JPS63157833A - Wire rod for production of steel wool - Google Patents
Wire rod for production of steel woolInfo
- Publication number
- JPS63157833A JPS63157833A JP30117286A JP30117286A JPS63157833A JP S63157833 A JPS63157833 A JP S63157833A JP 30117286 A JP30117286 A JP 30117286A JP 30117286 A JP30117286 A JP 30117286A JP S63157833 A JPS63157833 A JP S63157833A
- Authority
- JP
- Japan
- Prior art keywords
- steel wool
- steel
- wire rod
- cutting
- constitution
- 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
- 229910000831 Steel Inorganic materials 0.000 title abstract description 47
- 239000010959 steel Substances 0.000 title abstract description 47
- 210000002268 wool Anatomy 0.000 title abstract description 33
- 238000004519 manufacturing process Methods 0.000 title abstract description 12
- 229910001563 bainite Inorganic materials 0.000 claims abstract description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 11
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 abstract description 29
- 239000000126 substance Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 9
- 239000000203 mixture Substances 0.000 description 5
- 229910001562 pearlite Inorganic materials 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910000734 martensite Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000915 Free machining steel Inorganic materials 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910001678 gehlenite Inorganic materials 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、スチールウール製造用線材に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a wire rod for producing steel wool.
［従来技術およびその問題点］
スチールウールは、通常、低炭素鋼線材を伸線加工後、
長手方向に切削して製造されており、たわしとして一般
台所用品磨き用、さび取り用、ぺインド除去用などに用
いられるほか、最近はディスクブレーキ用や合成樹脂と
の複合材料にも使用され、その需要は増大しつ５ある。[Prior art and its problems] Steel wool is usually produced by drawing low carbon steel wire.
Manufactured by cutting in the longitudinal direction, it is used as a scrubber for polishing general kitchen utensils, removing rust, removing paint, etc. Recently, it has also been used for disc brakes and composite materials with synthetic resin. The demand is increasing5.
スチールウール製造用線材に要求される特性をあげると
次のようになる。The characteristics required for steel wool manufacturing wire are as follows.
（１）切削工具の寿命が長いこと。(1) The cutting tool has a long life.
（２）切削時に微細な粉や屑の発生が少なく、歩留りが
高いこと。(2) There is little generation of fine powder and debris during cutting, and the yield is high.
（３）スチールウール自体が適度の弾力性と強度を有す
ること。(3) Steel wool itself has appropriate elasticity and strength.
スチールウールは、前記の通り、切削によって製造され
るため、スチールウール製造用線材には良好な被削性、
すなわち（１）で示したような工具寿命の長いことが要
求される。また、通常の切削加工とスチールウール切削
加工の著しい相違は、前者において切り屑となる部分を
後者ではスチールウールとして利用する点にあり、スチ
ールウールとなる切り屑はカールすることなく、安定し
た大きさと形状で連続して切削できることが必須条件で
ある。さらに、通常の切削加工では望ましいとされてい
る極微細な粉や屑（以下、極微切削屑という）の発生も
、スチールウールの製造においては歩留りを低下させ、
かつ作業環境を汚染するために、最／Ｊ−限に抑制する
ことが重要である。このため、被剛性を向上させるため
に種々の元素を添加した既存の快削鋼はスチールウール
製造用線材には利用できない。As mentioned above, steel wool is manufactured by cutting, so the wire rod for steel wool manufacturing has good machinability and
That is, a long tool life as shown in (1) is required. In addition, the remarkable difference between normal cutting and steel wool cutting is that the parts that become chips in the former are used as steel wool in the latter, and the chips that become steel wool do not curl and have a stable size. The essential condition is that it can be cut continuously in a straight shape. Furthermore, the generation of ultrafine powder and debris (hereinafter referred to as ultrafine cutting debris), which is considered desirable in normal cutting processes, also reduces the yield in steel wool production.
In addition, it is important to minimize the risk of contaminating the working environment. For this reason, existing free-cutting steels to which various elements are added to improve stiffness cannot be used as wire rods for producing steel wool.
現在スチールウール製造用線材としてはＰやＮを高めた
もの（特公昭５０−１４２１２号公報、米国特許３３８
７９６８） 、さらにこれにＳとＣａを複合添加したも
の（特開昭５５−６４３７号公報）が提案されている。Currently, wire rods for producing steel wool with high P and N content (Japanese Patent Publication No. 14212/1983, U.S. Patent No. 338
7968), and a compound in which S and Ca are added in combination (Japanese Unexamined Patent Publication No. 55-6437) has been proposed.
