JPS58210155A - High-strength alloy for oil well pipe with superior corrosion resistance - Google Patents
High-strength alloy for oil well pipe with superior corrosion resistanceInfo
- Publication number
- JPS58210155A JPS58210155A JP9232782A JP9232782A JPS58210155A JP S58210155 A JPS58210155 A JP S58210155A JP 9232782 A JP9232782 A JP 9232782A JP 9232782 A JP9232782 A JP 9232782A JP S58210155 A JPS58210155 A JP S58210155A
- Authority
- JP
- Japan
- Prior art keywords
- less
- alloy
- corrosion resistance
- unavoidable impurities
- tubular goods
- 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
Landscapes
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、高強度並びに優れた耐食性、特に優れた耐
応力腐食割れ性を有し、これらの特性が要求される苛酷
な条件下での石油および天然ガスの採掘に用いられる油
井管用として用いるのに適し7た合金に関するものであ
る。[Detailed Description of the Invention] This invention has high strength and excellent corrosion resistance, especially excellent stress corrosion cracking resistance, and is suitable for oil and natural gas mining under severe conditions where these characteristics are required. The present invention relates to seven alloys suitable for use in oil country tubular goods.
近年、油井および天然ガス井は深井戸化の傾向が著しく
、加えて産出油や産出ガス中には湿潤な硫化水素(H2
S)をはじめとして、炭酸ガス(CO2)や塩素イオン
(CA”)などの腐食性成分が含まれることが多くなっ
てきている。In recent years, there has been a marked trend toward deeper oil and natural gas wells, and in addition, wet hydrogen sulfide (H2) is present in the oil and gas produced.
Increasingly, corrosive components such as carbon dioxide (CO2) and chlorine ions (CA'') are included.
このように井戸深さが増大すると、産出する原油やガス
の圧力、さらに地層の土庄が増加するようになると共に
、使用される油井管自身の自重による引張荷重も増加す
るようになることから、これに使用される油井管には、
これらの力に耐え得る高強度が要求されるばかりでなく
、H2S 、 CO2、およびCA!−&どの腐食性成
分を含有する油井およびガス井環境(以下迅S −CO
t −C1−油井環境という)下での腐食の主たるもの
が応力腐食割れであることから、優れた耐応力腐食割れ
性を具備することが要求される。As the well depth increases in this way, the pressure of the crude oil and gas produced, as well as the soil strength of the stratum, also increases, and the tensile load due to the own weight of the oil country tubular goods used also increases. The oil country tubular goods used for this are
Not only is high strength required to withstand these forces, but also H2S, CO2, and CA! - & Oil and gas well environments containing corrosive components (hereinafter referred to as
Since stress corrosion cracking is the main cause of corrosion under (referred to as t-C1-oil well environment), it is required to have excellent stress corrosion cracking resistance.
一方、油井管の防食には、インヒビタと呼ばれる腐食抑
制剤を油井管内に投入する方法が一般的方法として用い
られているが、この方法は油井およびガス井が海上にあ
る場合などには有効に活用できないことも多く、また十
分な成果も期待できない。さらに油井管を保護皮膜で被
覆する方法を用いる場合もあるが、この場合も十分な防
食成果は期待できない。On the other hand, a common method for preventing corrosion of oil country tubular goods is to inject a corrosion inhibitor called an inhibitor into the oil country tubular goods, but this method is not effective when oil and gas wells are located offshore. It is often not possible to utilize it, and sufficient results cannot be expected. Furthermore, a method of coating oil country tubular goods with a protective film may be used, but in this case as well, sufficient corrosion prevention results cannot be expected.
このような事情に鑑み1.最近ではステンレス鋼をはじ
めとし、インコロイや71ステロイ(いずれも商品名)
などの高級な材料を油井管の製造に用いる試みもなされ
ているが、これらの材料のうち特にインコロイやハステ
ロイは、いずれも高価なNiを多量に含有するために高
価なものとなるばかシでなく、いずれの材料も迅5−C
ot−C1−油井環境下での腐食挙動についての詳細は
十分に解明されるに至っておらず、しかも深井戸用油井
管に要求される高強度を具備していないものである0そ
こで、本発明者等は、上述のような観点から、深井戸や
、苛酷な腐食環境、特にH2S−Cα−C1−油井環境
下での石油および天然ガスの採掘に十分耐え得る高強度
と優れた耐応力腐食割れ性を具備した油井管用材料を得
べく研究を行った結果、(a) Ht S −Cα−
C1−油井環境下における腐食の主たるものは応力腐食
割れであるが、この場合の応力腐食割れは、オーステナ
イトステンレス鋼における一般的な応力腐食割れとは挙
動を全く異にするものであること。すなわち、一般の応
力腐食割れがC1−の存在と深く係わるものであるのに
対して、Ht S −CCh −CI−油井環境による
ものでは、C1−もさることながら、それ以上に&Sの
影蕃が大きいこと。In view of these circumstances, 1. Recently, stainless steel has been introduced, as well as Incoloy and 71 Steroid (all product names).
Attempts have been made to use high-grade materials such as Incoloy and Hastelloy in the manufacture of oil country tubular goods, but these materials, especially Incoloy and Hastelloy, are expensive because they both contain large amounts of expensive Ni. None of the materials meet the standard 5-C.
ot-C1-The details of corrosion behavior in an oil well environment have not yet been fully elucidated, and furthermore, it does not have the high strength required for oil country tubular goods for deep wells. Therefore, the present invention From the above-mentioned viewpoints, these companies have developed high strength and excellent stress corrosion resistance that can withstand oil and natural gas extraction in deep wells and harsh corrosive environments, especially in H2S-Cα-C1 oil well environments. As a result of research to obtain materials for oil country tubular goods with breakability, (a) Ht S -Cα-
C1 - The main type of corrosion in an oil well environment is stress corrosion cracking, but the behavior of stress corrosion cracking in this case is completely different from that of general stress corrosion cracking in austenitic stainless steel. In other words, whereas general stress corrosion cracking is deeply related to the presence of C1-, in Ht S -CCh -CI- oil well environment, not only C1- but also &S is affected. is large.
缶)油井管として実用に供される鋼管は、一般に強度上
の必要から冷間加工が施されるが、冷間加工は上記応力
腐食割れに対する抵抗性を著しく減少させること0
(c) Ph5−CO2−C11−油井環境での鋼の
溶出速度(腐食速度)は、庵、Cr、 Ni、局、およ
びWの含有量に依存し、これらの成分からなる表面皮膜
によって耐食性が保持され、かつこれらの成分は応力腐
食割れに対してもその抵抗性を高め、特に、Mo (%
)+TW(旬:1.5〜4.0−1を満足すると共に、
Mn : 3.0〜15.0 To、 Cr :18.
