CN1057679A - Steel for sucker rod and processing method - Google Patents
Steel for sucker rod and processing method Download PDFInfo
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- CN1057679A CN1057679A CN 90104471 CN90104471A CN1057679A CN 1057679 A CN1057679 A CN 1057679A CN 90104471 CN90104471 CN 90104471 CN 90104471 A CN90104471 A CN 90104471A CN 1057679 A CN1057679 A CN 1057679A
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- steel
- sucker rod
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- molten steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 57
- 239000010959 steel Substances 0.000 title claims abstract description 57
- 241000252254 Catostomidae Species 0.000 title claims abstract description 17
- 238000003672 processing method Methods 0.000 title description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000004615 ingredient Substances 0.000 claims abstract description 5
- 229910052786 argon Inorganic materials 0.000 claims abstract description 4
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 4
- 238000005496 tempering Methods 0.000 claims abstract description 4
- 229910000640 Fe alloy Inorganic materials 0.000 claims abstract description 3
- 230000000171 quenching Effects 0.000 claims abstract description 3
- 238000010079 rubber tapping Methods 0.000 claims abstract description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 238000010791 quenching Methods 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 235000019628 coolness Nutrition 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000005086 pumping Methods 0.000 description 15
- 238000001816 cooling Methods 0.000 description 3
- 238000005242 forging Methods 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910001046 4142 steel Inorganic materials 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- -1 carbon manganese Chemical compound 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002349 favourable Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000010583 slow cooling Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
A kind of sucker rod 40Mn
2Nb steel, its chemical ingredients are (weight percent) C:0.36～0.44%, Si:0.31～0.40%, Mn:1.2～1.8%, Nb:0.02～0.05%, S≤0.030%, P≤0.030%.This steel tapping temperature is controlled at 1640～1660 ℃, and molten steel is poured into when containing cylinder of steel 1/3, and in time adding granularity is the Nb-Fe alloy of 30～70mm, jar argon bottom-blowing 8～10 minutes.This steel finished product will carry out 820～850 ℃ of quenchings and 520～620 ℃ of tempering heat treatment.This steel reaches GB7229-87D level bar standard and U.S. API-11B standard D level bar standard, and it is simple to have technology, and performance is good, low cost and other advantages.
Description
The invention belongs to important structure part-D grade pumping rod chemical composition design of steel and the smelting and the heat treating method of this steel of oil field oil production machine.
Existing both at home and abroad sucker rod product is divided into three kinds on C level bar, D level bar, K level bar by strength property.Along with oil recovery industrial boom and many oil fields constantly are in the later stage exploitation, producing horizon reduces gradually with oil well and deepens, and requires sucker rod not only to have enough intensity, but also high toughness and fatigue performance will be arranged.Adopt at present both at home and abroad extensively and what promote is D grade pumping rod product and a spot of K grade pumping rod product, C level bar does not adopt because of comprehensive mechanical property is low.The typing grade of steel that domestic in recent years manufacturing D grade pumping rod product adopts has 35Mn
2, 35CrMo, 42CrMo.Make K grade pumping rod product approval grade of steel the 20CrMo steel is arranged.The D grade pumping rod that API is recommended has with the grade of steel of steel: 1536 and the 4142(notes: 1536 steel are equivalent to China 35Mn
2Steel; 4142 steel are equivalent to the 42CrMo steel of China).Japan's special permission communique, clear 59-23850 openly is used for the D grade pumping rod product of oil well, wherein the chemical ingredients of this product (weight percent) C:0.34～0.44%, Mn:1.35～1.65%, P:0.04%, S:0.05%, Si:0.15～0.30%, V:0.07～0.15%.
Reflect according to the user; The D grade pumping rod that present China is adopted remains in weak point as follows with steel: (1) fatigue performance index is undesirable.(2) impact, unit elongation, relative reduction in area index are undesirable.(3) because high-temp plastic is relatively poor, under big forging ratio situation, edges and corners, sucker rod end easily crack defective and scrap the D grade pumping rod that is adopted with steel, therefore, and high temperature forging yield rate lower (yield rate is 92～97%).In order to remedy existing these deficiencies of steel grade, for this steel of the steel for sucker rod that satisfies customer requirements, the spy develops 40Mn
2The Nb steel for sucker rod.
