JPS634045A - Suction roll stock made of forged two-phase stainless steel for paper making - Google Patents
Suction roll stock made of forged two-phase stainless steel for paper makingInfo
- Publication number
- JPS634045A JPS634045A JP14607186A JP14607186A JPS634045A JP S634045 A JPS634045 A JP S634045A JP 14607186 A JP14607186 A JP 14607186A JP 14607186 A JP14607186 A JP 14607186A JP S634045 A JPS634045 A JP S634045A
- Authority
- JP
- Japan
- Prior art keywords
- forging
- stainless steel
- phase
- suction roll
- forged
- 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 16
- 239000010935 stainless steel Substances 0.000 title claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 39
- 238000005242 forging Methods 0.000 claims abstract description 23
- 229910001566 austenite Inorganic materials 0.000 claims abstract description 12
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 11
- 229910052802 copper Inorganic materials 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 4
- 230000001186 cumulative effect Effects 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 abstract description 23
- 238000005260 corrosion Methods 0.000 abstract description 23
- 238000005266 casting Methods 0.000 abstract description 8
- 238000010438 heat treatment Methods 0.000 abstract description 7
- 229910052804 chromium Inorganic materials 0.000 abstract description 5
- 229910052750 molybdenum Inorganic materials 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 229910052748 manganese Inorganic materials 0.000 abstract description 3
- 229910052710 silicon Inorganic materials 0.000 abstract description 3
- 229910052761 rare earth metal Inorganic materials 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 238000003754 machining Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000009977 dual effect Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid group Chemical group S(O)(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005275 alloying Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 230000002301 combined effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 229910001039 duplex stainless steel Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000004881 precipitation hardening Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は特に耐食性と高い疲労強度の要求される製紙用
サクションロールに使用される鍛造ステンレス鋼製の製
紙用サクションロール素材に関するもので、特にサクシ
ョンロールの機械加工工程における素材の機械加工性を
十分に考慮したサクションロール素材を提供しようとす
るものである。Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a papermaking suction roll material made of forged stainless steel used for papermaking suction rolls that particularly require corrosion resistance and high fatigue strength. The present invention aims to provide a suction roll material that fully considers the machinability of the material in the suction roll machining process.
（従来の技術）
製紙用サクションロールは、パルプ液中の水分を脱水す
るためウェットパートとプレスパートにおいて組込まれ
ている中心となるロールである。(Prior Art) A papermaking suction roll is a central roll installed in a wet part and a press part to dehydrate water in pulp liquid.
抄紙速度の高速化にともない、サクションロールに作用
するＮＩＰ圧の上昇あるいは長時間の使用を保証する高
い腐食疲労強度が要求されるようになった。また、白水
中には硫酸基、Ｃ１−イオン、その他、ステンレス鋼と
いえども腐食してしまうＮａｚＳｔＯｚ、 ＮａｚＳｔ
Ｏｚ等が存在しているため、その雰囲気中で長時間の使
用に耐えられる材料が必要である。As paper making speeds have increased, there has been a demand for higher NIP pressure acting on suction rolls and higher corrosion fatigue strength to ensure long-term use. In addition, white water contains sulfuric acid groups, C1- ions, and other substances such as NazStOz and NazSt, which corrode even stainless steel.
Since oxygen and the like are present, a material that can withstand long-term use in that atmosphere is required.
これらのニーズに従って、従来からサクションロール用
素材として多くの２和合金が開発され、使用されてきた
が、それらの多（は遠心鋳造法により製造されたもので
あり、代表的なものとしては、製紙用サクションロール
の使用条件を考慮し合金組成を限定した特公昭５７−５
８７３号記載の２相系ステンレス鋳鋼が挙げられる。In response to these needs, many dual alloys have been developed and used as materials for suction rolls, but most of them are manufactured by centrifugal casting, and typical ones include: Special Publication No. 57-5 in which the alloy composition was limited in consideration of the usage conditions of papermaking suction rolls.
Duplex stainless steel cast steel described in No. 873 may be mentioned.
