JPH0250937A - Free cutting stainless steel for header - Google Patents
Free cutting stainless steel for headerInfo
- Publication number
- JPH0250937A JPH0250937A JP31130888A JP31130888A JPH0250937A JP H0250937 A JPH0250937 A JP H0250937A JP 31130888 A JP31130888 A JP 31130888A JP 31130888 A JP31130888 A JP 31130888A JP H0250937 A JPH0250937 A JP H0250937A
- Authority
- JP
- Japan
- Prior art keywords
- less
- stainless steel
- header
- corrosion resistance
- free cutting
- 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
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 36
- 239000010935 stainless steel Substances 0.000 title claims abstract description 27
- 238000005520 cutting process Methods 0.000 title claims abstract description 13
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 5
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 3
- 229910052711 selenium Inorganic materials 0.000 claims abstract description 3
- 229910052799 carbon Inorganic materials 0.000 claims abstract 2
- 230000007797 corrosion Effects 0.000 abstract description 19
- 238000005260 corrosion Methods 0.000 abstract description 19
- 229910000831 Steel Inorganic materials 0.000 abstract description 8
- 239000010959 steel Substances 0.000 abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910019589 Cr—Fe Inorganic materials 0.000 description 1
- 229910021578 Iron(III) chloride Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000001784 detoxification Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 235000011149 sulphuric acid Nutrition 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 238000005491 wire drawing Methods 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
Description
（産業上の利用分野）
この発明は、ヘッダー加工を受けるステンレス鋼として
利用するのに適したヘッダー用快削ステンレス鋼に関す
るものである。
（従来の技術）
ヘッダー加工を受けるステンレス鋼は、軟質でかつ加工
硬化性が少なく、表面欠陥や内質欠陥の少ないものであ
ることが要求され、従来において、ヘッダー加工を受け
るヘッダー用ステンレス鋼としては、例えば、０．０５
％Ｃ０１５％５ｉ−１，０％Ｍ ｎ −１０、５％Ｎｉ
１８．０％Ｃｒ−Ｆｅよりなるもの（ＪＩＳＳＵＳ３０
４相当材）が用いられていた。
（発明が解決しようとする課題）
しかしながら、このような従来のへツター用ステンレス
鋼にあっては、被削性があまり良くないという問題点が
あった。
そこで、ヘッダー用ステンレス鋼の被削性を改善するた
めＰｂ、Ｓ、Ｂｉ等の快削元素を添加することも試みら
れてきたが、これらの元素はステンレス鋼の被削性をあ
る程度改善するものの、ステンレス鋼本来の特長である
耐食性を著しく阻害したり、また熱間加工性や冷間加工
性（ヘッダー性〕を害したりするため、工業的な生産に
は不適当であるという課題を有していた。
（発明の目的）
この発明は、上述した従来の課題を解決するためになさ
れたもので、冷間加工性（へ・ンダー性）とステンレス
鋼本来の耐食性とのいずれにおいても良好であり、しか
も被削性にも優れ、工業的生産性においても何んら支障
をもたらさないヘングー用快削ステンレス鋼を提供する
ことを目的としている。(Industrial Application Field) The present invention relates to a free-cutting stainless steel for a header that is suitable for use as a stainless steel subjected to header processing. (Conventional technology) Stainless steel to be subjected to header processing is required to be soft, have low work hardening properties, and have few surface defects and internal defects. For example, 0.05
%C015%5i-1,0%Mn-10, 5%Ni
Made of 18.0% Cr-Fe (JISSUS30
4 equivalent material) was used. (Problems to be Solved by the Invention) However, such conventional stainless steel for helters has a problem in that its machinability is not very good. Therefore, attempts have been made to add free-cutting elements such as Pb, S, and Bi to improve the machinability of stainless steel for headers, but although these elements improve the machinability of stainless steel to some extent, However, it has the problem that it is unsuitable for industrial production because it significantly impedes the corrosion resistance, which is an inherent feature of stainless steel, and also impairs hot workability and cold workability (headerability). (Purpose of the Invention) This invention was made to solve the above-mentioned conventional problems, and has good cold workability (henderability) and corrosion resistance inherent to stainless steel. The object of the present invention is to provide a free-cutting stainless steel for hengoos that has excellent machinability and does not cause any problems in industrial productivity.
