JPS58199850A - Martensitic stainless steel for acidic oil well - Google Patents
Martensitic stainless steel for acidic oil wellInfo
- Publication number
- JPS58199850A JPS58199850A JP8202582A JP8202582A JPS58199850A JP S58199850 A JPS58199850 A JP S58199850A JP 8202582 A JP8202582 A JP 8202582A JP 8202582 A JP8202582 A JP 8202582A JP S58199850 A JPS58199850 A JP S58199850A
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- martensitic stainless
- resistance
- acidic oil
- corrosion
- 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
- 239000003129 oil well Substances 0.000 title claims abstract description 20
- 229910001105 martensitic stainless steel Inorganic materials 0.000 title claims abstract description 17
- 230000002378 acidificating effect Effects 0.000 title claims abstract description 13
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 9
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 6
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 5
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 abstract description 40
- 230000007797 corrosion Effects 0.000 abstract description 40
- 238000005336 cracking Methods 0.000 abstract description 17
- 239000000463 material Substances 0.000 abstract description 10
- 229910052748 manganese Inorganic materials 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 229910052802 copper Inorganic materials 0.000 abstract description 5
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 229910001566 austenite Inorganic materials 0.000 abstract description 3
- 229910052759 nickel Inorganic materials 0.000 abstract description 3
- 239000010935 stainless steel Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 12
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
- 239000000956 alloy Substances 0.000 description 3
- 229910000734 martensite Inorganic materials 0.000 description 3
- 229920006395 saturated elastomer Polymers 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 150000001805 chlorine compounds Chemical class 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052720 vanadium Inorganic materials 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910000531 Co alloy Inorganic materials 0.000 description 1
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
本発明は酸性油井用マルテンサイト系ステンレス鋼に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to martensitic stainless steel for acid oil wells.
最近になって、石油資源の枯渇化に伴ない従未見捻られ
ていた高深度油井、または、酸性油井が見直されるよう
になってきた。そして、これらの油井は大量の塩化物や
ＣＯ２、及び、Ｈ２Ｓを含む場合が多く、腐蝕性が着し
く激しいので油井管用材料として従来の炭素鋼や低合金
鋼では使用に耐えず、耐蝕性の優れた高合金材料が望ま
れている。Recently, with the depletion of petroleum resources, deep oil wells or acid oil wells, which had previously been neglected, have been reconsidered. These oil wells often contain large amounts of chloride, CO2, and H2S, and are highly corrosive. Conventional carbon steel and low-alloy steel cannot withstand use as materials for oil country tubular goods; Superior high alloy materials are desired.
これらの高合金材料としては、１３Ｃｒ系のマルテンサ
イト・ステンレス鋼、オーステナイトとフェライトの２
相ステンレス鋼、オーステナイト系の烏ニッケル合金、
ニッケル基合金、コバルト基合金、チタン合金等がある
が、そのうちで、５ＵＳ４１０乃至ＳＵＳ ４２０の１
３Ｃｒ系のマルテンサイト・ステンレス鋼はＣＯ２に対
する耐蝕性に優れていることから現状最も広く使用され
ており、かつ、安価である。These high alloy materials include 13Cr-based martensitic stainless steel, austenite and ferrite.
stainless steel, austenitic nickel alloy,
There are nickel-based alloys, cobalt-based alloys, titanium alloys, etc. Among them, 1 of 5US410 to SUS420
3Cr-based martensitic stainless steel is currently the most widely used and inexpensive because it has excellent corrosion resistance against CO2.
しかし、このマルテンサイト系ステンレス鋼の最大の問
題点は、Ｈ２Ｓが共存する場合に硫化物応力腐蝕割れ（
ＳＳＣＣ）を生じることと、塩化物と００２の共存下で
孔蝕や隙間腐蝕を生じることであって、これらの腐蝕に
強いマルテンサイト系ステンレス鋼が特に望まれている
。However, the biggest problem with this martensitic stainless steel is sulfide stress corrosion cracking (
SSCC) and pitting corrosion and crevice corrosion occur in the coexistence of chlorides and 002, and martensitic stainless steels that are resistant to these corrosions are particularly desired.
しかして、上記したマルテンサイト系ステンレス鋼を酸
性油井の油井管用材料として使用する際に要求される特
性の中で最も重要なものとしては次の３つの条件がある
。Therefore, the following three conditions are the most important among the characteristics required when the martensitic stainless steel described above is used as a material for oil country tubular goods in acidic oil wells.