40Mn of the present invention
2The chemical ingredients of Nb steel is (weight percent) C:0.36～0.44%, Si:0.31～0.40%, Mn:1.2～1.8%, Nb:0.02～0.05%, S≤0.030%, P≤0.030%.This steel is when smelting, and the molten steel tapping temperature is higher 20～30 ℃ than general medium carbon manganese steel, promptly should be controlled at 1640～1660 ℃.After reaching this temperature, molten steel is contained in the cylinder of steel by pouring in the stove, when the molten steel amount in pouring jar into reached 1/3, in time adding granularity was the Nb-Fe alloy of 30～70mm.After molten steel is filled jar, in time hang and annotate ingot platform place, adopt the blowing argon gas novel process for refining, the argon bottom-blowing time is 8～10 minutes, pour into a mould steel ingot then, after the calm demoulding, deliver to the rough rolling mill and roll into 90 * 90mm square billet, after greater than slow cooling in 8 hours, roll into φ 19mm or φ 22mm or φ 25mm small round steel product by customer requirements.Adopt the little spraying fast cooling method of cold water when hot rolled circular steel enters cooling table, favourable this rigidity can improve.Condition of delivery is a hot rolling dress attitude.Require length scaling: L=8500mm, △ L=+50～60mm.The sucker rod product that adopts this steel to make is heat-treated system: quenching temperature is 820～850 ℃, and insulation is 40～50 minutes between being, carries out shrend then.Tempering temperature is 520～620 ℃, and soaking time is 60～70 minutes, then air cooling.
The present invention adopt this chemical ingredients through smelt, after the rolling and thermal treatment, the comprehensive mechanical property of this steel does not tightly satisfy customer requirements and reaches GB7229-87D grade pumping rod national standard, has also reached the international most advanced level of the D grade pumping rod of U.S. API-11B code requirement simultaneously.Its comprehensive mechanical property comparable situation sees table 1 and table 2 for details.
This steel is not only the high-quality steel of making the D grade pumping rod, but also is the high-quality steel of making all moving loads such as axle, bent axle, automobile axle shaft, worm screw, pull bar, connecting rod, bolt, screw, spring or variable load parts and structural part.In addition, adopt this steel to make sucker rod and other product and compare, also have cheap aspects such as advantage with adopting the Cr-Mo Series Steel.
40Mn
2The Nb steel for sucker rod was once on probation in units such as Ministry of Geology Zhangjiakou Prospecting Mineral Machinery Plant.The mechanical property of wherein opening the trial and error test check the results are shown in Table 3.
Its every index all meets or exceeds the agreement set quota and reaches the international most advanced level that requires the D grade pumping rod in GB7229-87D level bar national standard and the U.S. API-11B standard.
In addition,, forge the sucker rod yield rate, forge yield rate than other steel for sucker rod and improve more than 2% up to 99% because this steel high temperature forging plasticity is good.Be that sucker rod manufactory reduces 1200 in waste product (saving 300,000 tons of steel), be 120,000 yuan of direct economic benefits that the user created.
Table 2 fatigue property
Annotate: (1) other pumping rod is taken passages high fatigue property steel data (containing D grade pumping rod steel in the U.S. steel API-11B standard)
(2) notch fatigue sample theoretical stress concentration factor K
1=2
(3) 40Mn in the table 2
2The fatigue property value of Nb steel does not have enough time to detect the highest safe range of stress value as yet.
Table 3 mechanical property
Claims (3)
1, a kind of sucker rod 40Mn
2Nb steel, its chemical ingredients are (weight percent) C:0.36～0.44%, Mn:1.2～1.8%, S≤0.030%, P≤0.030%.It is characterized in that it also contains Si:0.31～0.40%, Nb:0.02～0.05%.
2, the described 40Mn of claim 1
2The Nb steel, the molten steel tapping temperature that it is characterized in that it should be controlled at 1640～1660 ℃, pours into when molten steel and contains cylinder of steel 1/3, and should in time add granularity is the Nb-Fe alloy of 30～70mm, molten steel fill contain cylinder of steel after, be to annotate ingot after 8～10 minutes by the jar argon bottom-blowing time.
3, a kind of sucker rod 40Mn
2The Nb steel is characterized in that will heat-treating after making the finished product sucker rod, and its quenching temperature is 820～850 ℃, soaking time is shrend then in 40～50 minutes, carry out temper again, tempering temperature is 520～620 ℃, and tempering insulation time is 60～70 minutes air coolings then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90104471 CN1057679A (en) | 1990-06-16 | 1990-06-16 | Steel for sucker rod and processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90104471 CN1057679A (en) | 1990-06-16 | 1990-06-16 | Steel for sucker rod and processing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1057679A true CN1057679A (en) | 1992-01-08 |
Family
ID=4878578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90104471 Pending CN1057679A (en) | 1990-06-16 | 1990-06-16 | Steel for sucker rod and processing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1057679A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328249A (en) * | 2014-11-26 | 2015-02-04 | 重庆理工大学 | Heat treatment method of automotive full-hollow semi-axle |
| CN106498131A (en) * | 2016-11-24 | 2017-03-15 | 遵义金业机械铸造有限公司 | A kind of heat treatment method of high intensity ZG40Mn2 material |
-
1990
- 1990-06-16 CN CN 90104471 patent/CN1057679A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104328249A (en) * | 2014-11-26 | 2015-02-04 | 重庆理工大学 | Heat treatment method of automotive full-hollow semi-axle |
| CN106498131A (en) * | 2016-11-24 | 2017-03-15 | 遵义金业机械铸造有限公司 | A kind of heat treatment method of high intensity ZG40Mn2 material |
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