前記特公昭５７−５８７３号公報に示される２相系ステ
ンレス鋳鋼の特徴とするところは、化学成分の調整によ
りフェライト量を２０〜４０％となるように限定したと
ころであり、その効果として耐食性および靭性の改善が
行われたとしている。The feature of the two-phase cast stainless steel disclosed in the above-mentioned Japanese Patent Publication No. 57-5873 is that the amount of ferrite is limited to 20 to 40% by adjusting the chemical composition, and as a result, corrosion resistance and toughness are improved. Improvements have been made.
しかしながら耐食性は合金成分であるＣｒ量に依存する
もので、１３％Ｃｒ以上では対硫酸の耐食性が改善され
る事は当時既に公知の事実であるため、前記公報記載の
発明の特徴とするところは強靭性を得るためにフェライ
ト量を２０〜４０％と限定した点にある。しかしながら
この材料は１０００℃付近の溶体化加熱温度から急冷さ
れる必要があるため、製品の残留応力レベルが極めて高
（、母相のオーステナイトが軟かいために、次工程にお
いて特に重要な機械加工性が悪い。However, corrosion resistance depends on the amount of Cr, which is an alloy component, and it was already known at the time that corrosion resistance to sulfuric acid was improved with 13% Cr or more. Therefore, the feature of the invention described in the above publication is In order to obtain toughness, the amount of ferrite is limited to 20 to 40%. However, since this material needs to be rapidly cooled from a solution heating temperature of around 1000°C, the residual stress level of the product is extremely high (and because the parent phase austenite is soft, machinability is particularly important in the next process). It's bad.
最終仕上げを行う機械加工メーカーの間では、材料の機
械加工性が重要であるということは従来から指摘されて
おり、材料の機械加工性が悪いと、ドリリングの際事故
が起き易くなる。そのような事故が起こると腐食の原因
となる表面疵ができたり応力集中する場所ができるよう
になる。It has long been pointed out that the machinability of the material is important among machining manufacturers that perform final finishing, and if the machinability of the material is poor, accidents are likely to occur during drilling. When such an accident occurs, it creates surface flaws that can lead to corrosion and places where stress is concentrated.
従来からサクションロールの折損事故に対スる解析では
腐食孔の形成が事故の主因とされてきたが、その発生場
所の特性については配慮されたことがなかった。応力集
中源がサクションロールとして使用される前から存在す
るとすれば、使用直後から腐食孔の形成が極めて容易で
あるために、これに対処すべ〈従来技術では耐食性の改
善を行ってきた。しかしながら、鋳造品では製造工程上
絶対に回避出来ない鋳造欠陥がロール表面付近に存在す
ることもあり、素材の機械加工性や耐食性を改善する以
前の問題が残っているのである。Traditionally, analyzes of suction roll breakage accidents have considered the formation of corrosion holes to be the main cause of the accident, but the characteristics of the location where they occur have not been considered. If a stress concentration source exists before the roll is used as a suction roll, it is extremely easy to form corrosion holes immediately after use, so this should be dealt with (prior art has improved corrosion resistance). However, in cast products, casting defects that cannot be avoided due to the manufacturing process may exist near the roll surface, and problems remain before the machinability and corrosion resistance of the material can be improved.
（発明が解決しようとする問題点）
耐食性と耐折損性を考慮した２相系合金は、強度・靭性
に優れている。しかしながら素材の段階では全（問題と
ならない機械加工性が、現在の仕上加工に関する機械加
工技術にとって大きな問題となっている。従って本発明
は従来の鋳造技術を主体とするサクションロールの解決
できなかった耐食性、耐折損性を保持しつつ素材の健全
性および均一性を解決するととも機械加工性を解決しよ
うとするものである。(Problems to be Solved by the Invention) A two-phase alloy that takes corrosion resistance and breakage resistance into consideration has excellent strength and toughness. However, machinability, which is not a problem at the material stage, has become a major problem for current machining technology related to finishing. Therefore, the present invention cannot solve the problem of suction rolls mainly based on conventional casting technology. The aim is to improve the integrity and uniformity of the material while maintaining corrosion resistance and breakage resistance, as well as machinability.
