CN102534604A - Method for prolonging service life of piercing plug for seamless steel tubes - Google Patents
Method for prolonging service life of piercing plug for seamless steel tubes Download PDFInfo
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- CN102534604A CN102534604A CN2012100284004A CN201210028400A CN102534604A CN 102534604 A CN102534604 A CN 102534604A CN 2012100284004 A CN2012100284004 A CN 2012100284004A CN 201210028400 A CN201210028400 A CN 201210028400A CN 102534604 A CN102534604 A CN 102534604A
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- chromium carbide
- perforating head
- steel tube
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- electrode
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Abstract
The invention relates to the technical field of seamless steel tube production, in particular to a method for prolonging the service life of a piercing plug for seamless steel tubes. Applying a high-energy micro-arc alloying into the technique for preparing coating on the surface of the piercing plug, the method comprises: firstly, preparing a metal yttrium modified chrome carbide electrode by a hot pressing sintering process; secondly, depositing a chrome carbide coating on the piercing plug by using high-energy micro-arc alloying equipment, controlling the argon flow and the output voltage, frequency, power and deposition time of the equipment in a coating preparation process, and thus, preparing the high-performance coating on the surface of the piercing plug and prolonging the service life of the piercing plug.
Description
Technical field
The present invention relates to the seamless steel tube production technical field; Refer in particular to a kind of weldless steel tube perforating head method in work-ing life that improves; Adopt the CrC coating of the means of high energy differential of the arc alloying in perforating head surface preparation Rare Earth Y property commonly used; Thereby use the top to improve more than 55% work-ing life, and effectively practiced thrift cost.
Background technology
Perforating head is one of key tool of consumption maximum in the seamless steel tube production, and the height in its work-ing life all has direct influence to output, quality, the production cost of tube product, and extremely steel pipe enterprise shows great attention to.Because the top contacts with the high temperature pipe in perforation procedure; Bearing the effect of compound stresses such as huge axial compression stress, radial cut stress and skin friction force; Therefore just collapse inefficacies such as nose, steel bonding, cracking in early days easily; Cause its work-ing life not high, thereby influence the production efficiency of steel pipe enterprise, increase the production cost of enterprise simultaneously.Researchists have carried out systematic study to perforating head in a large number at present, through improving the hot strength and the hardness of top material, improve the antioxidant property on surface, just can effectively prevent to come directly towards collapse nose, steel bonding, cracking, thereby improve the work-ing life of top.Big quantity research shows through the top being carried out surface treatments such as surface coating, boronising, built-up welding; This process for treating surface was not only economical and practical but also can effectively improve top work-ing life; But because the complicacy effect of the excessive layer between coating and the matrix, thereby make this process for treating surface be difficult to apply on a large scale.The present invention is on the basis of summing up big quantity research; A kind of new process of surface treatment is proposed; Means through adopting high energy differential of the arc alloying are in the CrC coating of perforating head surface preparation Rare Earth Y property commonly used, thereby use the top to improve more than 55% work-ing life, and have effectively practiced thrift cost.
Summary of the invention
The present invention provides a kind of a kind of sufacing method at perforating head surface preparation new coating; High energy differential of the arc alloying process is incorporated in the technology of preparing of perforating head top coat; At first adopt hot pressing sintering method to process the chromium carbide electrode of rare earth metal yttrium modification; Under argon shield, adopt high energy differential of the arc alloying equipment on perforating head, to deposit chromium carbide coating then; Control coating prepares argon flow amount and equipment output voltage, frequency, power and the depositing time in the process, thus be implemented in the top surface preparation go out excellent performance to coating, improve the work-ing life of perforating head.
Process method of the present invention mainly comprises following step, and concrete steps are following:
Step 1: the preparation coated electrode: the present invention adopts chromium carbide half sintered body electrode; The preparation method of chromium carbide half sintered body electrode is following: at first select for use the high pure and ultra-fine chromium carbide powder to make raw material; With NiCr and Mo mutually as matrix metal; And add nano level Y and make additive, each component is following by mass percentage:
High pure and ultra-fine chromium carbide powder 72% ~ 75%;
The mixture 24% ~ 27% of NiCr and Mo, wherein Mo accounts for 0.5% ~ 1% of mixture quality;
Nano level Y
2O
30.5% ~ 2%.