0〜22.5チ、Ni:15.0〜40.0チを含有し
、さらにMo : 4.0 To以下およびW : S
、OS以下のうちの1種または2種を含有すると、冷間
加工材であっても、きわめて腐食性の強い迅5−cO=
−(J−油井環境下、特に150℃以下のHtS−CO
z −C7−油井環境下において、応力腐食割れに対し
て優れた抵抗性を示す表面皮膜が得られること。(c) Ph5- Steel pipes used for practical use as oil country tubular goods are generally subjected to cold working to improve their strength, but cold working significantly reduces the resistance to stress corrosion cracking mentioned above.0 (c) Ph5- The elution rate (corrosion rate) of steel in a CO2-C11 oil well environment depends on the contents of iron, Cr, Ni, iron, and W. Corrosion resistance is maintained by a surface film made of these components, and these Mo (%) also increases its resistance to stress corrosion cracking.
) + TW (Season: 1.5 to 4.0-1, and
Mn: 3.0-15.0 To, Cr: 18.
Contains 0 to 22.5 inches, Ni: 15.0 to 40.0 degrees, furthermore Mo: 4.0 To or less and W: S.
If one or two of the following are contained in
- (J- HtS-CO under oil well environment, especially below 150℃
z -C7-A surface coating exhibiting excellent resistance to stress corrosion cracking in an oil well environment is obtained.
(d) Ni成分は、表面皮膜に対する作用だけでな
く、組織的にも耐応力腐食割れ性を高める作用をもつこ
と。(d) The Ni component not only has an effect on the surface film, but also has an effect on improving stress corrosion cracking resistance structurally.
(e) 合金成分としてNを0.1〜0.4%含有さ
せると一段と合金強度が向上するようになること。(e) When 0.1 to 0.4% of N is contained as an alloy component, the alloy strength is further improved.
(f) 合金成分としてCOを0.05〜3.0チ含
有させると、合金は一段と固溶強化および加工強化する
ようになると共に、耐応力腐食割れ性も向上するように
なること。(f) When 0.05 to 3.0 grams of CO is included as an alloy component, the alloy is further solid solution strengthened and work strengthened, and the stress corrosion cracking resistance is also improved.
<g> 合金成分としてCuを0.05〜3.0%含
゛有させると合金の強度および耐食性が一段と向上する
ようになること。<g> Including 0.05 to 3.0% of Cu as an alloy component further improves the strength and corrosion resistance of the alloy.
(h) 合金成分として希土類元素、特に望ましくは
原子番号57〜71の希土類元素のうちの1種または2
種以上(以下これらを総称して希土類元素という) :
0.001〜0.10チ、Y : 0.001〜0.
20 %、Mg : 0.001〜0.10 ’1r1
Ca :0.001〜0.10チ、およびTi:0.0
05〜050%のうちの1種または2種を含有させると
、合金の熱間加工性が一段と改善されるようになること
。(h) Rare earth elements as alloy components, particularly preferably one or two of the rare earth elements with an atomic number of 57 to 71.
Species or higher (hereinafter collectively referred to as rare earth elements):
0.001-0.10 inch, Y: 0.001-0.
20%, Mg: 0.001~0.10'1r1
Ca: 0.001-0.10chi, and Ti: 0.0
When one or two of the above 05% to 050% is contained, the hot workability of the alloy is further improved.
以上(a)〜01)に示される知見を得たのである。The findings shown in (a) to 01) above were obtained.
したがって、この発明は、上記知見にもとづいてなされ
たものであって、C:0.1%以下、Si:1.0チ以
下、Mn : 3.0〜15゜Ol、P:0.030チ
以下、S:0.010’%以下、son、 7M!:
0.5チ以下、Cr: 18.0〜22.5 チ、Ni
: 15.0〜40.0チ、N:0゜1〜0.4 %
を含有し、Mo : 4.0916以下およびW:S、
O*以下のうちの1種または2種を含有し、さらに必要
に応じて、Cn:0.05〜30チ、Cu : 0.0
5〜3.0 %、希土類元素: 0.001〜0.10
チ、Y : 0.001〜0.20チ、Mg:0−00
1〜0.10%、Ca: 0.001〜0−10 %、
およびTi:o、oos〜0.50チのうちの1種また
は2種以上を含有し、かつ、
Mo (%) +TW (1) : 1.5〜4.0
%、を満足1−:残りがFeとその他の不可避不純物か
らなる組成(以上重量%)を有する耐応力腐食割れ性に
優れた油井管用高強度合金に特徴を有するものである。Therefore, this invention was made based on the above findings, and includes: C: 0.1% or less, Si: 1.0% or less, Mn: 3.0-15°Ol, P: 0.030%. Below, S: 0.010'% or less, son, 7M! :
0.5 inch or less, Cr: 18.0 to 22.5 inch, Ni
: 15.0~40.0chi, N: 0°1~0.4%
Contains Mo: 4.0916 or less and W:S,
0
5-3.0%, rare earth elements: 0.001-0.10
Chi, Y: 0.001-0.20 chi, Mg: 0-00
1-0.10%, Ca: 0.001-0-10%,
and Ti: o, oos to 0.50 Ti, and Mo (%) + TW (1): 1.5 to 4.0.
%, satisfies 1-: The remainder is Fe and other unavoidable impurities (weight %), and the alloy is characterized by a high-strength alloy for oil country tubular goods having excellent stress corrosion cracking resistance.
つぎに、この発明の合金において、成分組成範囲を上記
の通シに限定した理由を説明する。Next, the reason why the composition range of the alloy of the present invention is limited to the above-mentioned range will be explained.
(a) C
C成分が0.1 %を越えて含有するようになると、粒
界に応力腐食割れが生じやすくなること赤ら、その含有
量の上限値を0.1%と定めた。(a) CC If the C component exceeds 0.1%, stress corrosion cracking tends to occur at grain boundaries, so the upper limit of its content was set at 0.1%.
缶) 5i
Si成分は脱酸成分として必要な成分であるが、その含
有量が1.0%を越えると熱間加工性および延性が劣化
するようになることから、その上限値を1.0係と定め
た0
(c) Kn
凧成分には、上記の通りNi、 Cr Mo、および
Wとの共存において制応力腐食割れ性を改善するほか、
冷間加工による強度向上を促進し、さらにNの固溶を促
進させる作用があるが、その含有量が3・0チ未満では
前記作用に所望の効果が得られず、一方15.0%を越
えて含有させると熱間加工性が劣化するようになること
から、その含有量を3.0〜15.01と定めた。5i Si component is a necessary component as a deoxidizing component, but if its content exceeds 1.0%, hot workability and ductility will deteriorate, so the upper limit value is set to 1.0%. 0 (c) Kn Kite component, as mentioned above, improves stress corrosion cracking resistance in coexistence with Ni, Cr, Mo, and W.
It has the effect of promoting strength improvement by cold working and further promoting the solid solution of N, but if the content is less than 3.0%, the desired effect cannot be obtained; Since hot workability deteriorates if the content exceeds the content, the content was set at 3.0 to 15.01.
(d) P
P成分には、応力腐食割れに対する感受性を高める作用
があり、この作用は、その含有量が0.030−を越え
ると大きく現われるようになることから、その上限値を
9.030 %と定めた。(d) P The P component has the effect of increasing the susceptibility to stress corrosion cracking, and this effect becomes significant when the content exceeds 0.030-. Therefore, the upper limit value has been set to 9.030- %.