（問題点を解決するための手段）
本発明は以上のような従来品の問題点を解決することを
目的としてなされたものであり、その特徴とするところ
は、重量でＣ０．０８％以下、Ｓｉ １．０％以下、Ｍ
ｎ １．５％以下、３０．０１５％以下、Ｎｉ５．０〜
７．５％、Ｃｒ ２０．０〜２３．０％、Ｍｏ １．５
〜２．５％、Ｃｕ １．０〜３．５％、ＲＥＭＩ ０〜
１１０ｐｐａ＋ 、残部実質的にＦｅより成る鋳造材に
、鍛錬成形比の積算合計が３以上となるパイプ鍛造の後
、熱処理し、析出強化されたフェライト相の基地中にオ
ーステナイト相を体積百分率で１５〜３０％含有するこ
とを特徴とする２相系ステンレス鋼製の製紙用サクショ
ンロール素材にある。(Means for Solving the Problems) The present invention was made for the purpose of solving the problems of the conventional products as described above, and is characterized by: C0.08% or less by weight; Si 1.0% or less, M
n 1.5% or less, 30.015% or less, Ni5.0~
7.5%, Cr 20.0-23.0%, Mo 1.5
~2.5%, Cu 1.0~3.5%, REMI 0~
110ppa+, the remainder substantially consisting of Fe, after pipe forging where the cumulative total of the forging forming ratio is 3 or more, heat treatment is performed to add an austenite phase at a volume percentage of 15 to 15% in a precipitation-strengthened ferrite phase matrix. A papermaking suction roll material made of two-phase stainless steel, characterized by containing 30%.
以下本発明の鍛造２相系ステンレス鋼製の製紙用サクシ
ョンロール素材の成分組成を前記のように限定した理由
について詳述する。The reason why the composition of the papermaking suction roll material made of forged two-phase stainless steel of the present invention is limited as described above will be explained in detail below.
ｃｓ０．ｏｓ％、ＳｉＳ２．０％
ＣおよびＳｉのこの範囲は通常のステンレス鋼の組成範
囲に属するもので、以下に述べる各合金成分の効果を有
効にするためには、この値が上限でありそれ以上では特
に耐食性の点で劣るからである。cs0. os%, SiS 2.0% This range of C and Si belongs to the composition range of normal stainless steel, and in order to make the effects of each alloy component described below effective, this value is the upper limit and higher values are required. This is because they are particularly inferior in terms of corrosion resistance.
ＭｎＳ２．５％、Ｓ≦０．０１５％
Ｍｎは靭性の改善に有効であるが、１．５％以上では可
及的少量存在するＳと化合し鍛造後の接線方向の強度を
低下させるのでこの値を上限とせねばならない。Ｓは０
．０１５％を超えるとＭｎの靭性の改善効果を発揮させ
ることができず、鍛造後の接線方向の強度を低下するた
めＳは０．０１５％以下と限定する。MnS2.5%, S≦0.015% Mn is effective in improving toughness, but if it exceeds 1.5%, it will combine with S, which is present in as little as possible, and reduce the strength in the tangential direction after forging. The value must be set as an upper limit. S is 0
．． If S exceeds 0.015%, the toughness improving effect of Mn cannot be exhibited, and the strength in the tangential direction after forging decreases, so S is limited to 0.015% or less.
５．０％≦Ｎｉ≦７．５％
ＮｉはＣｒとの複合効果で耐食性を向上させると共にオ
ーステナイト量を増加させ靭性の改善にも有効な元素で
あり本発明の成分の範囲では最低５．０％が必要である
が７．５％超ではオーステナイト量の増加により材料強
度の低下があるため７．５％を上限とする。5.0%≦Ni≦7.5% Ni is an element that improves corrosion resistance due to its combined effect with Cr, increases the amount of austenite, and is effective in improving toughness. %, but if it exceeds 7.5%, the strength of the material will decrease due to an increase in the amount of austenite, so the upper limit is set at 7.5%.