（課題を解決するための手段）
この発明に係るヘッダー用快削ステンレス鋼は、重量％
で、Ｃ・０．１％以下、Ｓｉ・１．０％以下、Ｍ ｎ
： ２ 、０％以下、ｐ：ｏ、１０％以下、Ｓ：０．４
０％以下、Ｃｕ ： １ 、０〜５ 、０％、Ｎｉ ニ
ア、０−１５．０％、Ｃｒ：１５．０〜２０．０％、Ｓ
ｅ ： ０．３０％以下、ＣａＯ，１０％以下、Ｂ：ｏ
、０５％以下、Ｏ。
０．０２％以下、残部Ｆｅおよび不純物からなることを
特徴としており、このような成分組成のヘングー用快削
ステンレス鋼の構成を十〇１〜した従来の課題を解決す
るだめの手段としたことを特徴としている。
次に、この発明に係るヘッダー用快削ステンレス鋼の成
分組成（重量％）の限定理由について説明する。
Ｃ：０．１％以下
Ｃは強力なオーステナイト安定化元素であるが、多すぎ
るとヘラター性および耐食性を悪化させるので、このよ
うな意味から０．１％以下とした。
Ｓｉ：１．０％以下
Ｓｉは鋼の溶製時に脱酪剤として作用する元素であるほ
か、フェライト化元素であり、耐醇化性を向上させるの
にも有効な元素であるのでより望ましくは０．１％以上
含有させるが、多すぎるとベラター性および靭性を低下
させるので１．０％以下とした。
Ｍ ｎ ： ２ 、０％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
元素であるほか、オーステナイト化元素でもあり、赤熱
脆性を防止するのにも有効な元素であるのでより望まし
くは０．５％以上含有させるが、多量に含有すると被削
性を低下させるので２．０％以下とした。
Ｐ：０．１０％以下
Ｐ含有量が多すぎると熱間加工性およびヘラター性が害
されるので、熱間加工性およびヘラター性が大きく害さ
れない０．１０％以下とした。
Ｓ：０．４０％以下
Ｓ含有量が多すぎると熱間加工性や耐食性が低下するの
で、熱間加工性や耐食性が大きく低下しない０．４０％
以下とした。
Ｃｕ：１．０〜５．０％
Ｃｕはオーステナイト安定化元素であり、耐食性および
耐酸化性を改善するのに有効な元素であるので、このよ
うな効果を得るために１，０％以上含有させるが、多量
に含有すると熱間加工性を害するので５，０％以下とし
た。
Ｎｉ：７．０〜１５，０％
Ｎｉはオーステナイト系ステンレス鋼の基本元素であり
、安定なオーステナイト相を形成し、鋼の耐食性および
靭性を向上させるのに有効な元素であるので、このよう
な効果を得るために７．０％以上含有させるが、多量に
添加すると被剛性を低下させかつまた高価にさせるので
１５．０％以下とした。
Ｃｒ：１５．０〜２０．０％
Ｃｒはオーステナイト系ステンレス鋼の基本元素であり
、耐食性および耐酸化性の向上に寄与する元素であるの
で、このような効果を得るために１５．０％以上含有さ
せるが、多量に含有するとベラター性を低下させるので
２０．０％以下とした。
Ｓｅ：０．３０％以下
Ｓｅはオーステナイト系ステンレス鋼の被剛性を向上さ
せるのに有効な元素であるが、多すぎると熱間加工性を
害するので、熱間加工性が大きく害されない０．３０％
以下の範囲で添加した。
Ｃａ：０．１０％以下
Ｃａは熱間加工性を向上させ、鋼材の製造性を改善する
のに有効な元素であるので０．１０％以下の範囲で捺加
した。
Ｂ：０．０５％以下
Ｂは熱間加工性を向」ニさせ、鋼材の製造性を改善する
のに有効な元素であるので、０．０５％以下の範囲で添
加した。
０二０．０２％以下
Ｏ含有量が多すぎると鋼中に醇化物を多量に形成し、耐
食性に有害であるほか、熱間加工性およびヘラター性を
低下させるので０．０２％以下とした。
そのほか、耐食性をより一層向上させるためにＭｏを５
．０％以下の範囲で添加し、脱酩をさらに有効に行うた
めにＡｌを１．５０％以下の範囲で添加し、耐食性およ
び強度等の改善を行うためにＺｒを０．５％以下、Ｔｉ
を２．０％以下。
Ｎｂを３６０％以下、■を０．５％以下、Ｔａを０．５
％以下のうちの１種または２種以上を添加してもよい。
（実施例）
第１表に示す化学成分のオーステナイト系ステンレス鋼
を２トン電気炉により溶製し、鋼塊としたのち分塊圧延
、線材圧延および熱処理を行い、さらには線引を行って
直径９．０ｍｍのステンレス鋼線材を得た。
次に第１表に示した本発明実施例Ｎｏ、１．２゜３．４
，５．６および比較例Ｎｏ、 ７ 、８のステンレス鋼
の被削性を調べた。このときの被削性評価試験は第２表
に示す条件で行った。この結果を第１図に示す。
第 ２ 表
第１図に示した結果より明らかなように、本発明ステン
レス鋼Ｎｏ、 １ 、２ 、３ 、４ 、５ 、６の
ドリル寿命速度は、比較ステンレス鋼Ｎｏ、 ７ 、８
のドリル寿命速度に比べてかなり大きな値を示しており
、被削性に著しく優れたものであることが認められた。
次に、第１表に示した各ステンレス鋼（Ｎｏ、 １〜
８）よりなる直径６．０ｍｍ、長さ１１．５１１１１ｍ
の各試料につき冷間におけるアプセット加工を行ってそ
の際の応力（ｋｇｆ／ｍｍ２）とひすみ（ｆｌ ｎ
Ｈｏ ／ Ｈ）との関係を調べた。この結果を第２図に
示す。
第２図に示した結果より明らかなように、本発明ステン
レス鋼Ｎｏ、１．２，３，４，５．６は、比較ステンレ
ス鋼Ｎｏ、 ７ 、８と同等の応力−ひすみ特性を示し
ており、本発明ステンレス鋼は比較ステンレス鋼に比べ