Compound is through wet ball-milling, vacuum-drying, N
2Sieve in the air-flow, after 5MPa high pressure pressed is shaped, is air-dry, obtain at 1300 ℃ of sintering temperatures, insulation 10h.
Step 2: the preparation of perforating head top coat, adopt high energy differential of the arc alloying equipment deposition chromium carbide coating on weldless steel tube perforating head surface: chromium carbide half sintered body electrode that optional step 1 prepares is as the anodic consumable electrode, conditioning equipment output rating 500-3000W; Voltage 40-150V; Frequency 300-2000Hz, the controlled 10-60ml/s of flow of the protectiveness argon gas of selecting for use during deposition bonds together for preventing coating and matrix; The consumable electrode rotation of spinning; Rotating speed is at 30-400 revolutions per second, and control depositing time 3-10 minute is realized the coat-thickness of the surface preparation in the top is reached 10-30um.
In the said step 1, chromium carbide powder is Cr
3C
2, Cr
7C
3, Cr
23C
6Or by Cr
3C
2, Cr
7C
3And Cr
23C
6Mix by any mass ratio, foreign matter content should be less than 0.01wt% in the chromium carbide powder, and particle diameter is less than 200 nanometers.
The chemical ingredients of NiCr alloy is 79wt%Ni-21wt%Cr in the said step 1.
Nano level Y in the said step 1
2O
3Particle diameter less than 200 nanometers.
In the said step 2; The varying parameter of this equipment is output rating, voltage and frequency; The spin rotating speed of depositing electrode, the flow of shielding gas during deposited coatings can be regulated output rating and magnitude of voltage according to the combination of power shelves; And electrode rotating speed and the shield gas flow rate and the depositing time of phase proportioning with it, finally reach certain thickness coating.
Beneficial effect of the present invention is that perforating head when deposited coatings, does not need oil removal treatment, and after disposing through above-mentioned steps, the perforating head surface can deposit one deck CrC coating, and coat-thickness is at the 10-30 mu m range; Coating is metallurgical binding with the surface, top, and sticking power is greater than 130N, and has higher surface hardness greater than 2500Hv; Prepared chromium carbide coating has good abrasion resistance and antioxidant property; Coating and top surface adhesion force are greater than 130N, and coatingsurface hardness is greater than 2500Hv, and the perforating head for preparing can be realized 1500 in once perforated weldless steel tube; Than improving 55% the work-ing life of original steel pipe; The process of surface treatment of this perforating head does not pollute environment, and technical process is simple, easily control.
Embodiment
Embodiment 1:
1) preparation coated electrode: select for use with NiCr alloy powder and Mo as matrix metal mutually, chromium carbide powder is by 30
%Cr
3C
2, 30
%Cr
7C
3With 40
%Cr
23C
6Form the mixture 25% of NiCr alloy powder and metal M o powder; Wherein metal M o powder accounts for 0.5% of mixture quality; Nanometer Y
2O
31%; Chromium carbide powder 74% mixes each component after wet ball-milling vacuum-drying, N
2Sieve in the air-flow, be shaped in 5MPa high pressure pressed, under 1300 ℃ of temperature, put into sintering, make the chromium carbide electrode behind the insulation 10h, the particle size range of said chromium carbide powder is at 170 ~ 190nm; Said nanometer Y
2O
3Particle size range at 150 ~ 180nm.
2) preparation of perforating head top coat: be chosen in weldless steel tube perforating head 16Cr2Ni4MoW material surface and adopt high energy differential of the arc alloying equipment deposition chromium carbide coating, chromium carbide half sintered body electrode that optional step 1 prepares is as the anodic consumable electrode, conditioning equipment output rating 2000W; Voltage 110V; Frequency 1300Hz, the flow 55ml/s of protectiveness argon gas during deposition, depositing electrode can spin rotational speed at 400 revolutions per seconds; Depositing time 3 minutes; The coat-thickness of top surface preparation is 21um, sticking power 140N, and hardness is 2610Hv; The perforating head for preparing can be realized 1507 in once perforated weldless steel tube, improves more than 55% 967 work-ing lifes than original perforation.