−刃鋼組成以外に鋼中の非金属介在物の組成と量を制御
する方法も公表されている（特開昭５３−５４１１４号
公報、特開昭６０−２４３４７号公報）。またスチール
ウールの製造においては、幅が２０〜１２０μｍのきわ
めて細い連続した帯状の切り屑を切削加工によって切り
出していくため、素材である鋼線材には材質上の均一さ
が強く要求される。このため、スチールウール製造用線
材は非金属介在物の形態や量の制御に加えて組織の均一
さに関して十分な配慮がなされねばならない。このため
、従来は線材をエアパテンティングすることにより、フ
ェライトとパーライトからなる均一な組織とすることが
多かった（特公昭５０−１４２１２号公報、特開昭５３
−５４１１４号公報）。- In addition to the blade steel composition, methods for controlling the composition and amount of nonmetallic inclusions in steel have also been published (Japanese Patent Application Laid-Open Nos. 53-54114 and 60-24347). In addition, in the production of steel wool, very thin continuous band-shaped chips with a width of 20 to 120 μm are cut out by cutting, so the steel wire material used as the raw material is strongly required to be uniform in quality. For this reason, in wire rods for producing steel wool, sufficient consideration must be given to the uniformity of the structure in addition to controlling the form and amount of nonmetallic inclusions. For this reason, in the past, wire rods were often air-patented to create a uniform structure consisting of ferrite and pearlite (Japanese Patent Publication No. 14212/1983,
-54114).
［発明が解決しようとする問題点］
上記の従来の線材はいずれも工具寿命を長くする効果が
あるもの＼、極微切削屑の発生量の点では限界があり、
なお改善の余地が大きいという問題があり、上記のエア
パテンティングによるフェライトとパーライトの混合組
織では組織の均一性という点ではまだ不十分であるとい
う問題がある。[Problems to be solved by the invention] All of the above-mentioned conventional wire rods have the effect of extending tool life, but they have a limit in terms of the amount of microscopic cutting chips generated.
However, there is a problem that there is a large room for improvement, and the problem is that the mixed structure of ferrite and pearlite created by air patenting is still insufficient in terms of the uniformity of the structure.
本発明は、従来のスチールウール製造用材料では達成さ
れなかった極微切削屑の大幅な低減を安定して実現させ
るための新規なスチールウール製造用線材を提供するこ
とを目的とする。An object of the present invention is to provide a novel steel wool manufacturing wire material that can stably achieve a significant reduction in microscopic cutting waste, which has not been achieved with conventional steel wool manufacturing materials.
本発明は、鋼の化学成分に加えて、その組織を制御する
ことを特徴とするスチールウール製造用線材である。The present invention is a wire rod for producing steel wool, which is characterized by controlling the chemical composition of steel as well as its structure.
［問題点を解決するための手段］
すなわち本発明は、
Ｃ： ０，０３−０．２５％ 、 Ｓｉ ： ０．００
５〜０．３０％、Ｍｎ：０．２〜１．５％、Ｐ：０．１
２％以下、Ｓ：０．０２％以下。[Means for solving the problems] That is, the present invention has the following characteristics: C: 0.03-0.25%, Si: 0.00
5-0.30%, Mn: 0.2-1.5%, P: 0.1
2% or less, S: 0.02% or less.
Ｎ ： ０．００３〜０．０１２％、 Ｏ： ０．００
３〜０．０３％、Ｃａ：ｏ、ｏｏｏｓ〜０．００３５％
。N: 0.003-0.012%, O: 0.00
3~0.03%, Ca:o,ooos~0.0035%
.
を基本成分とし、必要に応じてＢ ： ０．０００３〜
０．００３０％を含み、さらに組織がベイナイトあるい
はベイナイトとフェライトの混合組織であることを特徴
とするスチールウール製造用線材である。is the basic component, and if necessary, B: 0.0003~
0.0030%, and the structure is a bainite or a mixed structure of bainite and ferrite.
［作用コ ゛ 次に本発明の成分限定理由について説明する。［Action ゛ Next, the reason for limiting the components of the present invention will be explained.
Ｃはスチールウールに適当な強度と弾力性を与えるため
に不可欠の成分であるため０．０２％以上加えるが、０
．２５％を越えるとベイナイト組織中に延性の乏しいマ
ルテンサイトが混じるために極微切削屑が増加する。こ
れよりＣ量の上限は０．２５％とする。ＳＬは鋼の脱酸
上必須の元素であるため０．００５％以上加えるが、０
．３０％を越えるとスチールウールが脆くなり、また極
微切削屑の発生も増大する。C is an essential component to give steel wool appropriate strength and elasticity, so it is added at least 0.02%, but 0.02% or more is added.
