JPS6033894B2 - Wear-resistant alloy for hot conveyor rolls - Google Patents
Wear-resistant alloy for hot conveyor rollsInfo
- Publication number
- JPS6033894B2 JPS6033894B2 JP56163719A JP16371981A JPS6033894B2 JP S6033894 B2 JPS6033894 B2 JP S6033894B2 JP 56163719 A JP56163719 A JP 56163719A JP 16371981 A JP16371981 A JP 16371981A JP S6033894 B2 JPS6033894 B2 JP S6033894B2
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- Prior art keywords
- alloy
- wear
- resistance
- wear resistance
- content
- 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.)
- Expired
Links
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- Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
- Rollers For Roller Conveyors For Transfer (AREA)
Description
【発明の詳細な説明】
本発明は、熱間搬送ロール材として好適な耐摩耗性等に
すぐれた合金に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an alloy having excellent wear resistance and the like and suitable as a hot conveyance roll material.
赤熱鋼材等を移送する所員胃熱間搬送ロールは、高温材
料との接触による焼付きや冷却水による腐食が生じにく
く、かつ耐摩耗性にすぐれたものであることが必要であ
る。Hot transport rolls for transporting red-hot steel materials and the like must be resistant to seizure due to contact with high-temperature materials and corrosion due to cooling water, and must have excellent wear resistance.
従来、この搬送ロール用合金として、主に５Ｃｒ−０．
７Ｍｏ−０．３的−Ｆｅ系合金が用いられているが、昨
今のラィ：／スピードアップ、その他の操業条件の苛酷
化とともに、耐摩耗性や耐食性の不足をきたし、十分な
耐久性を保証することが困難になってきた。Conventionally, 5Cr-0.
7Mo-0.3-Fe-based alloys are used, but with the recent increase in speed and other harsher operating conditions, they have become lacking in wear resistance and corrosion resistance, and sufficient durability cannot be guaranteed. It has become difficult to do so.
この対策として、例えば、低炭素１３Ｃｒ系合金を使用
することも考えられるが、この合金は耐摩耗性、耐食性
の良好な反面、耐焼付性に欠けるため、熱間搬送ロール
用合金としての実用に耐えることができない。熱間搬送
ロール材として耐食性、耐焼付性にすぐれ、かつ高度の
耐摩耗性を具備した新たな合金の開発が要請される所以
である。本発明は上記要請に応える新たな合金を提供す
るもので、その特徴とするところは、ＣＩ．４〜２．５
％、Ｓｉ２．０％以下、Ｍｎ２．０％以下、Ｃｒ８．３
〜２０．４％、残部実質的にＦｅから成る合金鋼、また
はＣＩ．４〜２．５％、Ｓｉ２．０％以下、Ｍｎ２．０
％以下、Ｃｒ８．３〜２０．４％、およびＮｉｌ．０％
以下、ＷＯ．５〜１．５％、Ｍｏｌ〜５％、ＶＯ．５〜
７％から選ばれる１種もしくは２種以上、残部実質的に
Ｆｅからなる合金鋼であって、Ｃｒ含有量とＣ含有量と
につき、その比〔Ｃｒ（％）／Ｃ（％）〕を５〜１０と
し、かつ下式〔１〕：Ｋ＝１２．３ｘＣ（％）十０．５
５ｘＣｒ（％）−１５．２．・‐〔１〕にて算出される
Ｋの値が１０〜２１（％）となるごと〈に調整された化
学成分組成を有する点にあり、かかる成分組成の特定に
よって、熱間搬送ロール用合金として必要な諸特性、と
りわけ耐摩耗性を著しく高め、苛酷化する操業条件下に
おいても、すぐれた耐久性を保証することを可能にした
。As a countermeasure to this problem, for example, it is possible to use a low carbon 13Cr alloy, but although this alloy has good wear resistance and corrosion resistance, it lacks seizure resistance, so it is not practical as an alloy for hot conveyor rolls. I can't stand it. This is why there is a demand for the development of a new alloy that has excellent corrosion resistance, seizure resistance, and high wear resistance as a hot transport roll material. The present invention provides a new alloy that meets the above requirements, and is characterized by CI. 4-2.5
%, Si2.0% or less, Mn2.0% or less, Cr8.3
~20.4%, the remainder substantially Fe, or CI. 4-2.5%, Si2.0% or less, Mn2.0
% or less, Cr8.3-20.4%, and Nil. 0%
Below, WO. 5-1.5%, Mol-5%, VO. 5~
An alloy steel consisting of one or more selected from 7% and the remainder substantially Fe, with a ratio of Cr content and C content [Cr (%)/C (%)] of 5%. ~10, and the following formula [1]: K = 12.3 x C (%) 10.5
5xCr(%)-15.2.・-When the value of K calculated in [1] is 10 to 21 (%), it has a chemical composition that is adjusted to This has significantly improved the various properties required for the new material, especially wear resistance, and has made it possible to guarantee excellent durability even under increasingly severe operating conditions.