Embodiment 2:
1) preparation coated electrode: select for use with NiCr alloy powder and Mo as matrix metal mutually, chromium carbide powder is Cr
3C
2, the mixture 26% of NiCr alloy powder and metal M o powder; Wherein metal M o powder accounts for 1% of mixture quality; Nanometer Y
2O
32%; Chromium carbide powder 72% mixes each component after wet ball-milling vacuum-drying, N
2Sieve in the air-flow, be shaped in 5MPa high pressure pressed, under 1300 ℃ of temperature, put into sintering, make the chromium carbide electrode behind the insulation 10h, the particle size range of said chromium carbide powder is at 180 ~ 200nm; Said nanometer Y
2O
3Particle size range at 180 ~ 200nm.
2) preparation of perforating head top coat: be chosen in weldless steel tube perforating head 15Cr2Ni3MoW material surface and adopt high energy differential of the arc alloying equipment deposition chromium carbide coating, chromium carbide half sintered body electrode that optional step 1 prepares is as the anodic consumable electrode, conditioning equipment output rating 1500W; Voltage 90V; Frequency 1200Hz, the flow 45ml/s of protectiveness argon gas during deposition, depositing electrode can spin rotational speed at 230 revolutions per seconds; Depositing time 4 minutes; The coat-thickness of top surface preparation is 18um, sticking power 135N, and hardness is 2570Hv; The perforating head for preparing can be realized 1500 in once perforated weldless steel tube, improves more than 55% 967 work-ing lifes than original perforation.
Embodiment 3:
1) preparation coated electrode: select for use with NiCr alloy powder and Mo as matrix metal mutually, chromium carbide powder is Cr
7C
3, the mixture 24.5% of NiCr alloy powder and metal M o powder; Wherein metal M o powder accounts for 1% of mixture quality; Nanometer Y
2O
30.5%; Chromium carbide powder 75% mixes each component after wet ball-milling vacuum-drying, N
2Sieve in the air-flow, be shaped in 5MPa high pressure pressed, under 1300 ℃ of temperature, put into sintering, make the chromium carbide electrode behind the insulation 10h, the particle size range of said chromium carbide powder is at 160 ~ 180nm; Said nanometer Y
2O
3Particle size range at 180 ~ 200nm.
2) preparation of perforating head top coat: be chosen in weldless steel tube perforating head 15Cr2Ni3MoW material surface and adopt high energy differential of the arc alloying equipment deposition chromium carbide coating, chromium carbide half sintered body electrode that optional step 1 prepares is as the anodic consumable electrode, conditioning equipment output rating 500W; Voltage 130V; Frequency 300Hz, the flow 25ml/s of protectiveness argon gas during deposition, depositing electrode can spin rotational speed at 100 revolutions per seconds; Depositing time 8 minutes; The coat-thickness of top surface preparation is 15um, sticking power 136N, and hardness is 2590Hv; The perforating head for preparing can be realized 1501 in once perforated weldless steel tube, improves more than 55% 967 work-ing lifes than original perforation.
Embodiment 4:
1) preparation coated electrode: select for use with NiCr alloy powder and Mo as matrix metal mutually, chromium carbide powder is Cr
23C
6, the mixture 27% of NiCr alloy powder and metal M o powder; Wherein metal M o powder accounts for 0.5% of mixture quality; Nanometer Y
2O
31%; Chromium carbide powder 72% mixes each component after wet ball-milling vacuum-drying, N
2Sieve in the air-flow, be shaped in 5MPa high pressure pressed, under 1300 ℃ of temperature, put into sintering, make the chromium carbide electrode behind the insulation 10h, the particle size range of said chromium carbide powder is at 160 ~ 180nm; Said nanometer Y
2O
3Particle size range at 180 ~ 200nm.
