて調製したサンプルについて、
熱間加工性、切削性及び耐食性を比較試験した。(Left below) "Example" A steel ingot having the components shown in Table 1 was prepared as sample 1 of the present invention.
~ 5 and samples 6 to 11 of comparative materials and prepared according to the tests described below, respectively.
Comparative tests were conducted for hot workability, machinability, and corrosion resistance.
第１図は、各サンプルの熱間加工性を示すもので、試験
の方法は夫々の成分を有する鋼塊を１１０φのビレット
に分塊圧延後サンプリングし、９００〜鳳 ２００℃の
範囲において高温高速引張試験（グリ−プル試験）を行
なった。Figure 1 shows the hot workability of each sample.The test method was to sample a steel ingot with each component after blooming into a 110φ billet, and heat it at high temperature and high speed in the range of 900 to 200℃. A tensile test (Greeple test) was conducted.
第１図から、本発明のサンプル４及び５は比較材のサン
プル６ （ＳｔｌＳ ３０４）より熱間加工性は少し劣
るか、従来の快削ステンレス（比較材８〜１１）よりは
るかにすくれ、本発明のサンプル１．２及び３において
も９０００Ｃ以上で、絞り値７０％以上あり、熱間加工
性が従来のものより、すぐれていることを示す。From FIG. 1, samples 4 and 5 of the present invention are slightly inferior in hot workability to sample 6 (StlS 304), which is a comparative material, or are much more easily cut than conventional free-cutting stainless steel (comparative materials 8 to 11). Samples 1.2 and 3 of the present invention also had a reduction of area of 70% or more at 9000C or higher, indicating that their hot workability was superior to that of the conventional ones.
第２図（ａ）、第４図及び第５図は、切削ニー具の寿命
に関するもので、第１表に示す成分の鋼塊を溶製し、熱
間圧延後、供試材を１．１．００℃に加熱して固溶化処
理を行い調製した各サンプルについて高速自動盤、旋削
及び穴あけを行い、その際の工具寿命をもって切削性を
評価した。Figures 2(a), 4, and 5 relate to the life of the cutting knee tool.A steel ingot having the composition shown in Table 1 was melted, and after hot rolling, the test material was 1. Each sample prepared by heating to 1.00° C. and solution treatment was subjected to high-speed automatic lathe turning and drilling, and the machinability was evaluated based on the tool life at that time.
第２図（ａ） １．＊高速自動盤による工具ノｆ命を示
す。Figure 2 (a) 1. *Indicates tool life using a high-speed automatic lathe.
切削条件
切削速度 ４８ 、 ５ （ｍ／ｍｉｎ、）回１１広数
１ ９ ４ ２ （ｒｐｍ）ザイクルタ
イム ３３
切込み １．５（ｍｍ）
スクイ角 ２０゜
工具幅 ８．０（ｍｍ）
切削油 なし
工具寿命の判定はＶＢ＝０． ２ （ｍｍ）に達するま
でに第２図（ｂ）に示す加工形状の製品を幾つ加工出来
るかにより判定した。Cutting conditions Cutting speed 48, 5 (m/min,) times 11 wide number 1 9 4 2 (rpm) Cycle time 33 Depth of cut 1.5 (mm) Rake angle 20° Tool width 8.0 (mm) Cutting oil No tool Judgment of lifespan is based on VB=0. The judgment was made based on how many products having the shape shown in FIG. 2(b) could be processed until reaching 2 (mm).
第４図は旋削工具寿命を示す。Figure 4 shows the turning tool life.
切削条件
工具 Ｐ １．０
送り ０ 、 ２ （ｍｍ／ｒｅｖ）切込み
１．０（ｍｍ）
切削油 ・なし
ヅテ命判定： ＶＢ＝０．２ （ｍｍ）第５図は穴あＧ
ツ工具寿命を示す。Cutting conditions Tool P 1.0 Feed 0, 2 (mm/rev) Depth of cut
1.0 (mm) Cutting oil / None Life judgment: VB = 0.2 (mm) Figure 5 shows hole G
Indicates tool life.