て被削性が大幅に向上しているにもかかわらず、すぐれ
た冷間アプセット性、すなわちすぐれたヘッダー性を有
していることが認められた。
さらに、第１表に示した各ステンレス鋼（Ｎｏ。
１〜８）よりなる直径９．０ｍｍ、長さ１００ｍｍの各
試料につき、５％Ｈ２ＳＯ４（沸騰）および塩化第２鉄
による耐食性評価試験を行い、腐食減少（ｇ／ｍ２・ｈ
）によって評価した。この結果を第３図に示す。
第３図に示した結果より明らかなように、本発明ステン
レスｔＩ４Ｎｏ、１．２，３，４，５．６は、比較ステ
ンレス鋼Ｎｏ、 ７ 、８とほぼ同等の腐食減量となっ
ており、本発明ステンレス鋼は比較ステンレス鋼に比べ
て被削性が大幅に向上しているにもかかわらず、すぐれ
た耐食性を有していることが認められた。
【発明の効果】
以上説明してきたように、この発明に係るヘラター用快
削ステンレス鋼は、重量％で、Ｃ：０．１％以下、Ｓｉ
： １．０％以下、Ｍｎ：２．０％以下、Ｐ：０．１
０％以下、Ｓ二０．４０％以下、Ｃｕ：１．０〜５．０
％、Ｎｉニア、０〜１５．０％、Ｃｒ：１５．０〜２０
．０％、Ｓｅ：０．３０％以下、Ｃａ：０．１０％以下
、Ｂ：０．０５％以下、Ｏ：０．０２％以下、残部Ｆｅ
および不純物よりなる組成を有するものであるから、ヘ
ッダー性（冷間加工性）とステンレス鋼本来の耐食性の
いずれをも害することなく被削性に優れたものであり、
工業的な生産性においても何んら支障をもたらさないヘ
ラグー用快削ステンレス鋼であるという著大なる効果を
もたらしうるものである。(Means for Solving the Problems) The free-cutting stainless steel for headers according to the present invention has a weight percentage of
So, C・0.1% or less, Si・1.0% or less, M n
: 2, 0% or less, p: o, 10% or less, S: 0.4
0% or less, Cu: 1, 0-5, 0%, Ni near, 0-15.0%, Cr: 15.0-20.0%, S
e: 0.30% or less, CaO, 10% or less, B:o
, 05% or less, O. It is characterized by consisting of 0.02% or less, the balance being Fe and impurities, and the composition of free-cutting stainless steel for hengoo with such a composition has been used as a means to solve the conventional problems of 101~1. It is characterized by Next, the reasons for limiting the composition (weight %) of the free-cutting stainless steel for headers according to the present invention will be explained. C: 0.1% or less C is a strong austenite-stabilizing element, but if it is too large, it deteriorates heratility and corrosion resistance, so from this point of view it is set to 0.1% or less. Si: 1.0% or less Si is an element that acts as a defrying agent during melting of steel, and is also a ferrite-forming element, which is also an effective element for improving hot-melting resistance, so it is more desirable to have 0%. The content should be .1% or more, but if it is too large, the flatness and toughness will deteriorate, so the content should be 1.0% or less. Mn: 2, 0% or less Mn is an element that acts as a deoxidizing agent and desulfurizing agent during the melting of steel, and is also an austenitizing element, so it is an effective element for preventing red heat embrittlement. Desirably, the content is 0.5% or more, but since a large amount of