．． When it exceeds 25%, martensite with poor ductility is mixed in the bainite structure, resulting in an increase in the amount of fine cutting chips. From this, the upper limit of the amount of C is set to 0.25%. SL is an essential element for deoxidizing steel, so 0.005% or more is added, but 0.005% or more is added.
．． If it exceeds 30%, the steel wool becomes brittle and the generation of microscopic cutting chips increases.
したがって上限を０．３０％とした。Therefore, the upper limit was set at 0.30%.
Ｍｎは鋼の脱酸元素として、またＳに起因する熱間脆性
を防止するために不可欠であり、０．２％以上加える。Mn is essential as a deoxidizing element for steel and for preventing hot embrittlement caused by S, and is added in an amount of 0.2% or more.
−古本発明の特徴をなすところの線材の組織に関してい
えば、ベイナイトを安定して生せしめるためにはＭ ｎ
ｆｋは多いほど好ましいが、１゜５％を越えるとマル
テンサイトの発生傾向が高くなるため１．５％を上限と
した。- Regarding the structure of the wire rod, which is a feature of the old invention, in order to produce bainite stably, M n
The higher fk is, the more preferable it is, but if it exceeds 1.5%, the tendency for martensite to occur increases, so 1.5% is set as the upper limit.
Ｐは鋼の不可避的不純物であるが、スチールウールの表
面性状を平滑化する効果があるため若干添加するが、０
．１２％を越えるとスチールウールが脆くなるため０．
１２％を上限とする。P is an unavoidable impurity in steel, but it is added to a small amount because it has the effect of smoothing the surface texture of steel wool.
．． If it exceeds 12%, the steel wool becomes brittle, so it should be 0.
The upper limit is 12%.
Ｎは通常快削鋼で多量に使用され、スチールウール製造
用線材でもＮを高めているが、０．０１２％を越えると
スチールウールが脆くなり、極微切削屑の発生が増加す
る。このため、Ｎの上限は０．０１２％とした。一方０
．００３％未満ではスチールウールの表面性状が悪く平
滑性が損われるため、下限を０．００３％とした。A large amount of N is normally used in free-cutting steel, and N is also increased in wire rods for producing steel wool, but if it exceeds 0.012%, the steel wool becomes brittle and the generation of microscopic cutting chips increases. Therefore, the upper limit of N was set to 0.012%. On the other hand 0
．． If it is less than 0.003%, the surface properties of the steel wool will be poor and the smoothness will be impaired, so the lower limit was set at 0.003%.
Ｃａは鋼中のＯと反応してＣａＯを主体とした非金属介
在物、すなわちゲーレナイト（２ＣａＯ・ＡＱ□○、
・Ｓｉｎ、）からランキナイト（３Ｃａ０ ・２ＳｉＯ
，）の組成に近い介在物を形成し、それらが微細かつ均
一に分散している必要がある。このため鋼中の０量は０
．００３％以上、０．０３％以下とする。このようなＣ
ａＯを主体とする微細介在物は極微切削屑の低減に有効
であるが、Ｃａが０．０００５％未満では効果がなく、
逆に０．００３５％を越えて添加することは現在の技術
では製造困難である。このためＣａ添加量は０．０００
５〜０．００３５％とした。一方共存するＳが多いとき
は、Ｃａ Ｏの周囲にＣａＳが析出したＣａＯ−Ｃａ５
型介在物となるため、Ｃａは十分その効果を発揮し得な
いばかりか、ＭｎＳを多量に生成するため連続したスチ
ールウールが得られなくなる。このためＳ量は低いほど
好ましく、０．０２％を上限とした。Ｂは焼入性向上効
果が著しいため、本発明のようにベイナイトを主体とし
た組織を得るためには有効である。Ｂは０．０００３％
未満では効果がなく一方、０．００３０％を越えても効
果は飽和するため、それぞれを下限および上限とした。Ca reacts with O in steel to form nonmetallic inclusions mainly composed of CaO, namely gehlenite (2CaO・AQ□○,
・Sin, ) to rankinite (3Ca0 ・2SiO
, ), and they must be finely and uniformly dispersed. Therefore, the amount of 0 in steel is 0
．． 0.003% or more and 0.03% or less. C like this
Fine inclusions mainly composed of aO are effective in reducing ultrafine cutting debris, but they are not effective when Ca content is less than 0.0005%.