以下、本発明について詳しく説明する。なお、本明細書
における成分組成割合（％）はすべて重量％である。第
１図は、後記実施例における各種成分組成のＣｒ−Ｆｅ
系合金に関し、その耐摩耗性（摩耗試験における摩耗減
量）と〔Ｃｒ（％）／Ｃ（％）〕の関係を示したグラフ
であり、第２図は、同じＣｒ−Ｆｅ系合金の耐摩耗性を
、〔１〕式のＫ値との関係で示したグラフである。The present invention will be explained in detail below. In addition, all component composition ratios (%) in this specification are weight %. Figure 1 shows Cr-Fe with various component compositions in Examples described later.
This is a graph showing the relationship between the wear resistance (wear loss in a wear test) and [Cr (%)/C (%)] for the same Cr-Fe alloy. 1 is a graph showing the relationship between the properties and the K value of equation [1].
各図中、「＠」印は、〔Ｃｒ（％）／Ｃ（％）〕および
Ｋ値ともに本発明の規定を満たすものである。なお、付
番１１は従来合金（５Ｃｒ−０．７Ｍｏ−０．３５Ｃ−
Ｆｅ）である。図から明らかなように、耐摩耗性は、〔
Ｃｒ（％）／Ｃ（％）〕および〔１〕式のＫ値と強い相
関を有することが認められ、本発明に従って、〔Ｃｒ（
％）／Ｃ（％）〕を５〜１０とし、かつＫ値を１０〜２
１（％）に調節することによって、従来合金を凌駕する
高い耐摩耗性が得られることがわかる。また、これらの
条件を満たすことにより、熱間搬送ロールに必要な耐食
性および耐競付性も同時に与えられる。本発明合金の構
成成分元素のそれぞれの含有量限定理由は次のとおりで
ある。In each figure, the mark "@" indicates that both [Cr (%)/C (%)] and K value satisfy the regulations of the present invention. The number 11 is the conventional alloy (5Cr-0.7Mo-0.35C-
Fe). As is clear from the figure, the wear resistance is
It has been recognized that there is a strong correlation with the K value of the formula [1] and [Cr(%)/C(%)], and according to the present invention, [Cr(%)
%)/C(%)] from 5 to 10, and the K value from 10 to 2.
It can be seen that by adjusting the amount to 1 (%), high wear resistance exceeding conventional alloys can be obtained. Furthermore, by satisfying these conditions, the hot conveyance roll is provided with the necessary corrosion resistance and anti-corrosion properties at the same time. The reason for limiting the content of each constituent element of the alloy of the present invention is as follows.
Ｃ：１．４〜２．５％
ＣはＣｒ炭化物の形成により耐摩耗性の向上に寄与する
。C: 1.4 to 2.5% C contributes to improving wear resistance by forming Cr carbides.
このための含有量は少くとも１．４％を必要とするが、
あまり多くなると、靭性を損うので、２．５％を上限と
する。この合耐摩耗性向上効果は、Ｃ含有量を、Ｃｒ（
％）／Ｃ（％）の比が５〜１０となるように、Ｃｒ含有
量との相関において定めることにより、最も効果的に発
揮される。Ｓｉ：２．０％以下Ｓｉは合金熔製時の脱酸
剤として欠かせぬ元素であるが、２．０％をこえると鞠
性に悪影響を与えるので、２．０％を上限とする。For this purpose, the content must be at least 1.4%,
If the amount is too large, the toughness will be impaired, so the upper limit is set at 2.5%. This combined wear resistance improvement effect is caused by increasing the C content to Cr(
%)/C(%) is set in the range of 5 to 10 in relation to the Cr content. Si: 2.0% or less Si is an indispensable element as a deoxidizing agent during the production of alloy melts, but if it exceeds 2.0% it has a negative effect on ballability, so the upper limit is set at 2.0%.