content reduces machinability, the content is 2.0% or less. P: 0.10% or less If the P content is too large, hot workability and flatness will be impaired, so it is set to 0.10% or less so that hot workability and flatness are not significantly impaired. S: 0.40% or less If the S content is too high, hot workability and corrosion resistance will decrease, so 0.40% will not significantly decrease hot workability and corrosion resistance.
The following was made. Cu: 1.0-5.0% Cu is an austenite stabilizing element and is an effective element for improving corrosion resistance and oxidation resistance, so it should be contained at 1.0% or more to obtain such effects. However, since containing a large amount impairs hot workability, the content was set at 5.0% or less. Ni: 7.0-15.0% Ni is a basic element of austenitic stainless steel, and is an effective element for forming a stable austenite phase and improving the corrosion resistance and toughness of steel. In order to obtain the effect, the content should be 7.0% or more, but since adding a large amount will reduce the stiffness and increase the cost, the content is limited to 15.0% or less. Cr: 15.0-20.0% Cr is a basic element of austenitic stainless steel, and is an element that contributes to improving corrosion resistance and oxidation resistance. However, if it is contained in a large amount, the bellatar property is reduced, so the content is limited to 20.0% or less. Se: 0.30% or less Se is an effective element for improving the stiffness of austenitic stainless steel, but too much will impair hot workability, so 0.30 will not significantly impair hot workability. %
It was added in the following range. Ca: 0.10% or less Ca is an effective element for improving hot workability and manufacturability of steel materials, so it was added in a range of 0.10% or less. B: 0.05% or less Since B is an effective element for improving hot workability and improving the manufacturability of steel materials, it was added in a range of 0.05% or less. 02 0.02% or less If the O content is too high, a large amount of integrants will form in the steel, which is harmful to corrosion resistance and also reduces hot workability and hardness, so it is set to 0.02% or less. . In addition, Mo5 was added to further improve corrosion resistance.
