JPS6362843A - Electrogalvanized baling hoop having high strength - Google Patents
Electrogalvanized baling hoop having high strengthInfo
- Publication number
- JPS6362843A JPS6362843A JP20875286A JP20875286A JPS6362843A JP S6362843 A JPS6362843 A JP S6362843A JP 20875286 A JP20875286 A JP 20875286A JP 20875286 A JP20875286 A JP 20875286A JP S6362843 A JPS6362843 A JP S6362843A
- Authority
- JP
- Japan
- Prior art keywords
- hoop
- electrogalvanized
- baling
- strength
- steel sheet
- 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
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 3
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 3
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 3
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 229910000831 Steel Inorganic materials 0.000 abstract description 32
- 239000010959 steel Substances 0.000 abstract description 32
- 238000005452 bending Methods 0.000 abstract description 21
- 239000000126 substance Substances 0.000 abstract description 9
- 239000010960 cold rolled steel Substances 0.000 abstract description 7
- 229910000734 martensite Inorganic materials 0.000 abstract description 6
- 239000000203 mixture Substances 0.000 abstract description 3
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- 229920000742 Cotton Polymers 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 abstract description 2
- 238000004806 packaging method and process Methods 0.000 abstract description 2
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 2
- 210000002268 wool Anatomy 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 238000007747 plating Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010949 copper Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 206010034972 Photosensitivity reaction Diseases 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000036211 photosensitivity Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Electroplating Methods And Accessories (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、原綿、羊毛、鋼材等の梱包に用いられる電気
亜鉛めっきしたベーリングフープに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrogalvanized baling hoop used for packaging raw cotton, wool, steel, etc.
（従来の技術）
従来、ブルーイング処理して、その表裏面に美麗な酸化
スケールを生成させたベーリングフープ（以下、単にフ
ープという。）が広く梱包資材として用いられているが
、最近、ブルーイングに代わって、塗装やめつき処理、
特に、電気亜鉛めっきしたフープが使用時の耐誘性や商
品価値等にすぐれるために用いられるに至っている。(Prior art) Baling hoops (hereinafter simply referred to as hoops), which have been subjected to bluing treatment to produce beautiful oxide scales on their front and back surfaces, have been widely used as packaging materials. Instead of painting and glazing treatment,
In particular, electrogalvanized hoops have come to be used because of their excellent resistance to induction during use and their commercial value.
引張強さ１３０ ｋｇｆ／＋ｎｍ”以上の高強度フープ
に要求される主な特性は、長標点間距離の引張試験にお
けるすぐれた伸びと曲げ加工性である。しかし、素材冷
延鋼板がこれらの性質にすぐれている場合でも、電気亜
鉛めっきしたフープは、これらの特性に劣ることが知ら
れている。例えば、製品仕様として、曲げ半径３１ｍで
の９０°繰り返し曲げが４回以上要求される場合、繰り
返し曲げを６回以上行ない得る１ ４０ｋｇｆ／ｍｍ”
級無処理フープに目付量表裏回答１０ ｇ／ｍとした電
気亜鉛めっきを施したとき、繰り返し曲げ回数が２回に
も激減し、製品仕様を満たさないことがある。この原因
は明らかではないが、亜鉛等を含むめっき層は、水素の
拡散を著しく抑制するといわれているので、電気亜鉛め
っきを施すことによって、鋼中の水素の散逸が妨げられ
る結果、銅が劣化する所謂水素脆化が関係しているとみ
られる。The main properties required for a high-strength hoop with a tensile strength of 130 kgf/+nm or more are excellent elongation and bending workability in long gauge length tensile tests. Electrogalvanized hoops are known to be inferior in these properties even when they have excellent properties. For example, when product specifications require 90° repeated bending at a bending radius of 31 m four or more times. , 140kgf/mm” that can be repeatedly bent 6 times or more
When an untreated hoop is subjected to electrogalvanizing with a basis weight of 10 g/m, the number of repeated bends is drastically reduced to 2, and the product specifications may not be met. The cause of this is not clear, but it is said that a plating layer containing zinc etc. significantly suppresses the diffusion of hydrogen, so electrogalvanizing prevents the dissipation of hydrogen in the steel, causing the copper to deteriorate. This appears to be related to so-called hydrogen embrittlement.