（１）−Ｃｌ−Ｃｏ２−Ｈ２Ｓ環境下において応力腐蝕
割れを起さないこと。(1) Stress corrosion cracking should not occur in a -Cl-Co2-H2S environment.
（２）ＣＩ”−Ｃｏ２−１（２Ｓ環境下における隙間腐
蝕や孔蝕などの局部腐蝕に強いこと。(2) CI''-Co2-1 (resistant to localized corrosion such as crevice corrosion and pitting corrosion in a 2S environment).
（３）高い機械的強度を有すること。(3) Have high mechanical strength.
この３条件のうちで、（３）の機械的性質については熱
処理によって２調整することができるので、この調整の
ための熱処理条件下においての、（１）、及び、（２）
の性能が確保することができるがどうがが重要なことで
ある。Among these three conditions, the mechanical properties (3) can be adjusted by heat treatment, so (1) and (2) under the heat treatment conditions for this adjustment.
What is important is how the performance can be ensured.
本発明者は従来にｉけるマルテンサイト系ステンレス鋼
の硫化物応力腐蝕割れや塩化物とＣＯ２共存下の孔蝕、
隙間腐蝕の問題、及び、酸性油井用の管材として特に要
求される上記した３つの条件について種々実験、研究を
行なった。The present inventor has previously discovered that martensitic stainless steel suffers from sulfide stress corrosion cracking and pitting corrosion in the coexistence of chlorides and CO2.
Various experiments and research were conducted regarding the problem of crevice corrosion and the above three conditions that are particularly required for pipe materials for acidic oil wells.
即ち、０．２Ｃ１３Ｃｒ鋼を基に種々の合金元素ヲ変工
たマルテンサイト系鋼について、９８２℃からの焼入れ
、６７７℃での焼戻しの熱処理を行なった後、常温の５
％Ｃｌ−０，１ａｔｍＣＯ２−０，０５％Ｈ２Ｓ水溶液
中に浸漬した場合の割れ状況を下に示す各材料の耐力、
及び、硬度との関係を調査した結果を第１図に示す。That is, martensitic steel, which is based on 0.2C13Cr steel and modified with various alloying elements, is heat treated at 982°C and tempered at 677°C.
%Cl-0,1atmCO2-0,05%H2S The yield strength of each material is shown below when immersed in an aqueous solution of H2S.
FIG. 1 shows the results of investigating the relationship between hardness and hardness.
使用した材料は次の通りである。The materials used are as follows.
Ｎｏ、１： ０，２Ｃ１３Ｃｒ、 Ｎｏ、２： ０．１
Ｃ１３Ｃｒ、 Ｎｏ、３： ０．３Ｃ−１３Ｃｒ、 Ｎ
ｏ、４： ０．０６Ｃ−１３Ｃｒ、Ｎｏ、５： ０．２
Ｃ１３Ｃｒ ＩＭｏ、 Ｎｏ、６： ０．２Ｃｌ３Ｃ
ｒ ３Ｎｏ、Ｎｏ、７：０．２Ｃ−１３Ｃｒ ０．
ＩＮ、 Ｎｏ、８： ０．２Ｃ−１３Ｃｒ−０，２Ｎ、
Ｎｏ、９： ０．２Ｃ１３Ｃｒ ２Ｃｕ、 Ｎｏ１Ｏ
： ０，２Ｃ−１３Ｃｒ −０、ＩＮｉ％Ｎｏ、１１：
０．２Ｃ−１３Ｃｒ−０，１Ｓ、 Ｎｏ、１２： ０
．２Ｃ１３Ｃｒ−ＩＮｏ−ＩＣｕ％Ｎｏ、１３： ０，
２Ｃ−１３Ｃｒ−３Ｎｏ −ＩＣｕ −２，５Ｎｉ。No, 1: 0.2C13Cr, No, 2: 0.1
C13Cr, No, 3: 0.3C-13Cr, N
o, 4: 0.06C-13Cr, No, 5: 0.2
C13Cr IMo, No, 6: 0.2Cl3C
r 3No, No, 7:0.2C-13Cr 0.
IN, No. 8: 0.2C-13Cr-0,2N,
No, 9: 0.2C13Cr 2Cu, No1O
: 0,2C-13Cr-0, INi%No, 11:
0.2C-13Cr-0,1S, No, 12: 0
．． 2C13Cr-INo-ICu%No, 13: 0,
2C-13Cr-3No-ICu-2,5Ni.