．． Al is added in a range of 0% or less, Al is added in a range of 1.50% or less for more effective detoxification, Zr is added in a range of 0.5% or less, and Ti is added in an amount of 0.5% or less to improve corrosion resistance and strength.
2.0% or less. Nb 360% or less, ■ 0.5% or less, Ta 0.5
% or less may be added. (Example) Austenitic stainless steel with the chemical composition shown in Table 1 is melted in a 2-ton electric furnace, made into a steel ingot, and then subjected to blooming rolling, wire rod rolling, heat treatment, and wire drawing. A stainless steel wire rod of 9.0 mm was obtained. Next, Example No. of the present invention shown in Table 1, 1.2°3.4
, 5.6 and Comparative Examples Nos. 7 and 8 were examined for machinability. The machinability evaluation test at this time was conducted under the conditions shown in Table 2. The results are shown in FIG. As is clear from the results shown in Table 2 and Figure 1, the drill life speed of the stainless steels of the present invention Nos. 1, 2, 3, 4, 5, and 6 is higher than that of the comparative stainless steels Nos. 7 and 8.
This value was considerably larger than that of the drill life speed, and it was recognized that the machinability was significantly superior. Next, each stainless steel shown in Table 1 (No. 1 to
8) Diameter 6.0mm, length 11.51111m
Cold upsetting was performed on each sample, and the stress (kgf/mm2) and strain (fl n
We investigated the relationship with Ho/H). The results are shown in FIG. As is clear from the results shown in Figure 2, the stainless steels of the present invention Nos. 1.2, 3, 4, and 5.6 exhibited stress-strain characteristics equivalent to those of comparative stainless steels Nos. 7 and 8. Although the stainless steel of the present invention has significantly improved machinability compared to comparative stainless steels, it is recognized that it has excellent cold upsetting properties, that is, excellent header properties. Ta. Furthermore, a corrosion resistance evaluation test using 5% H2SO4 (boiling) and ferric chloride was carried out on each sample with a diameter of 9.0 mm and a length of 100 mm made of each stainless steel (No. 1 to 8) shown in Table 1. , corrosion reduction (g/m2・h
) was evaluated. The results are shown in FIG. As is clear from the results shown in FIG. 3, the stainless steels of the present invention tI4No. 1.2, 3, 4, and 5.6 have almost the same corrosion loss as the comparison stainless steels No. 7 and 8. Although the stainless steel of the present invention has significantly improved machinability compared to comparative stainless steels, it was found to have excellent corrosion resistance. Effects of the Invention As explained above, the free-cutting stainless steel for herator according to the present invention has C: 0.1% or less, Si
: 1.0% or less, Mn: 2.0% or less, P: 0.1
0% or less, S2 0.40% or less, Cu: 1.0 to 5.0
%, Ni near, 0-15.0%, Cr: 15.0-20
．． 0%, Se: 0.30% or less, Ca: 0.10% or less, B: 0.05% or less, O: 0.02% or less, balance Fe
Since it has a composition consisting of stainless steel and impurities, it has excellent machinability without impairing either the header properties (cold workability) or the corrosion resistance inherent to stainless steel.
It is a free-cutting stainless steel for Heragu that does not cause any problems in industrial productivity, and can bring about a significant effect.
第１図は被削性の評価試験結果を示すグラフ、第２図は
冷間加工性（ヘッダー性）の評価試験結果を示すグラフ
、第３図は耐食性の評価試験結果を示すグラフである。
特許出願人 大同特殊鋼株式会社FIG. 1 is a graph showing the results of the machinability evaluation test, FIG. 2 is a graph showing the results of the cold workability (headerability) evaluation test, and FIG. 3 is a graph showing the results of the corrosion resistance evaluation test. Patent applicant: Daido Steel Co., Ltd.