更に、フープは、よく知られているように、その先端部
において、剪断切抜きによる裏面側に隆起する切目が長
手方向に沿って所定の間隔をおいて多数形成され、後端
部においては、反対に表面側に隆起する切目が長手方向
に沿って所定の間隔をおいて多数形成されて、かかる切
欠付き継手によって結束されることが多い。従って、フ
ープには、この切欠付き継手の重ね合わせによる接合部
の引張強さの高いことも必要であり、一般に、フープの
引張強さに対するこの継手の引張強さの比（以下、切欠
強度比という。）が０．７５以上であることが必要とさ
れている。Furthermore, as is well known, the hoop has a large number of protruding cuts on the back side by shear cutouts at the tip thereof at predetermined intervals along the longitudinal direction, and at the rear end, there are A large number of notched notches are formed along the longitudinal direction at predetermined intervals, and the joints are often bound by such a notched joint. Therefore, the hoop must also have a high tensile strength at the joint formed by overlapping the notched joints, and in general, the ratio of the tensile strength of this joint to the hoop's tensile strength (hereinafter referred to as notch strength ratio) is required. ) is required to be 0.75 or more.
以上のように、フープには、伸び及び曲げ加工性にすぐ
れるほか、大きい切欠強度比等が要求されるが、従来、
これらの特性を考慮したフープ用鋼板の冶金学的見地か
らの研究は殆どなされていない。As mentioned above, hoops are required to have excellent elongation and bending workability as well as a large notch strength ratio.
There has been almost no research conducted on steel plates for hoops from a metallurgical standpoint, taking these characteristics into consideration.
（発明の目的）
本発明者らは、電気亜鉛めっきしたフープにおける上記
した問題を解決するために鋭意研究した結果、鋼の化学
成分及び組織を適正に規制することによって、複合組織
冷延鋼板の電気亜鉛めっきに伴う伸び及び曲げ加工性の
低下を著しく抑制し得ることを見出して、本発明に至っ
たものである。(Objective of the Invention) As a result of intensive research to solve the above-mentioned problems in electrogalvanized hoops, the present inventors have discovered that by appropriately regulating the chemical composition and structure of steel, a cold-rolled steel sheet with a composite structure can be produced. The present invention was achieved by discovering that the reduction in elongation and bending workability caused by electrogalvanizing can be significantly suppressed.
従って、本発明は、曲げ加工性にすぐれる電気亜鉛めっ
きした高強度フープを提供することを目的とする。Accordingly, it is an object of the present invention to provide a high-strength electrogalvanized hoop with excellent bendability.
（発明の構成）
本発明による電気亜鉛めっきしたベーリングフープは、
重量％で
Ｃ０．１０〜０．２５％、
Ｓｉ１．０〜２．３％、及び
Ｍｎ １．０〜３．０％を含有し、且つ、Ｓ ｉ ／
Ｍ ｎ重量比≧０．５を満たし、残部鉄及び不可避的
不純物よりなり、面積率にて８０％以上のマルテンサイ
トを含有することを特徴とし、かかる鋼板は、切欠強度
比が０．８以上、引張強さが１３０ｋｇｆ／ｍｍ”以上
である。(Structure of the Invention) The electrogalvanized baling hoop according to the present invention comprises:
Contains 0.10 to 0.25% of C, 1.0 to 2.3% of Si, and 1.0 to 3.0% of Mn in weight%, and S i /
The steel plate is characterized by satisfying Mn weight ratio ≧0.5, the balance being iron and unavoidable impurities, and containing martensite in an area ratio of 80% or more, and such a steel plate has a notch strength ratio of 0.8 or more. , the tensile strength is 130 kgf/mm” or more.