２０．０％≦Ｃｒ≦２３．０％
Ｃｒはステンレス鋼として重要な元素であり、フェライ
トを含む高強度でしかも耐食性の優れた素材を得るため
には、本発明の成分の範囲では最低２０．０％を含むこ
とが必要である。しかし２３．０％を超えると機械的性
質の劣化が起るため２３．０％を上限とする。20.0%≦Cr≦23.0% Cr is an important element in stainless steel, and in order to obtain a material containing ferrite with high strength and excellent corrosion resistance, it must be at least 20.0% in the range of the components of the present invention. It is necessary to include 0%. However, if it exceeds 23.0%, mechanical properties deteriorate, so 23.0% is set as the upper limit.
１．５％≦Ｍｏ≦２．５％
Ｍｏは耐局部腐食性を著しく改善するために有用な合金
元素であるが、２．５％を超えて添加されるとフェライ
トの形成が著しく機械的性質が劣化するので、これ以上
の添加は本発明の成分範囲内では有害である。しかしな
がら、耐局部腐食性を得るためには、少なくとも１．５
％の添加が必要である。このことがらＭｏの含有量を１
．５〜２．５％と限定した。゛
１０ｐｐｌＩ≦ＲＥＭ≦１１０ｐｐｍ
ＲＥＭは鋳造組織を改善し、２相合金における相境界の
鋳造クランクの発生を防止する作用を有している。ＲＥ
Ｍを１０ｐｐｍ以上添加すると熱間割れが激減しクラフ
クの進展もほとんどなくなる。1.5%≦Mo≦2.5% Mo is a useful alloying element for significantly improving local corrosion resistance, but when added in excess of 2.5%, the formation of ferrite will significantly impair mechanical properties. The addition of more than this is harmful within the composition range of the present invention, since the However, in order to obtain local corrosion resistance, at least 1.5
% addition is required. This means that the Mo content can be reduced to 1
．． It was limited to 5-2.5%.゛10pplI≦REM≦110ppm REM has the effect of improving the casting structure and preventing the occurrence of a casting crank at the phase boundary in a two-phase alloy. R.E.
When 10 ppm or more of M is added, hot cracking is drastically reduced and the development of cracks is almost eliminated.
粒界に残留するＲＥＭの効果でステンレス鋼特有の長い
加工チップが比較的短くなるため、本発明鋼の機械加工
性は著しく改善される。本発明鋼の成分範囲内でこの効
果は１１０ｐｐｎ＋超ではそれ以下と変わらないため、
１１０ｐｐｍを上限とする。Due to the effect of REM remaining in the grain boundaries, the long machining chips peculiar to stainless steel are made relatively short, so the machinability of the steel of the present invention is significantly improved. Within the composition range of the steel of the present invention, this effect is no different at more than 110 ppn+ than at less than 110 ppn+.
The upper limit is 110 ppm.
１、０％≦Ｃｕ≦３．５％
Ｃｕは、ステンレス鋼の粒界における耐食性を改善する
合金成分であるが、３．５％を超えて添加されると本発
明鋼の成分範囲内では、熱間脆性をひきおこし鍛造性が
極端に低下する。それゆえに、３．５％を上限とするが
、Ｃｕは析出強化元素であるためフェライト相の強化に
有効である。この析出によりフェライト相の機械加工性
を改善するためには最低限１．０％のＣｕを必要とする
。１．０％未満では析出強化の程度が低く機械加工性の
改善があまり期待できない。以上の理由により、Ｃｕは
１．０〜３．５％と限定された。1. 0%≦Cu≦3.5% Cu is an alloying component that improves the corrosion resistance at the grain boundaries of stainless steel, but if it is added in excess of 3.5%, within the composition range of the steel of the present invention, This causes hot brittleness and extremely reduces forgeability. Therefore, the upper limit is set at 3.5%, but since Cu is a precipitation-strengthening element, it is effective in strengthening the ferrite phase. In order to improve the machinability of the ferrite phase through this precipitation, a minimum of 1.0% Cu is required. If it is less than 1.0%, the degree of precipitation strengthening will be low and no significant improvement in machinability can be expected. For the above reasons, Cu was limited to 1.0 to 3.5%.