(e) S
S成分には、合金の熱間加工性を劣化させる作用があり
、この作用は、その含有量が0.010%ケ越えると顕
著に現われる傾向にあり、したがってその含有量の上限
値を0.010%と定めた。(e) SS The S component has the effect of deteriorating the hot workability of the alloy, and this effect tends to become noticeable when its content exceeds 0.010%. Therefore, the upper limit of its content The value was set at 0.010%.
(f) 5o11.kl
AA’はSiと同様に脱酸成分として有効な成分であり
、soA、AA含有量で0.5チまで含有させても合金
特性を何らそこなうものではないことから、その含有量
の上限値を、so4 Allで0.5%と定めた0
(g) Cr
Cr成分には、庵、Ni、Mo、およびW成分との共存
において耐応力腐食割れ性を著しく改善する作用がある
が、その含有量が18.0%未満では所望の優れた耐応
力腐食割れ性を確保することができず、一方22.5
%を越えて含有させても150℃以下の&5−Co2−
C/−油井環境下ではよシ一層の向上効果が現われず、
また熱間加工性を劣化させる場合があることから、その
含有量を18.0〜22.5%を定めた。(f) 5o11. kl AA' is an effective component as a deoxidizing component similar to Si, and the upper limit of its content is set because it does not impair the alloy properties even if it is included up to 0.5% soA and AA content. is set at 0.5% for SO4 All (g) Cr The Cr component has the effect of significantly improving stress corrosion cracking resistance in coexistence with Iori, Ni, Mo, and W components; If the content is less than 18.0%, the desired excellent stress corrosion cracking resistance cannot be secured;
&5-Co2-
In the C/- oil well environment, no further improvement effect appears;
Moreover, since hot workability may be deteriorated in some cases, the content is determined to be 18.0 to 22.5%.
(h) Ni
Ni成分には合金の耐応力腐食割れ性を向上させ4作用
があるが、その含有量が15.01未満では所望の優れ
た耐応力腐食割れ性を確保することができず、また組織
面から熱間加工性を劣化させる場合があり、一方40.
0 %を越えて含有させても耐応力腐食割れ性によシ一
層の向上効果が現われないことから、経済性をも考慮し
て、その含有量を15.0〜40.0 %と定めた。(h) Ni The Ni component improves the stress corrosion cracking resistance of the alloy, but if its content is less than 15.01, the desired excellent stress corrosion cracking resistance cannot be ensured. In addition, hot workability may be deteriorated from the viewpoint of the structure, and on the other hand, 40.
Since even if the content exceeds 0%, no further improvement effect on stress corrosion cracking resistance will appear, so the content was set at 15.0 to 40.0%, taking economic efficiency into consideration. .
(i) N
N成分には、合金組織を改善し、かつ素地に固溶して、
これを強化する作用があるが、その含有量が0.1’%
未満では前記作用に所望の効果が得られず、一方0.4
%を越えると、合金の溶製および造塊が困難となること
から、その含有量を0.1〜0.4チと定めた。(i) N The N component improves the alloy structure and is dissolved in the base material.
It has the effect of strengthening this, but its content is 0.1'%
If it is less than 0.4, the desired effect cannot be obtained;
%, it becomes difficult to melt the alloy and form ingots, so the content was set at 0.1 to 0.4%.
(j) MoおよびW
上記の通り、これらの成分には、廊、Cr、およびNi
との共存において耐応力腐食割れ性を改善する均等的作
用があるが、Mo:4.0%およびW:&0チをそれぞ
れ越えて含有させても、特に150℃以下のH2s−c
ot−cz−油井環境ではよシ一層の向上効果が現われ
ないことから、経済性を考慮して、その含有量をMo
: 4−0 %以下、およびw:s、o*以下とそれぞ
れ定めた0
(ロ)C。(j) Mo and W As mentioned above, these components include Mo, Cr, and Ni.
There is a uniform effect of improving stress corrosion cracking resistance in coexistence with Mo: 4.0% and W: &0%.
Since no further improvement effect will be seen in the ot-cz-oil well environment, the content should be reduced in consideration of economic efficiency.
: 4-0% or less, and w:s, o* or less, respectively.
Co成分には、素地に固溶して、これを強化するばかシ
でなく、加工強化を促進し、さらに合金の耐応力腐食割
れ性を向上させる作用があるので、これらの特性が要求
される場合に必要に応じて含有されるが、その含有量が
o、o 596未満では前記作用に所望の向上効果が得
られないoしかしながらCoは高価であるため経済性を
考慮して、その含有量を0.05〜3.01と定めた。The Co component is required to have these characteristics because it does not simply dissolve into the base material and strengthen it, but also promotes work strengthening and improves the stress corrosion cracking resistance of the alloy. However, if the content is less than 596, the desired effect of improving the above action cannot be obtained. However, since Co is expensive, in consideration of economic efficiency, the content is was set at 0.05 to 3.01.
(If)Cu
Cu成分には、合金の強度および耐食性を向上させる作
用があるので、特にこれらの特性が要求される場合に必
要に応じて含有されるが、その含有量が0.051未満
では前記作用に所望の向上効果が現われず、一方3.0
チを越えて含有させると合金の熱間加工性が劣化するよ
うになることから、その含有量を0.05〜3.0 %
と定めた。(If) Cu The Cu component has the effect of improving the strength and corrosion resistance of the alloy, so it is included as necessary when these properties are particularly required, but if the content is less than 0.051, The desired improvement effect did not appear in the above action; on the other hand, 3.0
Since the hot workability of the alloy will deteriorate if the content exceeds
It was determined that
−希土類元素、Y、陶、Ca、およ′びTiこれらの成
分には、熱間加工性を改善する作用があるので、特に厳
しい条件下で熱間加工を行なう必要がある場合などに含
有されるが、その含有量がそれぞれ希土類元素:0.0
011未満、Y二0.0011未満、Mg: 0.00
1 嗟未満、Ca:α001−未満、およびTi:0.
005%未満では所望の熱間加工性改善効果が得られず
、一方希土類元素=0.101、Y : 0.209I
I1Mg: 0.1 G To、 Ca:0.10 係
、およびTi : 0.50 %をそれぞれ越えて含有
させると、せっかくの熱間加工性改善効果に劣化傾向が
現われるようになることから、それぞれの含有量を、希
土類元素:0.001〜0.10%、Y : 0.00
1〜0.20嗟、Mg:0.001〜0.10*、 C
a: 0.001〜0.1091y、およびTi :
0.005〜0.50チと定めた。- Rare earth elements, Y, ceramics, Ca, and Ti These components have the effect of improving hot workability, so they should be included when hot working is required under particularly severe conditions. However, the content of rare earth elements: 0.0
Less than 0.011, Y2 less than 0.0011, Mg: 0.00
less than 1 mo, Ca: less than α001-, and Ti: 0.