また、この第１図の０内の数字は同時に浸漬した隙間付
平板試験片の重量減少量を示し、さらに、この溶液中で
の全面腐蝕速度は極めて小さいのでこれらの数字は隙間
腐蝕や孔蝕などの局部−蝕に基づくものである。なお、
第１図において、○は耐硫化物応力腐蝕割れに優れるも
のを、また、・は耐硫化物応力腐蝕割れに劣るものを示
し、０内の数値は隙間腐蝕量をμ＠／ｙｅａｒで示した
ものである。In addition, the numbers within 0 in Figure 1 indicate the amount of weight loss of the flat plate specimen with gaps that was immersed at the same time, and since the overall corrosion rate in this solution is extremely small, these numbers do not reflect the effects of crevice corrosion or pitting corrosion. It is based on local eclipse such as. In addition,
In Figure 1, ○ indicates excellent resistance to sulfide stress corrosion cracking, . indicates poor resistance to sulfide stress corrosion cracking, and numbers within 0 indicate the amount of crevice corrosion in μ@/year. It is something.
この第１図から材料の硬度、即ち、強度が上ると硫化物
応力腐蝕割れ感受性が高くなることは明らかであるが、
ＣｕやＭｏを含有するものは強度が高くなっても硫化物
応力腐蝕割れ感受性の低いことも明らかであり、さらに
、ＣｕとＭｏの含有は隙間腐蝕の軽減に有効であり、こ
のＣｕとＭｏの共存が特に顕著な効果を示していること
がわかったのである。It is clear from Fig. 1 that as the hardness, or strength, of the material increases, the susceptibility to sulfide stress corrosion cracking increases.
It is clear that materials containing Cu and Mo have a low susceptibility to sulfide stress corrosion cracking even if their strength increases.Furthermore, the inclusion of Cu and Mo is effective in reducing crevice corrosion; It was found that coexistence had a particularly remarkable effect.
また、Ｔ ｉ、 Ｎ’ｂ、 Ｖの効果は第１図には示さ
れてはいないが、本発明者の実験の結果、これらの元素
の炭窒化物が腐蝕により発生した水素のトラップサイト
として作用するため硫化物応力腐蝕割れの防止に有効な
ことがわかった。Although the effects of Ti, N'b, and V are not shown in Figure 1, the inventor's experiments have shown that carbonitrides of these elements act as trap sites for hydrogen generated by corrosion. It was found to be effective in preventing sulfide stress corrosion cracking.
本発明は上記に説明したように、本発明者の新たな知見
に基いてなされたもので、酸性油井用の材料として極め
て優れている酸性油井用マルテンサイト系ステンレス鋼
を提供するものである。As explained above, the present invention was made based on the new findings of the present inventor, and provides a martensitic stainless steel for acidic oil wells that is extremely excellent as a material for acidic oil wells.
本発明に係る酸性油井用マルテンサイト系ステンレス鋼
は、（１） ＣＯ，１６〜０．２５％、Ｓ ｉ ＜ １
．０％、Ｍｎ＜１．０％、Ｃｒ １２．５−１３．５％
、Ｎｉ ００３−３％、Ｍｏ０１５−３．５％、Ｃｕ０
．５−２％を含み、残部Ｆｅ及び不可避不純物からなる
ことを特徴とする酸性油井用マルテンサイト系ステンレ
ス鋼を第１の発明とし、（２） ＣＯ，１６〜０．２５
％、Ｓｉ＜１．０％、Ｍｎ＜１．０％、Ｃｒ １２．５
−１３．５％、Ｎｉ ００３−３％、Ｍｏ Ｏ，５−３
，５％、Ｃｕ０．５−２％を含み、さらに、Ｔｉ、Ｎｂ
、Ｖの内から選んだ１種、または、２種以上を合計で０
．１〜０．５％含有し、残部Ｆｅ及び不可避不純物から
なることを特徴とする酸性油井用マルテンサイト系ステ
ンレス鋼を第２の発明とする２つの発明よりなるもので
ある。The martensitic stainless steel for acidic oil wells according to the present invention has (1) CO, 16 to 0.25%, S i < 1
．． 0%, Mn<1.0%, Cr 12.5-13.5%
, Ni003-3%, Mo015-3.5%, Cu0
．． The first invention is a martensitic stainless steel for acidic oil wells, characterized in that it contains 5-2% of CO, and the balance consists of Fe and unavoidable impurities, (2) CO, 16-0.25
%, Si<1.0%, Mn<1.0%, Cr 12.5
-13.5%, Ni003-3%, MoO,5-3
, 5%, Cu0.5-2%, and further contains Ti, Nb
, one type selected from V, or two or more types in total 0
．． The second invention is a martensitic stainless steel for acidic oil wells, which contains 1 to 0.5% of Fe and the remainder consists of Fe and unavoidable impurities.