本発明鋼の熱処理後の組織は析出強化されたフェライト
とオーステナイトの２相混合組織であるが、フェライト
相は高強度低靭性の組織であるため、靭性の比較的高い
組織成分であるオーステナイト相を最低１５％含有する
必要がある。また、オーステナイト相が体積百分率で３
０％を超えるとオーステナイトの低強度の特性が強調さ
れるようになるため、本発明鋼の成分範囲内ではオース
テナイト量を３０％以下としなければ高い降伏強度を得
ることができない。また１５％未満では、靭性が十分得
られなくなる。このような理由から強度と靭性の両特性
を満足させるためにはオーステナイト相の量を１５〜３
０％と限定する。The structure of the steel of the present invention after heat treatment is a two-phase mixed structure of precipitation-strengthened ferrite and austenite, but since the ferrite phase is a structure with high strength and low toughness, the austenite phase, which is a structural component with relatively high toughness, is It is necessary to contain at least 15%. In addition, the austenite phase has a volume percentage of 3
If it exceeds 0%, the low strength characteristics of austenite will be emphasized, so that within the composition range of the steel of the present invention, high yield strength cannot be obtained unless the austenite amount is 30% or less. Moreover, if it is less than 15%, sufficient toughness cannot be obtained. For this reason, in order to satisfy both strength and toughness characteristics, the amount of austenite phase should be 15 to 3.
Limited to 0%.
次に本発明のステンレス鋼を製造する方法について説明
する。前述の規定された成分を有する鋳塊を作製後、優
れた機械的性質および耐食性を有するサクションロール
用素材を得る目的で据え込み、穴ひろげ、中空鍛造とい
う一連のパイプ製造のためのパイプ鍛造を実施する。パ
イプ鍛造はマンドレルを利用した鍛造法で所定の径およ
び長さのパイプを得るために実施され、メタルフローは
サクシシンロールの強度上昇に役立つ材料の強化が行わ
れたことを示す。こ０ｊ鍛造の結果パイプ形状を得るが
、本発明の特徴とするところは、サクションロールの強
度的に改善されなければならない特性値が接線方向の疲
労強度であることに着目し、接線方向の強度上昇が十分
に期待できるように鍛錬成形比の積算合計を３以上と規
定するところである。すなわち、サクションロールはプ
レスロールとの線接触部の応力により与えられる潰れ応
力による接線方向における引張り圧縮の交番応力下で稼
動しているため、特に接線方向の高い疲労強度が重要で
ある。鋳造材の強度および靭性は鍛錬により改善される
事は良く知られており、本発明の素材に関しては十分な
再結晶が行なわれるため鍛錬成形比は３以上で鋳造状態
の性質を一段と改善することができる。鍛錬成形比５以
上では特に接線方向の性質がさらに改善される。Next, a method for manufacturing stainless steel of the present invention will be explained. After producing an ingot with the above-mentioned specified composition, a series of pipe forging steps including upsetting, hole widening, and hollow forging are performed to obtain a suction roll material with excellent mechanical properties and corrosion resistance. implement. Pipe forging was carried out to obtain a pipe of a specified diameter and length using a forging method using a mandrel, and the metal flow indicates that the material was strengthened to help increase the strength of the sakshi thin roll. As a result of this OJ forging, a pipe shape is obtained.The feature of the present invention is that the characteristic value that must be improved in terms of strength of the suction roll is the fatigue strength in the tangential direction. The cumulative total of the forging and forming ratio is specified to be 3 or more so that a sufficient increase can be expected. That is, since the suction roll operates under alternating stress of tension and compression in the tangential direction due to the crushing stress given by the stress of the line contact portion with the press roll, high fatigue strength in the tangential direction is especially important. It is well known that the strength and toughness of cast materials can be improved by forging, and since the material of the present invention undergoes sufficient recrystallization, the forging forming ratio can be set to 3 or more to further improve the properties of the cast state. Can be done. At a forging forming ratio of 5 or more, the properties, especially in the tangential direction, are further improved.
（実施例） 次に本発明鋼の特徴を実施例によって述べる。(Example) Next, the characteristics of the steel of the present invention will be described by way of examples.