2) preparation of perforating head top coat: be chosen in weldless steel tube perforating head 15Cr2Ni3MoW material surface and adopt high energy differential of the arc alloying equipment deposition chromium carbide coating, chromium carbide half sintered body electrode that optional step 1 prepares is as the anodic consumable electrode, conditioning equipment output rating 1000W; Voltage 40V; Frequency 1800Hz, the flow 15ml/s of protectiveness argon gas during deposition, depositing electrode can spin rotational speed at 50 revolutions per seconds; Depositing time 10 minutes; The coat-thickness of top surface preparation is 25um, sticking power 132N, and hardness is 2600Hv; The perforating head for preparing can be realized 1506 in once perforated weldless steel tube, improves more than 55% 967 work-ing lifes than original perforation.
Embodiment 5:
1) preparation coated electrode: select for use with NiCr alloy powder and Mo as matrix metal mutually, chromium carbide powder is by 10
%Cr
3C
2, 50
%Cr
7C
3With 40
%Cr
23C
6Form the mixture 27% of NiCr alloy powder and metal M o powder; Wherein metal M o powder accounts for 0.5% of mixture quality; Nanometer Y
2O
31%; Chromium carbide powder 72% mixes each component after wet ball-milling vacuum-drying, N
2Sieve in the air-flow, be shaped in 5MPa high pressure pressed, under 1300 ℃ of temperature, put into sintering, make the chromium carbide electrode behind the insulation 10h, the particle size range of said chromium carbide powder is at 160 ~ 180nm; Said nanometer Y
2O
3Particle size range at 180 ~ 200nm.
2) preparation of perforating head top coat: be chosen in weldless steel tube perforating head 15Cr2Ni3MoW material surface and adopt high energy differential of the arc alloying equipment deposition chromium carbide coating, chromium carbide half sintered body electrode that optional step 1 prepares is as the anodic consumable electrode, conditioning equipment output rating 3000W; Voltage 150V; Frequency 2000Hz, the flow 10ml/s of protectiveness argon gas during deposition, depositing electrode can spin rotational speed at 30 revolutions per seconds; Depositing time 3 minutes; The coat-thickness of top surface preparation is 28um, sticking power 138N, and hardness is 2650Hv; The perforating head for preparing can be realized 1510 in once perforated weldless steel tube, improves more than 55% 967 work-ing lifes than original perforation.
Claims (5)
1. one kind is improved the weldless steel tube perforating head method in work-ing life; It is characterized in that: at first adopt hot pressing sintering method to process the chromium carbide electrode of rare earth metal yttrium modification; Under argon shield, adopt high energy differential of the arc alloying equipment then; Argon flow amount and equipment output voltage, frequency, power and depositing time that control coating prepares in the process deposit chromium carbide coating on perforating head, thereby improve the work-ing life of perforating head.
2. a kind of weldless steel tube perforating head method in work-ing life that improves as claimed in claim 1 is characterized in that: comprise the steps:
Step 1: preparation coated electrode: adopt chromium carbide half sintered body electrode; The preparation method of chromium carbide half sintered body electrode is following: at first select for use the high pure and ultra-fine chromium carbide powder to make raw material; With NiCr and Mo mutually as matrix metal; And add nano level Y and make additive, each component is following by mass percentage:
High pure and ultra-fine chromium carbide powder 72% ~ 75%;
The mixture 24% ~ 27% of NiCr and Mo, wherein Mo accounts for 0.5% ~ 1% of mixture quality;
Nano level Y
2O
30.5% ~ 2%;
Compound is through wet ball-milling, vacuum-drying, N
2Sieve in the air-flow, after 5MPa high pressure pressed is shaped, is air-dry, obtain at 1300 ℃ of sintering temperatures, insulation 10h;
Step 2: the preparation of perforating head top coat, adopt high energy differential of the arc alloying equipment deposition chromium carbide coating on weldless steel tube perforating head surface: chromium carbide half sintered body electrode that optional step 1 prepares is as the anodic consumable electrode, conditioning equipment output rating 500-3000W; Voltage 40-150V; Frequency 300-2000Hz, the controlled 10-60ml/s of flow of the protectiveness argon gas of selecting for use during deposition bonds together for preventing coating and matrix; The consumable electrode rotation of spinning; Rotating speed is at 30-400 revolutions per second, and control depositing time 3-10 minute is realized the coat-thickness of the surface preparation in the top is reached 10-30um.