本発明に係る酸性油井用マルテンサイト系ステンレス鋼
について詳細に説明する。The martensitic stainless steel for acidic oil wells according to the present invention will be described in detail.
先づ、本発明に係る酸性油井用マルテンサイト系ステン
レス鋼の含有成分、及び、成分割合について説明する。First, the components and component ratios of the martensitic stainless steel for acid oil wells according to the present invention will be explained.
Ｃは強度を付与する元素であり、特に高深度油井用の管
材料としての必要な強度を得るには、含有量は０．１６
％未満では全く問題とならないものであり、また、０．
２５％を越えて含有されると耐硫化物応力腐蝕割れが著
しく劣化する。よって、Ｃ含有量は０．１６〜０．２５
％とする。C is an element that imparts strength, and in order to obtain the strength necessary for pipe material for deep oil wells, the content should be 0.16
%, there is no problem at all, and 0.
If the content exceeds 25%, the resistance to sulfide stress corrosion cracking will deteriorate significantly. Therefore, the C content is 0.16 to 0.25
%.
Ｓｉ、Ｍｎは製鋼上脱酸剤として使用したものが含有さ
れるものであり、１％を越える含有は加工性や靭性な損
なうようになる。よって、Ｓｉ、Ｍｎの含有量は１％以
下とする。Si and Mn are those used as deoxidizing agents in steel manufacturing, and if the content exceeds 1%, workability and toughness will be impaired. Therefore, the content of Si and Mn is set to 1% or less.
Ｃｒはステンレス鋼としてＣＯ２に対する耐蝕性を付与
する元素であり、含′有量が１２．５％未満では充分な
ＣＯ２耐蝕性を付与できず、また、含有量が１３．５％
を越えるとこの効果は飽和し、が□
つ、マルテンサイト１維を維持して充分な強度を得るた
めにはＮｉ含有量との関係で１３．５％を越えてはなら
ない。よって、Ｃｒ含有量は１２．５〜１３．５％とす
る、なお、Ｃｒはオーステナイト組織を安定にし、さら
に、Ｍｏの含有による強度−上昇を柔らげる効果をも有
する。Cr is an element that imparts corrosion resistance to CO2 in stainless steel, and if the content is less than 12.5%, sufficient CO2 corrosion resistance cannot be imparted, and if the content is less than 13.5%.
However, in order to maintain one martensite fiber and obtain sufficient strength, the Ni content must not exceed 13.5%. Therefore, the Cr content is set to 12.5 to 13.5%. Cr stabilizes the austenite structure and also has the effect of softening the increase in strength due to Mo content.
ＮｉはＭｏ含有量が増加するとフェライト生成傾向が増
し強度が低下するので少量含有させてオーステナイ）Ｍ
織を安定にする元素であるが、含有量が０．３％未満で
はこの効果はなく、また、多量に含有させても効果は飽
和するばかりか、高価であるので３％を越えて含有させ
る必要はない。よって、Ｎｉ含有量は０．３〜３％とす
る。When the Mo content increases, the tendency of Ni to form ferrite increases and the strength decreases.
It is an element that stabilizes weaving, but if the content is less than 0.3%, it will not have this effect, and even if it is contained in a large amount, the effect will not only be saturated, but it is also expensive, so it should be contained in amounts exceeding 3%. There's no need. Therefore, the Ni content is set to 0.3 to 3%.
ＭｏはＣ１−ＣＯ２−Ｈ２Ｓ環境下における耐割れ性、
及び、耐隙間腐蝕性を向上させる元素であり、含有量が
０．５％未満ではこの効果は少なく、また、３．５％を
越えて含有させると上記効果は飽和してしまい、さらに
、マルテンサイト組織を維持するのが極めて困難となる
。よって、Ｍｏ含有量は０．５〜３．５％とする。Mo has cracking resistance in C1-CO2-H2S environment,
It is an element that improves crevice corrosion resistance, and if the content is less than 0.5%, this effect will be small, and if the content exceeds 3.5%, the above effect will be saturated. Maintaining site organization becomes extremely difficult. Therefore, the Mo content is set to 0.5 to 3.5%.