下記第１表は本発明鋼の実施例の製品サイズおよび鍛錬
成形比の積算合計を示しており、製品長さに依存して、
中空鍛造による鍛錬効果の程度が増大し、積算の鍛錬成
形比は増加する伸開にある。Table 1 below shows the cumulative total of the product size and wrought forming ratio of the examples of the steel of the present invention, and depending on the product length,
The degree of forging effect due to hollow forging increases, and the cumulative forging forming ratio is increasing and expanding.
したがって、積算合計の鍛錬成形比を３以上とするため
製品サイズを考慮し使用する鋼塊のサイズ。Therefore, in order to make the cumulative total forging ratio 3 or more, the size of the steel ingot to be used takes into consideration the product size.
鍛造作業工程の選定を適切なものとしなければならない
。The forging process must be selected appropriately.
第２表ｔよ本発明鋼の実施例と実際にサクションロール
として使用されている比較材の化学組成を示したもので
ある。第３表は第２表に掲げた本発明材の実施例の機械
的性質を示し、第４表は本発明材と遠心鋳造材の腐食試
験結果を示したものであり、第５表は比較材りの１３Ｃ
ｒ系素材の機械加工性を１００としてその他の素材およ
び本発明鋼の機械加工性を相対的に示したものである。Table 2 shows the chemical compositions of examples of the steel of the present invention and comparative materials actually used as suction rolls. Table 3 shows the mechanical properties of the examples of the invention materials listed in Table 2, Table 4 shows the corrosion test results of the invention materials and centrifugally cast materials, and Table 5 shows the comparison. 13C of lumber
The machinability of other materials and the steel of the present invention is shown relative to the machinability of the r-based material as 100.
本発明材は通常の析出硬化型ステンレス鋼材と同様１０
２０℃〜１１００℃で加熱後焼入し４５０〜６００℃の
温度範囲で焼戻しを行っている。第３表からも明らかな
ように、強度および靭性はマルテンサイト系のサクショ
ンロール材に匹敵する強度および靭性を示しており、耐
食性としては２和合金として十分な性能を示し、しかも
機械加工性は従来の２和合金中最も優れた加工性を有し
ているといえる。The material of the present invention is similar to ordinary precipitation hardening stainless steel material.
After heating at 20°C to 1100°C, quenching is performed and tempering is performed at a temperature range of 450°C to 600°C. As is clear from Table 3, the strength and toughness are comparable to those of martensitic suction roll materials, and the corrosion resistance is sufficient for a dual alloy. It can be said that it has the best workability among the conventional dual alloys.
寸 塞
派 の
派
（発明の効果）
本発明材は以上のように、従来の素材の組成範囲と類似
しているにもかかわらず鍛造により、素材特性がすべて
の性質で改善されているのが特徴であるため製紙用サク
ションロールとして使用するのに極めて適するものであ
り、特に耐折損性が要求される抄紙機には熱処理条件の
選択により靭性を付加することの可能な材料である。し
かも仕上加工時に必要となる良好な切削性を有する本発
明によるステンレス鋼の工業的価値はきわめて大きいと
いえる。Effects of the Invention As mentioned above, although the material of the present invention has a composition range similar to that of conventional materials, it has improved all material properties through forging. These characteristics make it extremely suitable for use as suction rolls for papermaking, and it is a material that can be made tougher by selecting heat treatment conditions, especially for paper machines that require breakage resistance. Moreover, it can be said that the industrial value of the stainless steel according to the present invention, which has good machinability necessary for finishing processing, is extremely large.
抄紙機の生産性を向上する最も有効な方法は機械的に圧
力を加えて水を絞る方法であり、そのためにはロールに
加えられる圧力（ＮＩＰ）を増加しなければならない。The most effective way to improve the productivity of a paper machine is to mechanically apply pressure to squeeze out water, which requires increasing the pressure applied to the rolls (NIP).