先ず、化学成分量の種々異なる０、 ７ ＊＊厚１４０
ｋｇｆ／ｍｍ”級複合組織冷延鋼板を水焼入れ型連続焼
鈍をシミュレートしたソルトバス熱処理によって製造し
た後、表裏面の各目付量１０ ｇ／ｒｙ？として、電気
亜鉛めっきを行なって、これに伴う伸び及び曲げ加工性
の変化を調べた。結果を第１表に示す。First of all, 0, 7 ** Thickness 140 with different amounts of chemical components.
kgf/mm" grade composite structure cold-rolled steel sheet was manufactured by salt bath heat treatment simulating water quenching type continuous annealing, and then electrogalvanized with a basis weight of 10 g/ry? on the front and back surfaces. The accompanying changes in elongation and bending workability were investigated.The results are shown in Table 1.
いずれの鋼板も、電気亜鉛めっき処理によって、伸び及
び曲げ加工性が劣化する。高Ｃ量低Ｓｉ量鋼板Ａは、め
っき前に既に伸び及び曲げ加工性が悪い、これに対して
、Ｃ量を低減した鋼板Ｃは延性が改善され、めっき後の
特性も若干改善されるが、尚、曲げ加工性は十分ではな
い。高Ｃ高Ｓｉ鋼板Ｂは、めっき前に比較的すぐれた伸
びを有するが、めっき後の曲げ加工性の劣化が著しい。The elongation and bending workability of any steel sheet deteriorates due to the electrogalvanizing treatment. Steel plate A with high C content and low Si content already has poor elongation and bending properties before plating, whereas steel plate C with reduced C content has improved ductility and properties after plating, but However, the bending workability is not sufficient. The high C high Si steel plate B has relatively good elongation before plating, but the bending workability after plating deteriorates significantly.
しかし、鋼板Ｂに対して、ｃｌを低減し、Ｍｎ量を若干
増加した鋼板りはすぐれた延性を有し、めっき後にもこ
れを保持して、伸び及び曲げ加工性にもすぐれる。However, compared to steel plate B, a steel plate with reduced Cl and slightly increased Mn content has excellent ductility, retains this even after plating, and has excellent elongation and bending workability.
従って、伸び及び曲げ加工性にすぐれる電気亜鉛めっき
したフープを得るには、素材冷延鋼板にすぐれた延性を
付与すると共に、鋼の化学成分としては、Ｃ及びＭｎ量
を比較的少なくし、Ｓｉ量を比較的多くすることが望ま
しいことが示される。Therefore, in order to obtain an electrogalvanized hoop with excellent elongation and bending workability, the cold-rolled steel sheet material should have excellent ductility, and the chemical components of the steel should include relatively low amounts of C and Mn. It is shown that it is desirable to increase the amount of Si relatively.
本発明者らは、複合組織冷延鋼板に電気亜鉛めっきした
１ ３０ｋｇｆ／１１１１”級フープについて、添加合
金元素量の影響を詳細に研究すると共に、組織の影響に
ついても鋭意研究した結果、元素量及び組織を適正に規
制することによって、すぐれた曲げ加工性を有する電気
亜鉛めっきフープを得ることができることを見出して、
本発明を完成したものである。The present inventors conducted a detailed study on the influence of the amount of added alloying elements on a 130 kgf/1111'' class hoop made of electrogalvanized cold-rolled steel sheet with a composite structure, and as a result of intensive research on the influence of the structure, the amount of elements and found that by properly controlling the structure, it is possible to obtain an electrogalvanized hoop with excellent bending workability,
This completes the present invention.
次に、本発明による高強度フープにおける化学成分の限
定理由について説明する。Next, the reason for limiting the chemical components in the high-strength hoop according to the present invention will be explained.
Ｃは、鋼板の強度を確保するために必要な元素であって
、０．１０％よりも少ないときは、引張強さ１３０ｋｇ
ｆ／ｍｍｚ以上を得ることが困難である。C is an element necessary to ensure the strength of the steel plate, and when it is less than 0.10%, the tensile strength is 130 kg.
It is difficult to obtain f/mmz or higher.