Claims (1)
下、Ｍｎ：２．０％以下、Ｐ：０．１０％以下、Ｓ：０
．４０％以下、Ｃｕ：１．０〜５．０％、Ｎｉ：７．０
〜１５．０％、Ｃｒ：１５．０〜２０．０％、Ｓｅ：０
．３０％以下、Ｃａ：０．１０％以下、Ｂ：０．０５％
以下、Ｏ：０．０２％以下、残部Ｆｅおよび不純物から
なることを特徴とするヘッダー用快削ステンレス鋼。(1) In weight%, C: 0.1% or less, Si: 1.0% or less, Mn: 2.0% or less, P: 0.10% or less, S: 0
．． 40% or less, Cu: 1.0 to 5.0%, Ni: 7.0
~15.0%, Cr:15.0~20.0%, Se:0
．． 30% or less, Ca: 0.10% or less, B: 0.05%
Hereinafter, a free-cutting stainless steel for a header, characterized in that O: 0.02% or less, the balance being Fe and impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63311308A JP2782745B2 (en) | 1988-05-06 | 1988-12-09 | Free-cutting stainless steel for cold working |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11019688 | 1988-05-06 | ||
| JP63-110196 | 1988-05-06 | ||
| JP63311308A JP2782745B2 (en) | 1988-05-06 | 1988-12-09 | Free-cutting stainless steel for cold working |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0250937A true JPH0250937A (en) | 1990-02-20 |
| JP2782745B2 JP2782745B2 (en) | 1998-08-06 |
Family
ID=26449873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63311308A Expired - Fee Related JP2782745B2 (en) | 1988-05-06 | 1988-12-09 | Free-cutting stainless steel for cold working |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2782745B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05320362A (en) * | 1992-05-20 | 1993-12-03 | Nippon Paper Ind Co Ltd | Granulation of water-soluble cellulose derivative |
| JPH0673185A (en) * | 1992-07-10 | 1994-03-15 | Nippon Paper Ind Co Ltd | Method for granulating water-soluble cellulose derivative |
| JPH0673186A (en) * | 1992-07-10 | 1994-03-15 | Nippon Paper Ind Co Ltd | Method for granulating water-soluble cellulose derivative |
| WO2000065120A1 (en) * | 1999-04-26 | 2000-11-02 | Crs Holdings, Inc. | Free-machining austenitic stainless steel |
| CN115466908A (en) * | 2022-09-29 | 2022-12-13 | 浙江青山钢铁有限公司 | Selenium-containing calcium-containing free-cutting stainless steel and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50129423A (en) * | 1974-03-30 | 1975-10-13 |
-
1988
- 1988-12-09 JP JP63311308A patent/JP2782745B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50129423A (en) * | 1974-03-30 | 1975-10-13 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05320362A (en) * | 1992-05-20 | 1993-12-03 | Nippon Paper Ind Co Ltd | Granulation of water-soluble cellulose derivative |
| JPH0673185A (en) * | 1992-07-10 | 1994-03-15 | Nippon Paper Ind Co Ltd | Method for granulating water-soluble cellulose derivative |
| JPH0673186A (en) * | 1992-07-10 | 1994-03-15 | Nippon Paper Ind Co Ltd | Method for granulating water-soluble cellulose derivative |
| WO2000065120A1 (en) * | 1999-04-26 | 2000-11-02 | Crs Holdings, Inc. | Free-machining austenitic stainless steel |
| CN115466908A (en) * | 2022-09-29 | 2022-12-13 | 浙江青山钢铁有限公司 | Selenium-containing calcium-containing free-cutting stainless steel and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2782745B2 (en) | 1998-08-06 |
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