If the content is less than 0.005%, the desired hot workability improvement effect cannot be obtained; on the other hand, rare earth element = 0.101, Y: 0.209I
If the content exceeds I1Mg: 0.1%, Ca: 0.10%, and Ti: 0.50%, a tendency for deterioration will appear in the hot workability improvement effect. The content of rare earth elements: 0.001-0.10%, Y: 0.00
1-0.20 嗟, Mg: 0.001-0.10*, C
a: 0.001-0.1091y, and Ti:
It was set at 0.005 to 0.50 inches.
l w <チ)
第1図は、厳しい腐食環境下、すなわちH2S−cot
−cz−油井環境に相当する環境下での耐応力腐食割れ
性に関して、Cr (%) + MO(%) + 2
W (% )と−7Mn (%) 十Ni (*)との
関係を示したものである。l w < h) Figure 1 shows the test results under a severe corrosive environment, that is, H2S-cot.
-cz- Regarding stress corrosion cracking resistance under an environment equivalent to an oil well environment, Cr (%) + MO (%) + 2
It shows the relationship between W (%) and -7Mn (%) 10Ni (*).
すなわち、胤、Cr、 Ni、 Mo、およびWの含有
量を種々変化させたFe−Mn−Cr−Ni−Mo系、
Fe −Mn −Cr−Ni−W系、およびFe−Mn
−Cr−Ni−Mo−W系の合金を溶製し、鋳造し、鍛
伸および熱間圧延を施して板厚:12■の熱延板とし、
ついでこの熱延板に、温度:1075℃に30分間保持
後水冷の゛溶体化処理を施した後、強度向上の目的で、
加工率:25チの冷間加工を施し、この結果得られた冷
延板から圧延方向と直角に、厚さ:2閣×幅:10mm
X長さニア5m+の試験片を切り出し、この試験片につ
いて、第2図に来す3点支持ビーム治具を用い、前記試
験片Sに降伏強さく 0.2 %耐力)に相当する引張
応力を付加した状態で、FI2sを5気圧の圧力で、c
o2を10気圧の圧力で飽和させた5 4 NaCノ溶
液(温度:150’C)中に960時間浸漬の応力腐食
割れ試験を行ない、試験後、前記試験片における割れ発
生の有無を観察した。That is, Fe-Mn-Cr-Ni-Mo system with various contents of Cr, Ni, Mo, and W;
Fe-Mn-Cr-Ni-W system, and Fe-Mn
- Cr-Ni-Mo-W alloy is melted, cast, forged and hot-rolled to form a hot-rolled plate with a thickness of 12cm,
Next, this hot-rolled sheet was subjected to solution treatment by holding it at a temperature of 1075°C for 30 minutes and cooling with water, and then, for the purpose of improving strength,
Processing rate: 25 inches of cold working, and from the resulting cold-rolled plate, perpendicular to the rolling direction, thickness: 2 mm x width: 10 mm
A test piece with a length of X near 5 m+ was cut out, and a tensile stress corresponding to the yield strength (0.2% proof stress) was applied to the test piece S using the three-point support beam jig shown in Figure 2. With the addition of FI2s at a pressure of 5 atm, c
A stress corrosion cracking test was conducted by immersing the specimen in a 5 4 NaC solution (temperature: 150'C) saturated with O2 at a pressure of 10 atm for 960 hours, and after the test, the presence or absence of cracking in the test piece was observed.
(1) 十Mo (%l+TW(チ)との関係において
プロットしたところ、応力腐食割れに関して第1図に示
される結果を示したのである。なお、第1図において、
○印は割れ発生なし、X印は割れ発生あシをそれぞれ示
すものである。第1図に示される結未満にして、TMn
(%) +Ni (%)の値が18チ未滴の範囲では
所望の耐応力腐食割れ性が得られないことが明らかであ
る。以上の結果から、優れた耐応力腐食割れ性を確保す
るためには、Cr (%) +M。(1) When plotted in relation to 10Mo(%l+TW(chi)), the results shown in Figure 1 regarding stress corrosion cracking were shown.In Figure 1,
○ marks indicate no cracks, and X marks indicate cracks. TMn below the result shown in FIG.
It is clear that the desired stress corrosion cracking resistance cannot be obtained when the value of (%) +Ni (%) is less than 18 inches. From the above results, in order to ensure excellent stress corrosion cracking resistance, Cr (%) +M.
(1) +−!−w (%) : 2056以上、−!
−Mn (*) +Ni (%):2
18チ以上とする必要がある。(1) +-! -w (%): 2056 or more, -!
-Mn (*) +Ni (%): 2 Must be 18 or more.
MoとWの含有量に関して、MO(qb) + 2 W
(% )で規定するのは、Wが廁に対し原子量が約2
倍で、効果の点では約半分で均等となることからで、こ
の値が1.5−未満では所望の耐応力腐食割れ性を確保
することができず、一方、この値が4.0 %を越えて
MoおよびWを含有させても、上記の通りより一層の耐
応力腐食割れ性向上効果は現われず、実質的に不必要な
童の励およびWの含有となり、コスト高の原因となって
経済的でないことから、MO(qb)+TW(%)の値
を1.5〜4.0チと定めた。Regarding the content of Mo and W, MO(qb) + 2 W
It is specified in (%) that the atomic weight of W is approximately 2
If this value is less than 1.5%, the desired stress corrosion cracking resistance cannot be secured; on the other hand, if this value is less than 4.0% Even if Mo and W are contained in amounts exceeding the above, the effect of further improving stress corrosion cracking resistance will not appear as described above, and the content of W will be substantially unnecessary, resulting in increased costs. Since this is not economical, the value of MO (qb) + TW (%) was set at 1.5 to 4.0.
なお、この発明の合金鋼において、その他のミ可避不純
物としてB −Sn、Pbs およびZnをそれぞれ0
・05チ以下の範囲で含有しても、この発明の合金−の
特性が伺らそこなわれるものではない。In addition, in the alloy steel of this invention, B-Sn, Pbs, and Zn are each 0 as other avoidable impurities.
- Even if the content is in the range of 0.05 mm or less, the properties of the alloy of the present invention will not be impaired.
また、この発明の合金鋼よシ油井管を製造するに際して
は、まず通常の電気炉、アルゴン−酸素脱炭炉(AOD
炉)、エレクトロスラグ溶解炉(ESR炉)などを使用
して所定の成分組成を有する溶釧を溶製し、重量: 2
ton程度の鋼塊としだ後、1050〜1250℃の
温度に均熱した状態で、直径:150〜300mmφの
ビレットに分塊し、引続いて1050〜1250℃の温
度に加熱し、熱間加工によって管材とされるが、その際
強度を付与する目的で、再結晶の進まない1000℃以
下の温度範囲での肉厚減少率が30チ以上となる条件で
熱間加工することによって管材とする工程が好ましい。In addition, when manufacturing the alloy steel oil country tubular goods of the present invention, first a normal electric furnace, an argon-oxygen decarburization furnace (AOD)
A molten kettle having a predetermined composition is melted using an electroslag melting furnace (ESR furnace), weight: 2
After pouring into a steel ingot of approximately 1,000 ton, it is soaked at a temperature of 1,050 to 1,250°C and then bloomed into a billet with a diameter of 150 to 300 mmφ. However, in order to add strength, it is made into a pipe material by hot working under conditions such that the wall thickness reduction rate is 30 inches or more in a temperature range of 1000 degrees Celsius or less, where recrystallization does not proceed. The process is preferred.