しかし、０．２５％を越えるときは、高強度化は達成し
得ても、伸びや曲げ加工性が著しく劣化する。However, when it exceeds 0.25%, although high strength can be achieved, elongation and bending workability deteriorate significantly.
従って、本発明においては、Ｃの添加量は０．１０〜０
．２５％の範囲とする。Therefore, in the present invention, the amount of C added is 0.10 to 0.
．． The range is 25%.
Ｓｉは、１．０％よりも少ないときは、電気亜鉛めっき
後に鋼板の延性が著しく低下し、他方、２゜３％を越え
て過多に添加するときは、製造費用の上昇が大きいほか
、スラブの割れ感光性が高まる。When Si is less than 1.0%, the ductility of the steel sheet decreases significantly after electrogalvanizing.On the other hand, when Si is added in excess of 2.3%, manufacturing costs increase significantly and the slab Increases cracking photosensitivity.
更に、本発明においては、Ｓｉ／Ｍｎ重量比が０゜５以
上であることを必要とする。Ｓ ｉ ／ Ｍ ｎ重量比
が０．５よりも小さいときも、電気亜鉛めっき後に鋼板
の延性が著しく低下するからである。Furthermore, the present invention requires that the Si/Mn weight ratio be 0.5 or more. This is because when the S i /M n weight ratio is smaller than 0.5, the ductility of the steel sheet decreases significantly after electrogalvanizing.
Ｍｎは、鋼板の強度を確保するために必要な元素である
。添加量が１．０％よりも少ないときは、引張強さ１３
０ｋｇｆ／ｍａ＋”以上を得るためには、その他の合金
元素の添加を必要として、製造費用を上昇させる。しか
し、３．０％よりも多いときは、鋼のバンド組織が強く
なり、伸び及び曲げ加工性が低下する。Mn is an element necessary to ensure the strength of the steel plate. When the amount added is less than 1.0%, the tensile strength is 13
In order to obtain 0 kgf/ma+" or more, it is necessary to add other alloying elements, which increases manufacturing costs. However, when the amount is more than 3.0%, the band structure of the steel becomes strong, making it difficult to stretch and bend. Processability decreases.
本発明においては、鋼には上記した元素に加えて、必要
に応じて、Ｐ、Ｃｕ、Ｃｒ、Ｎｉ５Ｍｏ。In the present invention, in addition to the above-mentioned elements, the steel contains P, Cu, Cr, and Ni5Mo as necessary.
Ｔｉｓ Ｎｂ、Ｖ及びＢよりなる群から選ばれる少なく
とも１種の元素を添加することができる。At least one element selected from the group consisting of TisNb, V, and B can be added.
Ｐは、鋼の強化及び耐食性の向上のために添加されるが
、０．１％を越えて過多に添加するときは、鋼の脆化が
著しくなるので、添加量は００１％以下の範囲とする。P is added to strengthen steel and improve corrosion resistance, but if added in excess of 0.1%, the steel will become significantly brittle, so the amount added should be within 0.01%. do.
Ｃｒｓ Ｎｉ、Ｃｕ及びＭｏも、いずれも鋼の強化及び
耐食性の向上環のために添加される。しかし、これらの
元素は、ＣＪｐＰに比べて高価であり、多量の添加は好
ましくないので、添加量は０．５０％を上限とする。Crs Ni, Cu and Mo are also added to strengthen the steel and improve corrosion resistance. However, these elements are more expensive than CJpP, and it is not preferable to add them in large amounts, so the upper limit of the amount added is 0.50%.
Ｔｉ、Ｎｂ及び■は、少量にて鋼の強化に効果を有する
が、０．１０％を越える過多量を添加しても、上記効果
が飽和し、経済性の点からも好ましくないので、添加量
の上限を０．１０％とする。Ti, Nb, and ■ have the effect of strengthening steel in small amounts, but if they are added in an excessive amount exceeding 0.10%, the above effects will be saturated, and this is not preferable from an economic point of view, so they should not be added. The upper limit of the amount is 0.10%.