3. a kind of weldless steel tube perforating head method in work-ing life that improves as claimed in claim 2, it is characterized in that: in the said step 1, chromium carbide powder is Cr
3C
2, Cr
7C
3, Cr
23C
6Or by Cr
3C
2, Cr
7C
3And Cr
23C
6Mix by any mass ratio, foreign matter content should be less than 0.01wt% in the chromium carbide powder, and particle diameter is less than 200 nanometers.
4. a kind of weldless steel tube perforating head method in work-ing life that improves as claimed in claim 2, it is characterized in that: the chemical ingredients of NiCr alloy is 79wt%Ni-21wt%Cr in the said step 1.
5. a kind of weldless steel tube perforating head method in work-ing life that improves as claimed in claim 2 is characterized in that: nano level Y in the said step 1
2O
3Particle diameter less than 200 nanometers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210028400.4A CN102534604B (en) | 2012-02-09 | 2012-02-09 | Method for prolonging service life of piercing plug for seamless steel tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210028400.4A CN102534604B (en) | 2012-02-09 | 2012-02-09 | Method for prolonging service life of piercing plug for seamless steel tubes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102534604A true CN102534604A (en) | 2012-07-04 |
| CN102534604B CN102534604B (en) | 2014-04-09 |
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ID=46342595
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|---|---|---|---|
| CN201210028400.4A Active CN102534604B (en) | 2012-02-09 | 2012-02-09 | Method for prolonging service life of piercing plug for seamless steel tubes |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195549A (en) * | 2014-09-15 | 2014-12-10 | 内蒙古第一机械集团有限公司 | Method for reinforcing tooth surface of driving wheel gear ring of crawler vehicle |
| CN105821459A (en) * | 2016-03-29 | 2016-08-03 | 常州大学 | Method for preparing boride coating on stainless steel surface |
| CN106148970A (en) * | 2015-04-16 | 2016-11-23 | 宁波金特信钢铁科技有限公司 | A kind of piercing plug for seamless steel tubes surface infiltration layer technique |
| CN109023355A (en) * | 2018-09-30 | 2018-12-18 | 安徽工业大学 | A kind of iron-based hypereutectic wear-resistant coating of plasma surfacing and preparation method thereof of multiple dimensioned particle enhancing |
| CN110205561A (en) * | 2019-06-20 | 2019-09-06 | 芜湖点金机电科技有限公司 | A kind of reinforcing piercing plug for seamless steel tubes and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195549A (en) * | 2014-09-15 | 2014-12-10 | 内蒙古第一机械集团有限公司 | Method for reinforcing tooth surface of driving wheel gear ring of crawler vehicle |
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| CN105821459A (en) * | 2016-03-29 | 2016-08-03 | 常州大学 | Method for preparing boride coating on stainless steel surface |
| CN105821459B (en) * | 2016-03-29 | 2018-06-26 | 常州大学 | A kind of method for preparing boride coating in stainless steel surface |
| CN109023355A (en) * | 2018-09-30 | 2018-12-18 | 安徽工业大学 | A kind of iron-based hypereutectic wear-resistant coating of plasma surfacing and preparation method thereof of multiple dimensioned particle enhancing |
| CN109023355B (en) * | 2018-09-30 | 2020-05-01 | 安徽工业大学 | Multi-scale particle reinforced plasma surfacing iron-based hypereutectic wear-resistant coating and preparation method thereof |
| CN110205561A (en) * | 2019-06-20 | 2019-09-06 | 芜湖点金机电科技有限公司 | A kind of reinforcing piercing plug for seamless steel tubes and preparation method thereof |
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|---|---|
| CN102534604B (en) | 2014-04-09 |
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