Ｃ，ｕはｃ ＋−ｃ ｏ ２’＋ Ｈ２Ｓ環境下での耐
割れ性、及び、耐隙間腐蝕性の向上に効果のある元素で
あり、Ｍｏとの共存において特に顕著な効果を発揮する
が、含有量が０．５％未満ではこの効果は充分でなく、
また、２％を越えて含有されると効果が飽和し、がっ、
熱間加工性を限外する。よって、Ｃｕ含有量は０．５〜
２．０％とする。C and u are elements that are effective in improving cracking resistance and crevice corrosion resistance in a c + -c o 2'+ H2S environment, and exhibit a particularly remarkable effect when coexisting with Mo. , this effect is not sufficient if the content is less than 0.5%,
In addition, if the content exceeds 2%, the effect will be saturated, and
Limits hot workability. Therefore, the Cu content is 0.5~
It shall be 2.0%.
Ｔｉ、Ｎｂ、■は何れも強力な炭化物生成元素であり、
これらの微細な析出物は腐蝕によって発生した水素のト
ラップサイトとなり、耐硫化物応力腐蝕割れ性の向上に
有効であり、強度の上昇にも効果があるが、含有量が０
．１％木満ではこの効果は期待できず、また、０．５％
を越えて含有させると加工性が劣化する。よって、Ｔｉ
、Ｎｂ、Ｖの内から選んだ１種、または、２種以上の合
計で０．１〜０．５％とする。Ti, Nb, ■ are all strong carbide-forming elements,
These fine precipitates act as trap sites for hydrogen generated by corrosion, and are effective in improving resistance to sulfide stress corrosion cracking and increasing strength.
．． This effect cannot be expected with 1% Kimitsu, and 0.5%
If it is contained in excess of this amount, processability will deteriorate. Therefore, Ti
, Nb, and V, or the total amount of two or more of them is 0.1 to 0.5%.
次に本発明に係る酸性油井用マルテンサイト系ステンレ
ス鋼の実施例を比較例とともに説明する。Next, examples of martensitic stainless steel for acid oil wells according to the present invention will be described together with comparative examples.
実施例
第１表に示す含有成分、成分割合となるように、通常の
溶製法により各種鋼を溶製し、後鋳造してから加工して
試験片を作成した。Examples Various types of steel were melted using a normal melting method so as to have the components and ratios shown in Table 1, and were then cast and processed to prepare test pieces.
第２表に試験結束を示す。Table 2 shows the test ties.
引張特性は９８２℃からの焼入れ、６７７℃での焼戻し
の熱処理を施した試料について測定したものであり、ま
た、腐蝕試験は常温の５％Ｃ１−−０，１ａｔＩＩＣＯ
２−０，０５Ｈ２Ｓ水溶液中に２週間浸漬することによ
り行なった。この場合、応力腐蝕割れ試験にはＵ曲げ試
験片を、また、隙間腐蝕試験には平板試験片にテフロン
ワッシャーにて隙間を付与したものを用いた。The tensile properties were measured on samples that had been heat-treated by quenching from 982°C and tempering at 677°C, and the corrosion test was performed using 5% C1--0,1atIICO at room temperature.
The test was carried out by immersion in a 2-0,05H2S aqueous solution for two weeks. In this case, a U-bend test piece was used for the stress corrosion cracking test, and a flat plate test piece with a gap provided with a Teflon washer was used for the gap corrosion test.
この第２表から明らかなように、本発明に係る酸性油井
用マルテンサイト系ステンレス鋼は比較鋼に比して、耐
ツバ抗張力は格段に優れており、さらに、耐応力腐蝕割
れ、及び、耐隙間腐蝕も極めて優秀であることを示して
いる。As is clear from Table 2, the martensitic stainless steel for acidic oil wells according to the present invention has significantly superior flanges tensile strength and stress corrosion cracking and stress resistance compared to comparative steels. It also shows that crevice corrosion is extremely good.
第１図は耐力と硬度との関係を示し、かつ、耐硫化物応
力腐蝕割れを示したグラフである。FIG. 1 is a graph showing the relationship between yield strength and hardness, and also showing resistance to sulfide stress corrosion cracking.