Ｍｎ：２．０％以下
Ｍｎは合金溶湯の脱酸・脱硫に必要な元素であり、２．
０％以下含有される。Mn: 2.0% or less Mn is an element necessary for deoxidizing and desulfurizing the molten alloy; 2.
Contains 0% or less.
Ｃｒ：８．３〜２０．４％
Ｃｒは耐摩耗性、耐食性、並びに耐暁付性の向上に有効
な元素であり、これら諸特性を確保するには少くとも８
．３％を必要とする。Cr: 8.3 to 20.4% Cr is an effective element for improving wear resistance, corrosion resistance, and anti-glare properties, and to ensure these properties, at least 8.3% to 20.4% Cr is
．． 3% is required.
含有量の増加とともに、その効果も向上するが、約２０
．４％をこえると、効果はほぼ飽和するので、２０．４
％を上限とする。このＣｒ含有量は、前記のように、Ｃ
ｒ（％）／Ｃ（％）の比が５〜１０となるように定めら
れるとき、顕著な耐摩耗性向上効果が得られる。この場
合、ＣｒとＣの含有量の関数である前記〔１〕式のＫ値
が１０〜２１（％）となることが必要である。Ｎｉ：１
．０％以下
Ｎｉは靭性の向上、糠入性の改善に有効な元素であるが
、多量の添加は経済性を損うので、１．０％を上限とす
る。As the content increases, the effect also improves, but about 20
．． If it exceeds 4%, the effect is almost saturated, so 20.4
The upper limit is %. As mentioned above, this Cr content is
When the ratio of r(%)/C(%) is determined to be 5 to 10, a remarkable effect of improving wear resistance is obtained. In this case, it is necessary that the K value of the above formula [1], which is a function of the contents of Cr and C, be 10 to 21 (%). Ni:1
．． 0% or less Ni is an effective element for improving toughness and cementability, but since adding a large amount impairs economic efficiency, the upper limit is set at 1.0%.
Ｍｏ：１〜５％ Ｍｏは焼入れ硬化能の向上に有効である。Mo: 1-5% Mo is effective in improving hardenability.
ただし、含有量が１％に満たないとその効果は十分でな
く、一方５％をこえると、轍性の著しい低下を招くので
、１〜５％とする。Ｗ：０．５〜１．５％
Ｗは耐摩耗性の改善をもたらす。However, if the content is less than 1%, the effect will not be sufficient, while if it exceeds 5%, the rutting property will be significantly reduced, so it is set at 1 to 5%. W: 0.5-1.5% W improves wear resistance.
このためには少くとも０．５％の含有が望まれるが、あ
まり多くなると、腕化を伴なうので１．５％を上限とす
る。Ｖ：０．５〜７％Ｖは結晶粒の微細化により靭一性
の向上をもたらす。ただし、含有量が０．５％に満たな
いと、その効果は十分でない。一方、多量に添加しても
、それほど効果は高められず、経済性の面で不利となる
ので、７％を上限とする。上記Ｎｉ、Ｍｏ、ＷおよびＶ
の各元素は、単独添加によりそれぞれの効果をもたらす
が、２種以上を同時添加することによってそれらの複合
効果を得ることができる。For this purpose, it is desired that the content be at least 0.5%, but if the content is too large, arms will form, so the upper limit is set at 1.5%. V: 0.5-7% V improves toughness by making crystal grains finer. However, if the content is less than 0.5%, the effect is not sufficient. On the other hand, even if a large amount is added, the effect will not be improved so much and it will be disadvantageous in terms of economy, so the upper limit is set at 7%. The above Ni, Mo, W and V
Each element brings about its own effect when added alone, but a combined effect can be obtained by adding two or more of them simultaneously.
本発明合金は、上記諸元素のほかに、本発明の目的に反
しない限り、種々の合金元素を含有することができる。
なお、合金溶製工程で不可避的に混入するＰ、Ｓ、その
他の不純物元素は、通常この種の合金に許容される範囲
内であれば存在してもかまわない。次に、実施例を挙げ
て本発明合金について具体的に説明する。In addition to the above-mentioned elements, the alloy of the present invention may contain various alloying elements as long as they do not contradict the purpose of the present invention.
Note that P, S, and other impurity elements that are inevitably mixed in during the alloy melting process may be present as long as they are within the range normally allowed for this type of alloy. Next, the alloy of the present invention will be specifically explained with reference to Examples.