On the other hand, adding more than 0.0035% is difficult to manufacture using current technology. Therefore, the amount of Ca added is 0.000
The content was set at 5% to 0.0035%. On the other hand, when there is a large amount of coexisting S, CaS precipitates around CaO and CaO-Ca5
Since Ca becomes mold inclusions, not only is Ca not sufficiently effective, but also a large amount of MnS is generated, making it impossible to obtain continuous steel wool. Therefore, the lower the amount of S, the better, and the upper limit was set at 0.02%. Since B has a remarkable effect of improving hardenability, it is effective for obtaining a structure mainly composed of bainite as in the present invention. B is 0.0003%
If it is less than 0.0030%, there is no effect, but if it exceeds 0.0030%, the effect is saturated, so these were set as the lower and upper limits, respectively.
本発明者らは、以下に述べる線材の組織が切削屑の発生
におよぼす影響を多くの基礎研究により解明し、その結
果として、線材の組織を制御することにより、極微切削
屑の発生が大幅に減少する事実を発見した。すなわち第
１表の試料を用いて、極微切削屑の発生量におよぼす組
織の影響を調べた。その結果は第２表に示すように、従
来のスチールウール製造用線材の特徴であったフェライ
トとパーライトの混合組織にくらべて、ベイナイトある
いはベイナイトにフェライトが混在した組織の方がはる
かに極微切削屑の発生が少ない。これは、フェライト中
にパーライトが存在した場合、切削時、フェライトにく
らべて相対的にかたいパーライト粒が切欠効果を生じ、
このため切削面のむしれと極微切削屑が発生するのに対
して、ベイナイトを主体とした組織では、ミクロ的な均
一性が高いために切欠効果が生じにくいことによる。The present inventors have elucidated the influence of the wire structure described below on the generation of cutting chips through a number of basic studies, and as a result, by controlling the structure of the wire rod, the generation of microscopic cutting chips can be significantly reduced. I discovered the fact that it is decreasing. That is, using the samples shown in Table 1, the influence of the structure on the amount of microscopic cutting debris generated was investigated. As shown in Table 2, the results show that compared to the mixed structure of ferrite and pearlite, which is characteristic of conventional wire rods for steel wool production, the structure of bainite or a structure of bainite mixed with ferrite produces much finer cutting chips. occurrence is low. This is because when pearlite exists in ferrite, the pearlite grains, which are relatively hard compared to ferrite, create a notch effect during cutting.
For this reason, peeling of the cut surface and microscopic cutting chips occur, whereas in a structure mainly composed of bainite, the microscopic uniformity is high, so the notch effect does not easily occur.
したがって、組織はベイナイト単相であることが望まし
い。Therefore, it is desirable that the structure is a single bainite phase.
フェライトが混入する場合、フェライトはベイナイトに
くらべて軟質であるので、第２表が示すよ第 １ 表
試料の化学成分
うに約４０％以下では極微切削屑の発生量に大きな影響
をおよぼすことはないが、４０％を越えると極微切削屑
は急増する。マルテンサイトは硬質であるため、第２表
に示すようにきわめて有害である。When ferrite is mixed in, Table 2 shows that ferrite is softer than bainite.Table 1
If the chemical composition of the sample is less than about 40%, it will not have a significant effect on the amount of microscopic cutting debris, but if it exceeds 40%, the amount of microscopic cutting debris will increase rapidly. Since martensite is hard, it is extremely harmful as shown in Table 2.
このため線材圧延後の冷却は５００℃前後まで急冷し、
その後恒温保持することが望ましい。したがって線材を
鉛パテンテイング、ソルトパテンティング、あるいは流
動層パテンティングする方法により良好な結果が得られ
る。For this reason, the cooling after rolling the wire rod is rapidly cooled to around 500℃,
After that, it is desirable to keep the temperature constant. Therefore, good results can be obtained by subjecting the wire to lead patenting, salt patenting, or fluidized bed patenting.
［実施例］
第３表のＮｏ１〜１７に示す化学成分の鋼をそれぞれ転
炉で溶製後、鋼塊法ないしは連続鋳造法によりビレット
を製造した。次いでビレットを加熱炉で１１００℃に加
熱し、ひきつりき線材圧延と調整冷却を行った。調整冷
却は溶融塩冷却により行った。[Example] Steels having chemical compositions shown in Nos. 1 to 17 in Table 3 were each melted in a converter, and then billets were manufactured by a steel ingot method or a continuous casting method. Next, the billet was heated to 1100° C. in a heating furnace, and subjected to twitch wire rolling and controlled cooling. Controlled cooling was performed by molten salt cooling.
浴温は３５０〜５３０℃、浸漬時間は４０〜８０ｓｅｃ
とした。Bath temperature is 350-530℃, immersion time is 40-80 seconds
And so.