Claims (2)
ｎ＜１．０％、Ｃｒ １２．５−１３．５％、Ｎｉ Ｏ
，３−３％、Ｍｏ ０．５−３．５％、Ｃｕ０，５〜２
％を含み、残部Ｆｅ及び不可避不純物からなることを特
徴とする酸性油井用マルテンサイト系ステンレス鋼。(1) CO, 16-0, 25%, Si<1.0%, M
n<1.0%, Cr 12.5-13.5%, NiO
,3-3%, Mo 0.5-3.5%, Cu0.5-2
%, with the balance consisting of Fe and unavoidable impurities.
ｎ＜１．０％、Ｃｒ １２．５−１３．５ ％、 Ｎ
ｉ Ｏ，３−３％、 Ｍｏ Ｏ，５−３，５％、Ｃ
ｕ Ｏ，５−２％を含み、さらに、Ｔｉ、Ｎｂ、■の内
から選んだ１種、または、２種以上を合計で０．１〜０
．５％含有し、残部Ｆｅ及び不可避不純物からなること
を特徴とする酸性油井用マルテンサイト系ステンレス鋼
。(2) CO, 16-0, 25%, Si<1.0%, M
n<1.0%, Cr 12.5-13.5%, N
i O, 3-3%, Mo O, 5-3, 5%, C
u Contains O, 5-2%, and further contains one or more selected from Ti, Nb, ■, with a total of 0.1-0
．． A martensitic stainless steel for use in acidic oil wells, characterized in that it contains 5% Fe and the remainder consists of Fe and unavoidable impurities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8202582A JPS58199850A (en) | 1982-05-15 | 1982-05-15 | Martensitic stainless steel for acidic oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8202582A JPS58199850A (en) | 1982-05-15 | 1982-05-15 | Martensitic stainless steel for acidic oil well |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58199850A true JPS58199850A (en) | 1983-11-21 |
Family
ID=13762982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8202582A Pending JPS58199850A (en) | 1982-05-15 | 1982-05-15 | Martensitic stainless steel for acidic oil well |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58199850A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6468550A (en) * | 1987-09-07 | 1989-03-14 | Tomotake Nakahira | Double solenoid needle selector in knitting machine |
| US5167731A (en) * | 1990-07-30 | 1992-12-01 | Nkk Corporation | Martensitic stainless steel for an oil well |
| US5496421A (en) * | 1993-10-22 | 1996-03-05 | Nkk Corporation | High-strength martensitic stainless steel and method for making the same |
| US9677160B2 (en) | 2011-03-03 | 2017-06-13 | Nkk Tubes | Low C-high Cr 862 MPa-class steel tube having excellent corrosion resistance and a manufacturing method thereof |
| JP2018524473A (en) * | 2015-07-16 | 2018-08-30 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | New martensitic stainless steel |
| CN111424221A (en) * | 2020-03-27 | 2020-07-17 | 嘉兴吉森科技有限公司 | Stainless steel plate for lamination and manufacturing method thereof |
-
1982
- 1982-05-15 JP JP8202582A patent/JPS58199850A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6468550A (en) * | 1987-09-07 | 1989-03-14 | Tomotake Nakahira | Double solenoid needle selector in knitting machine |
| US5167731A (en) * | 1990-07-30 | 1992-12-01 | Nkk Corporation | Martensitic stainless steel for an oil well |
| US5496421A (en) * | 1993-10-22 | 1996-03-05 | Nkk Corporation | High-strength martensitic stainless steel and method for making the same |
| US9677160B2 (en) | 2011-03-03 | 2017-06-13 | Nkk Tubes | Low C-high Cr 862 MPa-class steel tube having excellent corrosion resistance and a manufacturing method thereof |
| JP2018524473A (en) * | 2015-07-16 | 2018-08-30 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | New martensitic stainless steel |
| JP2018527458A (en) * | 2015-07-16 | 2018-09-20 | サンドビック インテレクチュアル プロパティー アクティエボラーグ | Drill component |
| US10941469B2 (en) | 2015-07-16 | 2021-03-09 | Ab Sandvik Materials Technology | Martensitic stainless steel |
| US11047028B2 (en) | 2015-07-16 | 2021-06-29 | Sandvik Intellectual Property Ab | Drill component |
| CN111424221A (en) * | 2020-03-27 | 2020-07-17 | 嘉兴吉森科技有限公司 | Stainless steel plate for lamination and manufacturing method thereof |
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