工具５ＫＨ９
１０φス］・レート・トリル
送り Ｏｏｌ ５ （ｍｍ／ｒｅｖ）穴深さ
３０（ｍｍ）未貫通
切削油 、なし
寿命判定・溶損
以上第２図（ａ）、第４図及び第５図に示すとおり本発
明の１．２．３及び本発明の４，５の各サンプルは高速
自動盤、旋削及び穴あけの各切削試験においていずれも
良好な結果を示した。又、切粉の分断性においても他の
比較材に比して良好な結果を示した。第３図は耐食性を
示すもので、固溶化処理後スケール除去した各サンプル
について、塩水噴霧により耐食試験を行なった。Tool 5KH9 10φS] Rate Trill Feed Ool 5 (mm/rev) Hole Depth
30 (mm) non-penetrating cutting oil, none Life judgment/Erosion damage or more As shown in Fig. 2 (a), Fig. 4, and Fig. 5, each of 1.2.3 of the present invention and 4, 5 of the present invention The sample showed good results in all cutting tests of high-speed automatic lathe, turning, and drilling. It also showed better results in terms of cutting chips than other comparative materials. FIG. 3 shows the corrosion resistance, and a corrosion resistance test was conducted using salt water spray on each sample from which scale had been removed after solution treatment.
試験条件
３５°Ｃ
５％食塩水
連続９６時間
判定基準
図に示すように比較材６ （ＳＵＳ３０４）に比して若
干劣るが他の比較材（快削ステンレス鋼）に比して優れ
ている。Test conditions: 35°C, 5% saline solution, continuous 96 hours.As shown in the criteria diagram, it is slightly inferior to Comparative Material 6 (SUS304), but superior to other comparative materials (free-cutting stainless steel).
［発明の効果］
Ｃｕ、Ｓｅ、ＳｉＮの各成分を特許請求の範囲に定め複
合添加し、かつＣ，Ａｆｌ、Ｓｌ、Ｍｎ等の各成分を特
許請求の範囲内でコントロールすることにより熱間加工
性かよく、従って、一般のオースブナイト系ステンレス
鋼（ＳＵＳ３０４）とほぼ同］ ２
等の条件で製造が可能で、かつ耐食性、切削性能に優れ
た快削ステンレス鋼を提供するものである。[Effects of the invention] Hot processing can be achieved by adding Cu, Se, and SiN components as defined in the claims and by controlling each component such as C, Afl, Sl, and Mn within the claims. The object of the present invention is to provide a free-cutting stainless steel that can be manufactured under conditions such as [2] and has excellent corrosion resistance and cutting performance.
第１図は熱間加工性を示す図、第２図（ａ）は高速自動
盤による工具寿命を示す図、第２図（ｂ）は高速自動盤
による製品の加工形状を示す正面図、第３図は耐食性を
示す図、第４図は旋削工具寿命を示す図、第５図は穴あ
け工具寿命を示す図である。
特許出願人 日本高周波鋼業株式会社代理人 弁理士
佐 藤 英 昭
吋
子糸ダｄネ市正書（自発）
特許庁長官 吉 １）文 毅 殿
１、事件の表示
昭和６３年特許願第１５１８０７号
２ 発明の名称
熱間加工性の良好な快削ステンレス鋼
３ 補正をする者
事件との関係 特許出願人
住 所 東京都千代田区大手町１丁目７番２号名 称
口本高周波鋼業株式会社
代表者 岩城正保
５、補正命令の日イマ１ 自 発６ 補正の対
象
明細書の「発明の詳細な説明」の欄
（１）明細書の第１１頁第１７行目の次に下記の文章を
加入する。
記
ＶＢはハイド刃先の二番摩耗量である。
（２）同書の第１２頁第１１行目の次に下記の文章を加
入する。
記
ＰＩＯば、超硬チップのＪＩＳの使用分類記号の１種で
、鋼・鋳鋼品切削用であって、高速。
小〜中切削面積１作業条件の比較的良いときに使用する
。Figure 1 is a diagram showing hot workability, Figure 2 (a) is a diagram showing tool life with a high-speed automatic lathe, Figure 2 (b) is a front view showing the shape of a product machined with a high-speed automatic lathe, FIG. 3 is a diagram showing corrosion resistance, FIG. 4 is a diagram showing turning tool life, and FIG. 5 is a diagram showing drilling tool life. Patent Applicant Japan Koshuha Steel Co., Ltd. Agent Patent Attorney Hide Sato Akiko Itodane City Masashi (spontaneous) Commissioner of the Patent Office Yoshi 1) Moon Yi 1, Indication of Case 1988 Patent Application No. 151807 No. 2 Name of the invention Free-cutting stainless steel with good hot workability 3 Relationship to the case of the person making the amendment Patent applicant address 1-7-2 Otemachi, Chiyoda-ku, Tokyo Name