この結果の管材は、熱間加工ままの状態か、あるいld
850〜1150℃の温度で溶体化処理した状態で、
さらに肉厚減少率:5〜70チ、望ましくは10〜50
チの塔間加工を施した状態で実用に供されるが、この状
態の管材は、降伏強さく0.2チ耐力)=70kgf/
繻以上の高強度を有し、かつ延性および靭性は勿論のこ
と耐応力腐食割れ性に優れたものである。The resulting tubing can be either as-hot-worked or
After solution treatment at a temperature of 850 to 1150°C,
Furthermore, wall thickness reduction rate: 5 to 70 inches, preferably 10 to 50 inches
The pipe material in this state is put into practical use after being subjected to 2-column processing, but the yield strength of the pipe material in this state is 0.2 mm yield strength) = 70 kgf/
It has a strength higher than that of satin, and has excellent ductility and toughness as well as stress corrosion cracking resistance.
つぎに、この発明の合金君を実施例によル比較例と対比
しながら説明する。Next, the alloy of the present invention will be explained using examples and comparing with comparative examples.
実施例
それぞれ第1表に示される成分組成をもった溶鋼を通常
の溶解法にて調製した後、−塊となし、との鋼塊を10
50〜1200℃の温度に均熱後熱間鍛造を施してビレ
ットとした。このとき熱間加工性を評価する目的でビレ
ットに割れの発生があるか否かを観察した。ついでビレ
ットを中ぐシした後1050〜1200℃の温度に加熱
して、熱間押出加工を施して管材とし、さらにこの管材
に、強・一度を付与する目的で、熱間加工ままの状態も
しくは1050〜1125℃の温度で溶体化処理した状
態で、同じく第1表に示される肉厚残少率にて冷間抽伸
加工を施すことによって、外径:60.3mmφ×肉厚
:51[1mの本発明合金・筒材1〜3゜比較合金管材
1〜10、および従来合金管材1〜4をそれぞれ製造し
た。In each example, molten steel having the composition shown in Table 1 was prepared by a normal melting method, and then 10 pieces of steel ingots were prepared.
After soaking at a temperature of 50 to 1200°C, hot forging was performed to obtain a billet. At this time, it was observed whether or not cracks occurred in the billet for the purpose of evaluating hot workability. The billet is then milled, heated to a temperature of 1,050 to 1,200°C, and subjected to hot extrusion processing to form a tube material.Furthermore, for the purpose of imparting strength and strength to this tube material, it is heated to a temperature of 1050 to 1200 ° C. After solution treatment at a temperature of 1,050 to 1,125°C, cold drawing was performed at the wall thickness remaining ratio shown in Table 1 to obtain an outer diameter of 60.3 mmφ x wall thickness of 51 [1 m]. Comparative alloy tube materials 1 to 10 and conventional alloy tube materials 1 to 4 were manufactured, respectively.
なお、比較合金管材1〜10は、いずれも構成成分のう
ちのいずれかの成分含有量あるいは条件式(第1表に秦
印を付して表示)がこの発明の範囲から外れた構成をも
つものであり、また従来合金管材1は5US316に、
従来合金管材2はS U S 310Sに、従来合金管
材3はSUS 329J1に、さらに従来合金管材4は
インコロ′イ800にそれぞれ相当する組成をもつもの
である。In addition, Comparative Alloy Tube Materials 1 to 10 all have a configuration in which the content of one of the constituent components or the conditional expression (indicated with a square mark in Table 1) is outside the scope of the present invention. Also, the conventional alloy tube material 1 is 5US316,
The conventional alloy tube material 2 has a composition corresponding to SUS 310S, the conventional alloy tube material 3 to SUS 329J1, and the conventional alloy tube material 4 to Incoloy 800.
ついで、この結果得られた各種の管材より長さ:20m
mの試験片をそれぞれ切出し、この試験片よシ長さ方向
にそって中心角で60°に相当する部分を切落し、この
状態の試験片に第3図に正面図で示されるようにがルト
を貫通し、ナツトで締めつけて管外表面に降伏強さく0
.2%耐力)に相当する引張応力を付加し、この状態の
試験片Sに対して、&Sをそれぞれ0.1気圧、1気圧
、および10気圧で、C)をいずれも10気圧で含有さ
せた311OHtS−Cot含有の51 NaCJ溶液
(液温:150℃)中’C960時間浸漬の応力腐食割
れ試験を行ない、試験後における応力腐食割れの有無を
観察した。これらの結果を、上記の熱間鍛造時の割れ発
生の有無、降伏強さく 0.2 係耐力)、および伸び
と共に、第2表に合せて示した。なお、第2表において
、O印はいずれも割れ発生のない場合、X印は割れ発生
のある場合、を示すものであへ。Next, the length: 20 m was obtained from the various pipe materials obtained as a result.
A test piece of m is cut out, and a portion corresponding to a central angle of 60° is cut along the length of the test piece. Pass through the pipe bolt and tighten with a nut to create a yield strength of 0 on the outer surface of the pipe.
.. A tensile stress equivalent to 2% proof stress) was applied, and to the test piece S in this state, &S was added at 0.1 atm, 1 atm, and 10 atm, respectively, and C) was added at 10 atm in each case. A stress corrosion cracking test was carried out by immersion in a 51 NaCJ solution (liquid temperature: 150° C.) containing 311OHtS-Cot for 960 hours, and the presence or absence of stress corrosion cracking after the test was observed. These results are shown in Table 2, along with the presence or absence of cracking during hot forging, yield strength (0.2 yield strength), and elongation. In Table 2, the O marks indicate cases where no cracks have occurred, and the X marks indicate cases where cracks have occurred.
第2表に示される結果から、比較合金管材1〜10は、
熱間加工性、耐応力腐食割れ性、および強度のうちの少
なくともいずれかの性質が劣ったものであるのに対して
、本発明合金管材1〜30は、いずれも高強度および高
延性、並びに優れた熱間加工性および耐応力腐食割れ性
を有し、特に腐食条件の厳しい10気圧+42!(−1
0気圧C(32−54NaC6溶液中でも割れ発生は皆
無であり、相対的に耐応力腐食割れ性に劣る従来合金管
材1〜4と比較しても一段とすぐれた特性を有すること
が明ら゛かである。From the results shown in Table 2, comparative alloy tube materials 1 to 10 are as follows:
In contrast, the alloy tube materials 1 to 30 of the present invention all have high strength, high ductility, and poor properties in at least one of hot workability, stress corrosion cracking resistance, and strength. It has excellent hot workability and stress corrosion cracking resistance, and is suitable for particularly severe corrosion conditions of 10 atmospheres + 42! (-1
There was no cracking even in 0 atm C (32-54 NaC6 solution), and it is clear that the material has even better properties than conventional alloy pipe materials 1 to 4, which have relatively poor stress corrosion cracking resistance. be.