実施例
各種成分組成を有するＣｒ−Ｆｅ系合金を溶製し、各合
金について、耐摩耗性、耐食性、並びに耐脇付性を測定
した。EXAMPLE Cr--Fe alloys having various compositions were produced, and the wear resistance, corrosion resistance, and armpit resistance of each alloy were measured.
第１表に各合金の成分組成および〔Ｃｒ（％）／Ｃ（％
）〕、Ｋ値を示す。供試材Ｎｏ．１〜１０は本発明合金
、Ｎｏ．１１〜１６は比較材である。比較材のうちＮｏ
．１１は従来のロール用合金として用いられている広ｒ
−０．７Ｍｏ−０．３に−Ｆｅ合金である。第２表に各
合金の耐摩耗性、耐食性および耐焼付性の試験結果を示
す。また、第１図および第２図は、各合金の耐摩耗性を
〔Ｃｒ（％）／Ｃ（％）〕およびＫ値との関係でそれぞ
れ示したものである。Table 1 shows the composition of each alloy and [Cr(%)/C(%)
)], K value is shown. Test material No. Nos. 1 to 10 are alloys of the present invention, No. Nos. 11 to 16 are comparative materials. No. of comparison materials
．． 11 is a wide r alloy used as a conventional roll alloy.
-0.7Mo-0.3-Fe alloy. Table 2 shows test results of wear resistance, corrosion resistance, and seizure resistance of each alloy. Furthermore, FIGS. 1 and 2 show the wear resistance of each alloy in relation to [Cr (%)/C (%)] and K value, respectively.
図中、各点の付番は供試材Ｎｏ．を示す。なお、各試験
材は次のとおりである。〔Ａ〕 耐摩耗試験
試験片（１仇側め×４仇肋〆）を周速度３の／砂にて回
転させ、その周面に押圧部材（ＳＳ４１製）を３ｋｇの
圧力にて１時間押圧摺後ごせたときの摩耗による試験片
の重量減少量を測定する。In the figure, each point is numbered as the sample material number. shows. In addition, each test material is as follows. [A] Wear resistance test specimen (1 side × 4 sides) was rotated at a peripheral speed of 3 / sand, and a pressing member (made of SS41) was pressed on the peripheral surface with a pressure of 3 kg for 1 hour. Measure the amount of weight loss of the test piece due to wear after rubbing.
〔Ｂ〕 耐焼付性
上記〔Ａ〕と同様の試験後、立体顕微鏡（倍率３０）に
て試験片外表面を観察し、焼付きの有無を調べた。[B] Seizure resistance After the same test as in [A] above, the outer surface of the test piece was observed with a stereoscopic microscope (magnification: 30) to check for the presence or absence of seizing.
〔Ｃ〕 耐食性
試験片（１仇眺め×４仇岬そ）を入工海水中に１０日間
浸債後、その重量変化にて耐食性を評価した。[C] Corrosion resistance test pieces (1 x 4 views) were immersed in seawater for 10 days, and the corrosion resistance was evaluated based on the change in weight.
第１表 供試材化学成分組成（ｗｔ多）等第２表 測定
結果
表中、耐食性および耐焼付性の欄の「０」は良好、「△
」はやや不良、「×」は不良の各評価を意味する。Table 1: Test material chemical composition (wt), etc. Table 2: In the measurement results table, "0" in the corrosion resistance and seizure resistance columns means good, "△
” means a rating of somewhat poor, and “×” means a rating of poor.
前記試験結果から明らかなように、本発明合金は、耐摩
耗性、耐食性および耐焼付性のいづれも良好である。As is clear from the above test results, the alloy of the present invention has good wear resistance, corrosion resistance, and seizure resistance.
特に耐摩耗性については、同じ摩耗試験条件での摩耗減
量が、従来合金（Ｎｏ．１１）の約半分以下であり、卓
越した耐摩耗性を有することが判る。以上のように、本
発明合金は、耐摩耗性、耐食性、耐競付性をそなえ、と
りわけ耐摩耗性にすぐれるので、熱間搬送ロール材とし
て使用することにより、従来材をはかるにしのぐ耐久性
を保証することができる。In particular, regarding wear resistance, the wear loss under the same wear test conditions is about half or less than that of the conventional alloy (No. 11), indicating that it has excellent wear resistance. As described above, the alloy of the present invention has abrasion resistance, corrosion resistance, and collision resistance, and is particularly excellent in abrasion resistance. Therefore, when used as a hot conveyance roll material, it has durability that exceeds that of conventional materials. can be guaranteed.