Kuchimoto Koshuha Steel Co., Ltd. Representative Masayasu Iwaki 5, Date of amendment order 1 Voluntary 6 Column ``Detailed explanation of the invention'' of the specification to be amended (1) Page 11, line 17 of the specification Add the following text next to . VB is the second wear amount of the hide cutting edge. (2) Add the following sentence next to page 12, line 11 of the same book. PIO is one of the JIS classification codes for carbide tips, and is for cutting steel and cast steel products at high speed. Small to medium cutting area 1 Use when working conditions are relatively good.
Claims (1)
０％Ｃｒ：１７．００〜１９．００％Ａｌ：０．０１５
％以下Ｎ：０．０３〜０．０８％Ｓ：０．１０〜０．３
５％Ｃｕ：２．５０〜４．０％Ｓｅ：０．０３〜０．１
２％を含有し、残部がＦｅおよび不可避的不純物元素か
らなる熱間加工性に優れ、かつ切削性の良好なオーステ
ナイト系ステンレス鋼。[Claims] C: 0.10% or less Si: 0.50% or less Mn: 1.00 to 2.00% Ni: 8.00 to 10.0
0%Cr: 17.00-19.00%Al: 0.015
% or less N: 0.03-0.08% S: 0.10-0.3
5% Cu: 2.50-4.0% Se: 0.03-0.1
An austenitic stainless steel having excellent hot workability and good machinability, with the balance being Fe and unavoidable impurity elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15180788A JPH01319652A (en) | 1988-06-20 | 1988-06-20 | Free-cutting stainless steel having superior hot workability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15180788A JPH01319652A (en) | 1988-06-20 | 1988-06-20 | Free-cutting stainless steel having superior hot workability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01319652A true JPH01319652A (en) | 1989-12-25 |
Family
ID=15526738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15180788A Pending JPH01319652A (en) | 1988-06-20 | 1988-06-20 | Free-cutting stainless steel having superior hot workability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01319652A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0736610A1 (en) * | 1995-04-07 | 1996-10-09 | UGINE SAVOIE (société anonyme) | Resulfurized austenitic stainless steel with improved machinability, suitable for use in the field of high-speed cutting and on the automatic lathe |
-
1988
- 1988-06-20 JP JP15180788A patent/JPH01319652A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0736610A1 (en) * | 1995-04-07 | 1996-10-09 | UGINE SAVOIE (société anonyme) | Resulfurized austenitic stainless steel with improved machinability, suitable for use in the field of high-speed cutting and on the automatic lathe |
| FR2732694A1 (en) * | 1995-04-07 | 1996-10-11 | Ugine Savoie Sa | AUSTENITIC RESULFURING STAINLESS STEEL WITH IMPROVED MACHINABILITY, USED ESPECIALLY IN THE FIELD OF VERY HIGH-SPEED CUTTING MACHINING AND THE FIELD OF DECOLLETAGE |
| US5656237A (en) * | 1995-04-07 | 1997-08-12 | Ugine Savoie | Resulfurized austenitic stainless steel with improved machinability |
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