Ｂは、微量の添加にて鋼の焼入れ性を高める効果を有し
、鋼の強度上昇に有利であるが、添加量が０．００６％
を越えるときは、鋼の曲げ加工性を劣化させるので、添
加量は０．００６％を上限とする。B has the effect of increasing the hardenability of steel when added in a small amount, and is advantageous in increasing the strength of steel, but when added in an amount of 0.006%
If it exceeds the above, the bending workability of the steel will deteriorate, so the upper limit of the amount added is 0.006%.
更に、本発明においては、鋼の局部変形能を高めるため
に、鋼にＺｒ、Ｃａ、ＲＥＭ等を必要に応じて添加して
もよい。Furthermore, in the present invention, Zr, Ca, REM, etc. may be added to the steel as necessary in order to enhance the local deformability of the steel.
本発明によるフープは、上記した化学成分を有すると共
に、電気亜鉛めっきを施しても、所要の曲げ加工性を確
保するために、面積率にて８０％以上のマルテンサイト
を含有することが必要である。The hoop according to the present invention has the chemical components described above, and must also contain martensite in an area ratio of 80% or more in order to ensure the required bending workability even after electrogalvanizing. be.
前述したように、フープには、切欠強度比が０゜７５以
上であることが必要とされるが、本発明の電気亜鉛めっ
きフープによれば、切欠強度比０．８以上を得ることが
できると共に、前記曲げ回数４回以上及び伸び５．０％
以上を達成することができる。As mentioned above, the hoop is required to have a notch strength ratio of 0°75 or more, but according to the electrogalvanized hoop of the present invention, a notch strength ratio of 0.8 or more can be obtained. In addition, the number of bending times is 4 or more and the elongation is 5.0%.
The above can be achieved.
（発明の効果）
以上のように、本発明によれば、複合組織冷延鋼板にお
ける化学成分及び組織を適正に規制することによって、
伸び及び曲げ加工性にすぐれる引張強度１３０ｋｇｆ／
ｗ＋ｎ＋”以上の電気亜鉛めっき高強度フープを得るこ
とができる。(Effects of the Invention) As described above, according to the present invention, by appropriately regulating the chemical components and structure of a cold-rolled steel sheet with a composite structure,
Tensile strength 130kgf/ with excellent elongation and bending workability
An electrogalvanized high-strength hoop with a strength of w+n+'' or more can be obtained.
（実施例）
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 described below with reference to Examples, but the present invention is not limited to these Examples in any way.
第２表に示す化学成分を有する１０に「真空溶解鋼を用
いて、常法に従って、分塊、熱間圧延及び冷間圧延を行
なって、０．７ ＋ｎ厚冷延鋼板を製造した。これに水
焼入れ型連続焼鈍をシミュレートしたソルトバス熱処理
を施した０次いで、脱脂及び洗浄した後、表裏面に目付
量１０ ｇ／ｒｒｒにて電気亜鉛めっきを施した。これ
をＪＩＳ ５号引張試験片及び１９１１幅のシャーまま
引張試験片（標点間距離１００ｍ）に加工し、機械的性
質を評価した。Using vacuum melted steel No. 10 having the chemical composition shown in Table 2, blooming, hot rolling and cold rolling were performed according to conventional methods to produce a 0.7 +n thick cold rolled steel plate. The was subjected to salt bath heat treatment simulating water quenching type continuous annealing.Then, after degreasing and washing, electrogalvanization was applied to the front and back surfaces at a basis weight of 10 g/rrr.This was subjected to a JIS No. 5 tensile test. The specimens were processed into tensile test specimens with a width of 1911 (gage distance 100 m) and their mechanical properties were evaluated.
結果を第２表に示す。The results are shown in Table 2.