線材を酸洗および潤滑処理後所定のサイズまで伸線した
。After pickling and lubrication, the wire rod was drawn to a predetermined size.
スチールウール切削時の工具材質は、高速度鋼およびＴ
ｉＣを含む超硬合金（Ｐ種）を用い、また切削速度は１
６０ｍ／ｍｉｎとした。The tool materials used for cutting steel wool are high-speed steel and T.
A cemented carbide containing iC (P type) was used, and the cutting speed was 1.
The speed was set at 60 m/min.
第３表でＮ００１〜３はＣの影響を、Ｎｏ、４〜６はＳ
ｉの影響を、Ｎ ｏ 、 ７〜９はＭｎの影響を、Ｎｏ
、１０〜１２はＣａの影響を、そして、Ｎｏ、１３〜１
５はＮの影響を調べたものである。なおＮｏ、２，５，
１１．および１４にはＢを添加した。Ｎｏ、１６および
Ｎｏ、１７は比較鋼であり、前者は高Ｐ系、後者は低Ｐ
−Ｃａ系の従来のスチールウール製造用線材の一例であ
る。In Table 3, No. 001-3 are affected by C, No. 4-6 are S.
7 to 9 are the influence of Mn, No.
, 10-12 are affected by Ca, and No. 13-1
5 investigates the influence of N. In addition, No, 2, 5,
11. and 14, B was added. No. 16 and No. 17 are comparative steels, the former being high P type and the latter being low P type.
- This is an example of a conventional wire rod for producing steel wool based on Ca.
第３表が示すように、本発明によれば極微切削屑の発生
率は大幅に低下する。As shown in Table 3, according to the present invention, the generation rate of microscopic cutting debris is significantly reduced.
また２本発明の線材を用いて製造されたスチールウール
はいずれも良好な特性を示す。Furthermore, both steel wools produced using the wire rods of the present invention exhibit good properties.
［発明の効果］
以上述べたように、本発明によれば、極微切削屑発生量
を著しく低減できるため、スチールウールの製造におい
て、歩留りの向上と作業環境の改善をはかることが可能
となった。[Effects of the Invention] As described above, according to the present invention, the amount of microscopic cutting waste generated can be significantly reduced, making it possible to improve the yield and the working environment in the production of steel wool. .
Claims (1)
％Ｍｎ：０．２〜１．５％Ｃａ：０．０００５〜０．０
０３５％Ｐ：０．１２％以下Ｓ：０．０２％以下 Ｎ：０．００３〜０．０１２％Ｏ：０．００３〜０．０
３％を基本成分とし、必要に応じてＢ：０．０００３〜
０．００３０％を含み、さらに組織がベイナイトあるい
はベイナイトとフェライトの混合組織であることを特徴
とするスチールウール製造用線材。[Claims] C: 0.03-0.25% Si: 0.005-0.30
%Mn: 0.2~1.5%Ca: 0.0005~0.0
035% P: 0.12% or less S: 0.02% or less N: 0.003-0.012% O: 0.003-0.0
3% as the basic component, B: 0.0003~ as necessary
0.0030%, and further characterized in that the structure is bainite or a mixed structure of bainite and ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61301172A JPH0745700B2 (en) | 1986-12-19 | 1986-12-19 | Wire rod for steel wool manufacturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61301172A JPH0745700B2 (en) | 1986-12-19 | 1986-12-19 | Wire rod for steel wool manufacturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63157833A true JPS63157833A (en) | 1988-06-30 |
| JPH0745700B2 JPH0745700B2 (en) | 1995-05-17 |
Family
ID=17893657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61301172A Expired - Lifetime JPH0745700B2 (en) | 1986-12-19 | 1986-12-19 | Wire rod for steel wool manufacturing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0745700B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275252A (en) * | 2008-05-13 | 2009-11-26 | Nippon Steel Corp | Steel wire rod excellent in cold forgeability after annealing, and method for production thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0564229A (en) * | 1991-08-30 | 1993-03-12 | Fuji Photo Film Co Ltd | Picture processor and method |
-
1986
- 1986-12-19 JP JP61301172A patent/JPH0745700B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0564229A (en) * | 1991-08-30 | 1993-03-12 | Fuji Photo Film Co Ltd | Picture processor and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275252A (en) * | 2008-05-13 | 2009-11-26 | Nippon Steel Corp | Steel wire rod excellent in cold forgeability after annealing, and method for production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0745700B2 (en) | 1995-05-17 |
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|---|---|---|---|
| EXPY | Cancellation because of completion of term |