また、本発明合金は、熱間搬送ロールのみならず、上言
己諸特性が要求される各種装置部材としても適用するこ
とができる。Furthermore, the alloy of the present invention can be applied not only to hot conveyance rolls but also as various equipment members that require the above-mentioned various properties.
第１図はＣｒ−Ｆｅ系合金の耐摩耗性と〔Ｃｒ（％）／
Ｃ（％）〕の関係を示すグラフ、第２図はＣｒ−Ｆｅ系
合金の耐摩耗性とＫ値の関係を示すグラフである。
第１図
第２図Figure 1 shows the wear resistance of Cr-Fe alloys and [Cr(%)/
Figure 2 is a graph showing the relationship between the wear resistance and K value of Cr--Fe alloys. Figure 1 Figure 2
Claims (1)
０％以下、Ｃｒ８．３〜２０．４％、残部実質的にＦｅ
からなり、Ｃｒ含有量とＣ含有量との比〔Ｃｒ（％）／
Ｃ（％）〕が５〜１０であり、かつ下式〔I〕：Ｋ＝１
２．３×Ｃ（％）＋０．５５×Ｃｒ（％）−１５．２…
〔I〕にて算出されるＫ値が１０〜２１（％）であるこ
とを特徴とする熱間搬送ロール用耐摩耗性合金。 ２ Ｃ１．４〜２．５％、Ｓｉ２．０％以下、Ｍｎ２．
０％以下、Ｃｒ８．３〜２０．４％、およびＮｉ１．０
％以下、Ｗ０．５〜１．５％、Ｍｏ１〜５％、Ｖ０．５
〜７％から選ばれる１種もしくは２種以上、残部実質的
にＦｅからなり、Ｃｒ含有量とＣ含有量との比〔Ｃｒ（
％）／Ｃ（％）〕が５〜１０であり、かつ下式〔I〕：
Ｋ＝１２．３×Ｃ（％）＋０．５５×Ｃｒ（％）−１５
．２…〔I〕にて算出されるＫ値が１０〜２１（％）で
あることを特徴とする熱間搬送ロール用耐摩耗性合金。[Claims] 1 C1.4 to 2.5%, Si 2.0% or less, Mn2.
0% or less, Cr8.3-20.4%, remainder substantially Fe
The ratio of Cr content to C content [Cr (%)/
C (%)] is 5 to 10, and the following formula [I]: K = 1
2.3 x C (%) + 0.55 x Cr (%) - 15.2...
A wear-resistant alloy for hot conveyance rolls, characterized in that the K value calculated in [I] is 10 to 21 (%). 2 C1.4-2.5%, Si2.0% or less, Mn2.
0% or less, Cr8.3-20.4%, and Ni1.0
% or less, W0.5-1.5%, Mo1-5%, V0.5
-7% of one or more selected from Fe, the remainder being substantially Fe, and the ratio of Cr content to C content [Cr(
%)/C(%)] is 5 to 10, and the following formula [I]:
K = 12.3 x C (%) + 0.55 x Cr (%) - 15
．． 2...A wear-resistant alloy for hot conveyance rolls, characterized in that the K value calculated in [I] is 10 to 21 (%).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56163719A JPS6033894B2 (en) | 1981-10-14 | 1981-10-14 | Wear-resistant alloy for hot conveyor rolls |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56163719A JPS6033894B2 (en) | 1981-10-14 | 1981-10-14 | Wear-resistant alloy for hot conveyor rolls |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13205886A Division JPS6223966A (en) | 1986-06-06 | 1986-06-06 | Wear resistant alloy for hot conveying roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5864357A JPS5864357A (en) | 1983-04-16 |
| JPS6033894B2 true JPS6033894B2 (en) | 1985-08-06 |
Family
ID=15779345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56163719A Expired JPS6033894B2 (en) | 1981-10-14 | 1981-10-14 | Wear-resistant alloy for hot conveyor rolls |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6033894B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6428344A (en) * | 1987-07-24 | 1989-01-30 | Dai Ichi High Frequency Co Ltd | Roll for scale breaker |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5444220A (en) * | 1977-09-14 | 1979-04-07 | Yasushi Nakashin | Method of repairing underground pipe |
-
1981
- 1981-10-14 JP JP56163719A patent/JPS6033894B2/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5444220A (en) * | 1977-09-14 | 1979-04-07 | Yasushi Nakashin | Method of repairing underground pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5864357A (en) | 1983-04-16 |
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