比較＠２は、マルテンサイト量が過少であるので、伸び
は高いが、切欠強度比に劣る。比較ｆ４３は、Ｓｉ量が
過少であるので、マルテンサイト面積率は８０％を越え
るが、延性が乏しく、切欠強度比に劣る。比較鋼４も、
Ｓｉ量が過少であるので、切欠強度比に劣る。また、比
較ａｌｌは、化単成分は、本発明で規定する範囲内にあ
るが、マルテンサイト量が過少であるので、切欠強度比
に劣る。In Comparison @2, since the amount of martensite is too small, the elongation is high, but the notch strength ratio is inferior. Comparative f43 has too little Si content, so the martensite area ratio exceeds 80%, but it has poor ductility and poor notch strength ratio. Comparative steel 4 also
Since the amount of Si is too small, the notch strength ratio is poor. In addition, in comparison all, although the chemical component is within the range specified by the present invention, the amount of martensite is too small, so the notch strength ratio is inferior.
これらに対して、本発明によるフープは、切欠強度比０
．８以上、曲げ半径３Ｎでの繰り返し９０゜曲げにおけ
る破断までの曲げ回数４回以上の満足すべき性質を有す
る。In contrast, the hoop according to the present invention has a notch strength ratio of 0
．． 8 or more, and has satisfactory properties such that the number of bends before breakage in repeated 90° bending with a bending radius of 3N is 4 or more times.
Claims (2)
以上のマルテンサイトを含有することを特徴とする切欠
強度比が０．８以上、引張強さが１３０ｋｇｆ／ｍｍ＾
２以上である電気亜鉛めつきした高強度ベーリングフー
プ。(1) Contains 0.10 to 0.25% of C, 1.0 to 2.3% of Si, and 1.0 to 3.0% of Mn in weight%, and has a Si/Mn weight ratio ≧0. 5, the balance consists of iron and unavoidable impurities, and the area ratio is 80%.
The notch strength ratio is 0.8 or more, and the tensile strength is 130 kgf/mm^.
High-strength baling hoop with electrogalvanized coating of 2 or more.
、 残部鉄及び不可避的不純物よりなり、面積率にて８０％
以上のマルテンサイトを含有することを特徴とする切欠
強度比が０．８以上、引張強さが１３０ｋｇｆ／ｍｍ＾
２以上であることを特徴とする電気亜鉛めつきした高強
度ベーリングフープ。(2) Contains (a) C 0.10 to 0.25%, Si 1.0 to 2.3%, and Mn 1.0 to 3.0% in weight%, and Si/Mn weight ratio ≧0.5, (b) P 0.10% or less, Cu 0.50% or less, Cr 0.50% or less, Ni 0.50% or less, Mo 0.50% or less, Ti 0.10% Contains at least one element selected from the group consisting of Nb 0.10% or less, V 0.10% or less, and B 0.006% or less, with the balance consisting of iron and unavoidable impurities, and has an area ratio of 80%
The notch strength ratio is 0.8 or more, and the tensile strength is 130 kgf/mm^.
A high-strength baling hoop electrogalvanized, characterized by a strength of 2 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20875286A JPS6362843A (en) | 1986-09-03 | 1986-09-03 | Electrogalvanized baling hoop having high strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20875286A JPS6362843A (en) | 1986-09-03 | 1986-09-03 | Electrogalvanized baling hoop having high strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6362843A true JPS6362843A (en) | 1988-03-19 |
Family
ID=16561493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20875286A Pending JPS6362843A (en) | 1986-09-03 | 1986-09-03 | Electrogalvanized baling hoop having high strength |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6362843A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999032670A1 (en) * | 1997-12-19 | 1999-07-01 | Exxonmobil Upstream Research Company | Ultra-high strength ausaged steels with excellent cryogenic temperature toughness |
| US6254698B1 (en) | 1997-12-19 | 2001-07-03 | Exxonmobile Upstream Research Company | Ultra-high strength ausaged steels with excellent cryogenic temperature toughness and method of making thereof |
| KR20200124289A (en) * | 2018-03-30 | 2020-11-02 | 제이에프이 스틸 가부시키가이샤 | High strength galvanized steel sheet, high strength member and their manufacturing method |
-
1986
- 1986-09-03 JP JP20875286A patent/JPS6362843A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999032670A1 (en) * | 1997-12-19 | 1999-07-01 | Exxonmobil Upstream Research Company | Ultra-high strength ausaged steels with excellent cryogenic temperature toughness |