上述のように、この発明の合金は、特に高強度並びに優
れた耐応力腐食割れ性を有しているので、これらの特性
が要求される苛酷な環境下での石油および天然ガス採掘
に用いられる油井管として、さらに地熱井管などとして
使用した場合にきわめて優れた性能を発揮するのである
。As mentioned above, the alloy of the present invention has particularly high strength and excellent stress corrosion cracking resistance, so it can be used in oil and natural gas extraction in harsh environments where these properties are required. It exhibits extremely excellent performance when used as oil country tubular goods and geothermal country tubular goods.
(%) +Ni (*)とCr(%) +M+1 (%
) 十’W (%)との関係を示した図、vX2図およ
び第3図はそれぞれ板状および管状試験片を用いる応力
腐食割れ試験の態様を示す正面図である。
出願人 住友金属工業株式会社(%) +Ni (*) and Cr (%) +M+1 (%
) A diagram showing the relationship with 10'W (%), a vX2 diagram, and FIG. 3 are front views showing aspects of stress corrosion cracking tests using plate-shaped and tubular test pieces, respectively. Applicant: Sumitomo Metal Industries, Ltd.
Claims (1)
%以下、Mn :3.(J〜15.0%、P:(1,0
30チ以下、S:0.010チ以下、go/、Ag:
0.5 %以下、Cr : 18.0〜22.5チ、N
i : 15.0〜40.0チ、N : 0.1〜0.
4チを菖°南し、Mo:4.0%1゛支丁およびW:S
、0%以下のうちの144または2種を含有し、かつ、
Cr (%) +Mo (%) −1−”W (%)
: 204以上、Mo (%) + 2 W (%)
: 1.5〜4.0%1、を満足し、残りがF’eとそ
の他の不可避不純物からなる組成(以上重置チ)を有す
ることを特徴と′する耐食性の優れた油井管用高強度合
金。 12) C: 0.1 %以下、Si : 1−0
’%%以下Mn:3.0〜15.0チ、P:帆030チ
1】ノ下、S : 0.+110% 、PL下、sat
、 Ad : 0.5%以下、C,r : ] 8.0
〜22.5チ、Ni : l 5.0〜40.0%、N
:11.1〜0.4%を含有し、Mo : 4−04以
下およびw : 8.0 %以下のうちの1種または2
種を含イ酉〜、さらにCo:0.05〜3,0チを含有
し、かつ。 Cr (%) +Mo (旬+ TW (1: 204
以上、M・)(チ)+−HW(チ) : 1.5〜4.
0%。 を満足し、残りがFeとその他の不0工避不純物からな
る組成(以上電歇%)を有することを特徴とする耐食性
の優ルた油井管用高強度合金。 (3) C: 0.1 %以下、St : 1.0%以
下、Mn:3.0〜15.0%、P:帆()30%以ド
、S : 0.010チ以下、sol?、Ali!:
0.5 %以下、Cr : 18.0〜22.5チ、N
i:15.0〜40.0%、N : oa1〜0.4%
を含有し、Mo:4.0%以下およびW:8.0%以下
のうちの1種または2柚を含有17、さらにCu:0.
05〜3.0 %を含有し、かつ、 2 Mn(%)+Ni (’%) : 184以上、M
o (’1) 橿−、1V (剣 : 1.5
〜4.0 タロ、をi14足し、残りがIi′eと
その他の不可避不純物からなる組成(以上重量%)を有
することを特徴とする耐食性の優れた油井管用高強度合
金。 1/11 C: 0.1 %以下、Si:1.0%以
下、Mn :3.(1〜15.0 %、P : 0.0
301以下、S : 0.010%以下、soe、 A
l : 0.5 %以下、Cr : 18.0〜22.
5s、Ni : 15.0〜40.0 To、N :
0.1〜0.4 Lt−含有し、Mo:4.0%以下お
よびW:8.Q%以下のうちの1楕または2種を含有し
、さらに希土類元素: 0.001〜0.10 %、Y
:0.001〜0.20チ、Mg: 0.001〜0.
10 %、Ca: 0.001〜0.10チ、および’
17i : 0.005〜0.50チのうちの1種また
は2種以上を含有し、かつ、TN’In (%) +N
t (%)=18%以上、Mo、 (%) + 2 W
(%) : 1.5〜4.0 %、を満足し、残りが
Feとその他の不可避不純物からなる組成(以上型Il
t%)を有することを特徴とする耐食性の優れた油井管
用高強度合金。 (5) C: 0.1 %以下、Si:1.0%以下
、Mn :3.0〜15.0%、P : 0.030チ
以下、S : 0.010チ以下、soA!、 AJ:
0.5 %以下、Cr : 18.0〜22.5チ、
Ni:15.0〜40.0チ、N:0.1〜0.4 %
を含有し、Mo:4−0チ以下およびW:Q、0%以下
のうちの1種または2種を含有し、さらにCo : 0
.05〜3.OlおよびCu : 0.−05〜3.0
1+を含有し、かつ、Mo (%) + 2 W (%
) : 1.5〜4.0%、を満足し、残シがFeとそ
の他の不可避不純物からなる組成(以上重量tIb)を
有することを特徴とする耐食性の優れた油井管用高強度
合金。 (6) C: 0.1 %以下、Si:1−Q%以下
、Mn:3.0〜15.0%、p : o、o a o
%%以下S : 0.010チ以下、txol、AI
: 0.5 %以下、Or : 18.0〜22.5チ
、Ni:15.0〜40.0チ、N:0.1〜0.4チ
を含有し、Mo:4−096以下およびW:S、O*%
以下うちの1種または2種を含有し、さらにCo :
0.05〜3.0%と、希土類元素: 0.001−0
.i 0%、Y:0.001〜0.20%、big:
0.1) 01〜0.10チ、Ca: 0.001〜
0.10 %、およびri:00115〜0.50%の
うちの1棟または2′種以上とをW有L6、かつ、 HMn (%)+Ni (%) : 181以上、Mo
(%) +TW (%) : 1.5〜4.0%、を
(14足し、残りがFeとその他の不可避不純物からな
る組成(以上型にチ)を有することを特徴とする耐食性
の優れた油井管用高強度合金。 (7) ’C: o、t S Lu下、Si:1.0
%以下、Pi’in :3.0〜15.0%、P :
0.030%以下、S:0010チ以下、sob、 A
d : 0.5 ’ir以下、Cr : 18.0〜2
2.5チ、Ni : l 5.0〜40.0 %、N:
0.1〜0.4%を含有し、Mo : 4.0 %以下
およびW : 8.0 %以下のうちの1種または2f
iiを含有し、さらにCu:0.05〜3.0 %と、
希土類元素: o、o o i 〜o、t o%。 Y : 0.001〜0.20%、Mg: 0.001
〜0.t Oチ、Ca: 0.001〜0.10 %、
およびTi : ’0.005〜0,50 %のうちの
1種または2種以上とを含有し、かつ、 Mo 0%) +−!−w (%)、 : 1.5〜4
−Q 96、を満足し、残シがFeとその他の不可避不
純物からなる組成(以上重量%)を有することを特徴と
する耐食性の優れた油井管用高強度合金。 tdl C: 0.1 fo以下、Si:1.Q%以
下、Mn:LO〜15.0チ、P :’0.030チ以
下、S:0.010−以下、so4 )J : 0.5
96以下、Cr : 18.0〜22.5チ、Ni:1
5.0〜40.01 N : 0.1〜0.4%を含有
し、Mo : 4−0 ’it以下およびW:8.0%
以下のうちの1種または2種を含有し、さらにCo:0
.05〜3.0 %と、 Cu: o、o 5〜3.0
チと、希土類元素: 0.001〜0.10チ、Y:0
.001〜0.20チ、Mg: 0.001〜0.10
to、Ca: 0.001〜O−10嗟、″およびT
i : 0.005〜0.50%のうちの1種ま次は2
種以上とを含有し、かつ、 ”Mn (%) +Ni (%):18%以上、1 Mo (%) +TW (%) : 1.5〜4.0
%、を満足し、残りがFi’eとその他の不可避不純物
からするJll成(−昼上萼、量チ)を有することを特
徴とする耐食性の優れた油井管用高強度合金。[Claims] +l) C: 0.1% or less, St: 1.0
% or less, Mn: 3. (J ~ 15.0%, P: (1,0
30 inches or less, S: 0.010 inches or less, go/, Ag:
0.5% or less, Cr: 18.0-22.5chi, N
i: 15.0~40.0ch, N: 0.1~0.