従来から一般的に使用されてきた鋳造材と比較すると同
一化学成分で製造された鍛造材には応力集中源となる鋳
造欠陥がなく、機械加工ミスをひきおこさない優れた機
械加工性を有するため、本発明による鍛造ステンレス鋼
製のサクションロール素材を利用することでこれまで以
上に高いＮＩＰ圧を用いた設計による操業が安心して実
施できる事になるので、本発明は産業上碑益するところ
が極めて大である。Compared to cast materials that have been commonly used in the past, forged materials manufactured with the same chemical composition do not have casting defects that can cause stress concentration, and have excellent machinability that does not cause machining errors. By using the forged stainless steel suction roll material according to the present invention, it is possible to safely carry out operations designed to use higher NIP pressures than ever before, so the present invention has great industrial benefits. It's large.
Claims (1)
５％以下、Ｓ０．０１５％以下、Ｎｉ５．０〜７．５％
、Ｃｒ２０．０〜２３．０％、Ｍｏ１．５〜２．５％、
Ｃｕ１．０〜３．５％、ＲＥＭ１０〜１１０ｐｐｍ、残
部実質的にＦｅより成る鋳造材に、鍛錬成形比の積算合
計が３以上となるパイプ鍛造の後、熱処理し、析出強化
されたフェライト相の基地中にオーステナイト相を体積
百分率で１５〜３０％含有することを特徴とする２相系
ステンレス鋼製の製紙用サクションロール素材。By weight, C0.08% or less, Si1.0% or less, Mn1.
5% or less, S 0.015% or less, Ni 5.0-7.5%
, Cr20.0-23.0%, Mo1.5-2.5%,
A cast material consisting of 1.0 to 3.5% Cu, 10 to 110 ppm REM, and the remainder substantially Fe is forged into a pipe with a cumulative forging ratio of 3 or more, and then heat treated to form a precipitation-strengthened ferrite phase. A papermaking suction roll material made of two-phase stainless steel, characterized in that the base contains an austenite phase of 15 to 30% by volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14607186A JPH0246661B2 (en) | 1986-06-24 | 1986-06-24 | TANZO2SOKEISEKISHUTSUKYOKAGATASUTENRESUKOSEINOSEISHOSAKUSHONROORUSOZAI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14607186A JPH0246661B2 (en) | 1986-06-24 | 1986-06-24 | TANZO2SOKEISEKISHUTSUKYOKAGATASUTENRESUKOSEINOSEISHOSAKUSHONROORUSOZAI |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS634045A true JPS634045A (en) | 1988-01-09 |
| JPH0246661B2 JPH0246661B2 (en) | 1990-10-16 |
Family
ID=15399434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14607186A Expired - Lifetime JPH0246661B2 (en) | 1986-06-24 | 1986-06-24 | TANZO2SOKEISEKISHUTSUKYOKAGATASUTENRESUKOSEINOSEISHOSAKUSHONROORUSOZAI |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246661B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01198448A (en) * | 1988-02-03 | 1989-08-10 | Kubota Ltd | Two-phase stainless steel having excellent drill workability |
| WO1997040204A1 (en) * | 1996-04-24 | 1997-10-30 | J&L Fiber Services, Inc. | Stainless steel alloy for pulp refiner plate |
| US6245289B1 (en) | 1996-04-24 | 2001-06-12 | J & L Fiber Services, Inc. | Stainless steel alloy for pulp refiner plate |
| JP2009212006A (en) * | 2008-03-05 | 2009-09-17 | Uchihashi Estec Co Ltd | Circuit breaking method for excessive current and protection element |
-
1986
- 1986-06-24 JP JP14607186A patent/JPH0246661B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01198448A (en) * | 1988-02-03 | 1989-08-10 | Kubota Ltd | Two-phase stainless steel having excellent drill workability |
| WO1997040204A1 (en) * | 1996-04-24 | 1997-10-30 | J&L Fiber Services, Inc. | Stainless steel alloy for pulp refiner plate |
| US5824265A (en) * | 1996-04-24 | 1998-10-20 | J & L Fiber Services, Inc. | Stainless steel alloy for pulp refiner plate |
| US6245289B1 (en) | 1996-04-24 | 2001-06-12 | J & L Fiber Services, Inc. | Stainless steel alloy for pulp refiner plate |
| JP2009212006A (en) * | 2008-03-05 | 2009-09-17 | Uchihashi Estec Co Ltd | Circuit breaking method for excessive current and protection element |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0246661B2 (en) | 1990-10-16 |
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