| US6251198B1 (en) | 1997-12-19 | 2001-06-26 | Exxonmobil Upstream Research Company | Ultra-high strength ausaged steels with excellent cryogenic temperature toughness |
| US6254698B1 (en) | 1997-12-19 | 2001-07-03 | Exxonmobile Upstream Research Company | Ultra-high strength ausaged steels with excellent cryogenic temperature toughness and method of making thereof |
| ES2181566A1 (en) * | 1997-12-19 | 2003-02-16 | Exxon Production Research Co | Ultra-high strength ausaged steels with excellent cryogenic temperature toughness |
| KR20200124289A (en) * | 2018-03-30 | 2020-11-02 | 제이에프이 스틸 가부시키가이샤 | High strength galvanized steel sheet, high strength member and their manufacturing method |
| US11530463B2 (en) | 2018-03-30 | 2022-12-20 | Jfe Steel Corporation | High-strength galvanized steel sheet, high strength member, and method for manufacturing the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20180128977A (en) | METHOD FOR MANUFACTURING TWIP STEEL SHEET HAVING AUSTENITE MATRIX | |
| EP0589415B1 (en) | Steel sheet for press working that exhibits excellent stiffness and satisfactory press workability | |
| JP2951480B2 (en) | High-tensile cold-rolled steel sheet excellent in chemical conversion property and formability and method for producing the same | |
| JPH11279693A (en) | Good workability/high strength hot rolled steel sheet excellent in baking hardenability and its production | |
| CZ402497A3 (en) | Ferritic steel, process of its manufacture and use | |
| JPH07197186A (en) | Hot-rolled steel sheet having >=980n/mm2 strength represented by excellent delayed fracture resistant characteristic and its production | |
| JP3227405B2 (en) | Ferritic stainless steel with excellent antibacterial properties | |
| JPS6362843A (en) | Electrogalvanized baling hoop having high strength | |
| JP3266328B2 (en) | High-tensile cold-rolled steel sheet excellent in chemical conversion property and formability and method for producing the same | |
| JP4506005B2 (en) | High strength steel sheet for warm forming and forming method thereof | |
| JP2820819B2 (en) | High strength thin steel sheet excellent in stretch flange formability and method for producing the same | |
| JP3587885B2 (en) | Manufacturing method of hot-dip galvanized steel sheet for corrosion-resistant refractory structure | |
| JPH0617124A (en) | Production of hot-dip galvanized sheet of high tensile strength steel for refractory use | |
| JPH08260106A (en) | Chromium steel sheet excellent in formability | |
| JPH09263905A (en) | Soft austenitic stainless steel | |
| JP3142922B2 (en) | Manufacturing method of hot-rolled high-strength hot-dip galvanized steel sheet with low yield ratio and excellent pitting corrosion resistance | |
| JPH06287685A (en) | High strength hot rolled sheet excellent in elongation flanging property and fatigue characteristic | |
| JP3464288B2 (en) | Manufacturing method of hot-dip aluminized steel sheet for fire-resistant structure with excellent corrosion resistance | |
| JP2778429B2 (en) | Method for producing high-strength steel sheet having bake hardenability | |
| JP3171215B2 (en) | Hot-dip aluminum-coated steel sheet with improved corrosion resistance and method for producing the same | |
| JPH05140653A (en) | Manufacture of low yield ratio cold rolled high tensile strength galvanized steel sheet excellent in pitting corrosion resistance | |
| JPH08104965A (en) | Production of hot-dip zinc aluminum alloy plated steel sheet for fire-resistant structure excellent in corrosion resistance | |
| JPH11222644A (en) | High strength and high ductility hot dip galvanized steel sheet and hot dip galvannealed steel sheet | |
| JP3848474B2 (en) | Low alloy seawater corrosion resistant steel wire | |
| JPH07316649A (en) | Production of hot rolled steel plate excellent in workability and corrosion resistance |