4th inch south, Mo: 4.0% 1゛ branch and W: S
, contains 144 or 2 of 0% or less, and
Cr (%) +Mo (%) -1-”W (%)
: 204 or more, Mo (%) + 2 W (%)
: High strength for oil country tubular goods with excellent corrosion resistance, characterized by having a composition satisfying 1.5 to 4.0% 1, with the remainder consisting of F'e and other unavoidable impurities. alloy. 12) C: 0.1% or less, Si: 1-0
'%% or less Mn: 3.0-15.0chi, P: Sail 030chi1], S: 0. +110%, below PL, sat
, Ad: 0.5% or less, C, r: ] 8.0
~22.5chi, Ni: l 5.0~40.0%, N
: 11.1 to 0.4%, one or two of Mo: 4-04 or less and w: 8.0% or less
Contains seeds, further contains Co:0.05-3.0, and. Cr (%) +Mo (season + TW (1: 204
Above, M・)(chi)+-HW(chi): 1.5 to 4.
0%. 1. A high-strength alloy for oil country tubular goods having excellent corrosion resistance, which satisfies the above requirements and has a composition with the remainder consisting of Fe and other unavoidable impurities. (3) C: 0.1% or less, St: 1.0% or less, Mn: 3.0 to 15.0%, P: 30% or more, S: 0.010% or less, sol? , Ali! :
0.5% or less, Cr: 18.0-22.5chi, N
i: 15.0-40.0%, N: oa1-0.4%
17, containing one or two of Mo: 4.0% or less and W: 8.0% or less, and Cu: 0.
05 to 3.0%, and 2 Mn (%) + Ni ('%): 184 or more, M
o ('1) Kashi-, 1V (Sword: 1.5
A high-strength alloy for oil country tubular goods having excellent corrosion resistance, characterized in that it has a composition (the above weight %) consisting of i14 of ~4.0 taro and the remainder consisting of Ii'e and other unavoidable impurities. 1/11 C: 0.1% or less, Si: 1.0% or less, Mn: 3. (1-15.0%, P: 0.0
301 or less, S: 0.010% or less, soe, A
l: 0.5% or less, Cr: 18.0-22.
5s, Ni: 15.0-40.0 To, N:
Contains 0.1 to 0.4 Lt-, Mo: 4.0% or less, and W: 8. Contains one or two of Q% or less, and further contains rare earth elements: 0.001 to 0.10%, Y
: 0.001~0.20chi, Mg: 0.001~0.
10%, Ca: 0.001-0.10ch, and '
17i: Contains one or more of 0.005 to 0.50, and TN'In (%) +N
t (%) = 18% or more, Mo, (%) + 2 W
(%): 1.5 to 4.0%, with the remainder consisting of Fe and other unavoidable impurities (the above type Il
A high-strength alloy for oil country tubular goods having excellent corrosion resistance. (5) C: 0.1% or less, Si: 1.0% or less, Mn: 3.0 to 15.0%, P: 0.030 or less, S: 0.010 or less, soA! , AJ:
0.5% or less, Cr: 18.0-22.5chi,
Ni: 15.0~40.0chi, N: 0.1~0.4%
Contains one or two of Mo: 4-0% or less and W:Q, 0% or less, and further Co: 0
.. 05-3. Ol and Cu: 0. -05~3.0
1+ and Mo (%) + 2 W (%
): 1.5 to 4.0%, and has a composition (weight tIb) with the remainder consisting of Fe and other unavoidable impurities. (6) C: 0.1% or less, Si: 1-Q% or less, Mn: 3.0-15.0%, p: o, o a o
%% or less S: 0.010 or less, txol, AI
: 0.5% or less, Or: 18.0 to 22.5 inches, Ni: 15.0 to 40.0 inches, N: 0.1 to 0.4 inches, Mo: 4-096 or less, and W: S, O*%
Contains one or two of the following, and further contains Co:
0.05-3.0% and rare earth elements: 0.001-0
.. i 0%, Y: 0.001-0.20%, big:
0.1) 01~0.10chi, Ca: 0.001~
0.10%, and 1 or 2' or more of ri: 00115 to 0.50%, W with L6, and HMn (%) + Ni (%): 181 or more, Mo
(%) +TW (%): 1.5 to 4.0%, (add 14, and the remainder consists of Fe and other unavoidable impurities. High strength alloy for oil country tubular goods. (7) 'C: o, t S Lu lower, Si: 1.0
% or less, Pi'in: 3.0-15.0%, P:
0.030% or less, S:0010 or less, sob, A
d: 0.5'ir or less, Cr: 18.0~2
2.5chi, Ni: 5.0-40.0%, N:
Contains 0.1 to 0.4%, one type or 2f of Mo: 4.0% or less and W: 8.0% or less
ii, further containing Cu: 0.05 to 3.0%,
Rare earth elements: o, o o i ~ o, to%. Y: 0.001-0.20%, Mg: 0.001
~0. tOchi, Ca: 0.001-0.10%,
and Ti: '0.005 to 0.50%, and Mo 0%) +-! -w (%): 1.5~4
A high-strength alloy for oil country tubular goods having excellent corrosion resistance, which satisfies Q96 and has a composition (the above weight %) consisting of Fe and other unavoidable impurities. tdl C: 0.1 fo or less, Si: 1. Q% or less, Mn: LO ~ 15.0chi, P: '0.030chi or less, S: 0.010- or less, so4) J: 0.5
96 or less, Cr: 18.0-22.5chi, Ni: 1
Contains 5.0-40.01 N: 0.1-0.4%, Mo: 4-0'it or less and W: 8.0%
Contains one or two of the following, and further Co:0
.. 05-3.0%, Cu: o, o 5-3.0
Chi and rare earth elements: 0.001 to 0.10 Chi, Y: 0
.. 001~0.20chi, Mg: 0.001~0.10
to, Ca: 0.001~O-10嗟,'' and T
i: 1 type from 0.005 to 0.50%, then 2
``Mn (%) + Ni (%): 18% or more, 1 Mo (%) + TW (%): 1.5 to 4.0
%, with the remainder consisting of Fi'e and other unavoidable impurities.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9232782A JPS58210155A (en) | 1982-05-31 | 1982-05-31 | High-strength alloy for oil well pipe with superior corrosion resistance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9232782A JPS58210155A (en) | 1982-05-31 | 1982-05-31 | High-strength alloy for oil well pipe with superior corrosion resistance |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS58210155A true JPS58210155A (en) | 1983-12-07 |
JPH0372698B2 JPH0372698B2 (en) | 1991-11-19 |
Family
ID=14051283
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9232782A Granted JPS58210155A (en) | 1982-05-31 | 1982-05-31 | High-strength alloy for oil well pipe with superior corrosion resistance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58210155A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6456857A (en) * | 1987-08-28 | 1989-03-03 | Nippon Kokan Kk | Alloy for oil well tube excellent in corrosion resistance and strength |
JPH01228603A (en) * | 1988-03-10 | 1989-09-12 | Sumitomo Metal Ind Ltd | Manufacture of two-phase stainless steel seamless tube |
WO2009044758A1 (en) | 2007-10-03 | 2009-04-09 | Sumitomo Metal Industries, Ltd. | HIGH-STRENGTH Cr-Ni ALLOY PRODUCT AND SEAMLESS OIL WELL PIPES MADE BY USINFG THE SAME |
WO2010113843A1 (en) | 2009-04-01 | 2010-10-07 | 住友金属工業株式会社 | Method for producing high-strength seamless cr-ni alloy pipe |
WO2015072458A1 (en) | 2013-11-12 | 2015-05-21 | 新日鐵住金株式会社 | Ni-Cr ALLOY MATERIAL AND OIL WELL SEAMLESS PIPE USING SAME |
WO2021070735A1 (en) | 2019-10-10 | 2021-04-15 | 日本製鉄株式会社 | Alloy material and seamless pipe for oil well |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS581044A (en) * | 1981-06-24 | 1983-01-06 | Sumitomo Metal Ind Ltd | High strength alloy having superior stress corrosion cracking resistance for oil well pipe |
JPS581043A (en) * | 1981-06-24 | 1983-01-06 | Sumitomo Metal Ind Ltd | High strength alloy having superior stress corrosion cracking resistance for oil well pipe |
JPS581042A (en) * | 1981-06-24 | 1983-01-06 | Sumitomo Metal Ind Ltd | High strength alloy having superior stress corrosion cracking resistance for oil well pipe |
-
1982
- 1982-05-31 JP JP9232782A patent/JPS58210155A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS581044A (en) * | 1981-06-24 | 1983-01-06 | Sumitomo Metal Ind Ltd | High strength alloy having superior stress corrosion cracking resistance for oil well pipe |
JPS581043A (en) * | 1981-06-24 | 1983-01-06 | Sumitomo Metal Ind Ltd | High strength alloy having superior stress corrosion cracking resistance for oil well pipe |
JPS581042A (en) * | 1981-06-24 | 1983-01-06 | Sumitomo Metal Ind Ltd | High strength alloy having superior stress corrosion cracking resistance for oil well pipe |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6456857A (en) * | 1987-08-28 | 1989-03-03 | Nippon Kokan Kk | Alloy for oil well tube excellent in corrosion resistance and strength |
JPH01228603A (en) * | 1988-03-10 | 1989-09-12 | Sumitomo Metal Ind Ltd | Manufacture of two-phase stainless steel seamless tube |
JPH0569603B2 (en) * | 1988-03-10 | 1993-10-01 | Sumitomo Metal Ind | |
WO2009044758A1 (en) | 2007-10-03 | 2009-04-09 | Sumitomo Metal Industries, Ltd. | HIGH-STRENGTH Cr-Ni ALLOY PRODUCT AND SEAMLESS OIL WELL PIPES MADE BY USINFG THE SAME |
US8071020B2 (en) | 2007-10-03 | 2011-12-06 | Sumitomo Metal Industries, Ltd. | High strength Cr-Ni alloy material and seamless pipe for oil well |
WO2010113843A1 (en) | 2009-04-01 | 2010-10-07 | 住友金属工業株式会社 | Method for producing high-strength seamless cr-ni alloy pipe |
WO2015072458A1 (en) | 2013-11-12 | 2015-05-21 | 新日鐵住金株式会社 | Ni-Cr ALLOY MATERIAL AND OIL WELL SEAMLESS PIPE USING SAME |
KR20160082534A (en) | 2013-11-12 | 2016-07-08 | 신닛테츠스미킨 카부시키카이샤 | Ni-Cr ALLOY MATERIAL AND OIL WELL SEAMLESS PIPE USING SAME |
US10557574B2 (en) | 2013-11-12 | 2020-02-11 | Nippon Steel Corporation | Ni—Cr alloy material and seamless oil country tubular goods using the same |
WO2021070735A1 (en) | 2019-10-10 | 2021-04-15 | 日本製鉄株式会社 | Alloy material and seamless pipe for oil well |
Also Published As
Publication number | Publication date |
---|---|
JPH0372698B2 (en) | 1991-11-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
SE454360B (en) | ALLOY FOR DEEP DRILLING AND USE OF THIS FOR FOOD AND ROWS FOR DEEP DRILLING | |
JPS6230860A (en) | Free-cutting austenitic stainless steel | |
JPS625977B2 (en) | ||
JPS625976B2 (en) | ||
JPS58210158A (en) | High-strength alloy for oil well pipe with superior corrosion resistance | |
JPS58210155A (en) | High-strength alloy for oil well pipe with superior corrosion resistance | |
JPS6144133B2 (en) | ||
JPS6199660A (en) | High strength welded steel pipe for line pipe | |
JPS6363608B2 (en) | ||
JPS6144135B2 (en) | ||
JPS6362569B2 (en) | ||
JPS61113749A (en) | High corrosion resistance alloy for oil well | |
JPS6363610B2 (en) | ||
JPS581044A (en) | High strength alloy having superior stress corrosion cracking resistance for oil well pipe | |
JPS61104054A (en) | High-strength and high-toughness welded clad steel pipe for line pipe | |
JP3470418B2 (en) | High strength austenitic alloy with excellent seawater corrosion resistance and hydrogen sulfide corrosion resistance | |
JPS6363609B2 (en) | ||
JPS6363606B2 (en) | ||
JPS6144134B2 (en) | ||
JPS6144126B2 (en) | ||
JPS6199656A (en) | High strength welded steel pipe for line pipe | |
JPH0372699B2 (en) | ||
JPS6144125B2 (en) | ||
JPS581043A (en) | High strength alloy having superior stress corrosion cracking resistance for oil well pipe | |
JPS58210157A (en) | High-strength alloy for oil well pipe with superior corrosion resistance |