CN103128122B - Seamless steel tube hole forming pin in composite structure and manufacturing method thereof - Google Patents
Seamless steel tube hole forming pin in composite structure and manufacturing method thereof Download PDFInfo
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- CN103128122B CN103128122B CN201310029830.2A CN201310029830A CN103128122B CN 103128122 B CN103128122 B CN 103128122B CN 201310029830 A CN201310029830 A CN 201310029830A CN 103128122 B CN103128122 B CN 103128122B
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Abstract
The invention aims to provide a manufacturing method of a seamless steel tube hole forming pin in a composite structure with the high wear-resisting property. The manufacturing method is capable of solving problems of short living life of a normal hole forming pin and poor quality of a formed hole. Manufacturing technological processes of the seamless steel tube hole forming pin in the composite structure with the high wear-resisting property are as follows: preparing the hole forming pin; mechanically turning a working end; preheating; laser cladding; preserving heat and cooling slowly; and accurate grinding. The manufacturing method of the seamless steel tube hole forming pin in the composite structure with the high wear-resisting property is characterized in that the hole forming pin is manufactured in the composite structure, the manufacturing cost of the seamless steel tube hole forming pin in the composite structure with the high wear-resisting property has little difference with the manufacturing cost of a hole forming pin made of a single material, and the produced alloy coating has good mechanical property. The coating is strong in hardness, high in glossiness and small in rubbing action on a tube wall, so that the quality of the formed hole is improved. The service life of the hole forming pin is greatly prolonged, and the manufacturing method of the seamless steel tube hole forming pin in the composite structure with the high wear-resisting property has good effects of reducing change frequency of the hole forming pin, improving production efficiency, reducing investment of manpower and material resources, saving energy and reducing emission.
Description
Technical field
The invention belongs to pecker manufacture and laser melting and coating technique field, relate to a kind of manufacturing technology of seamless steel pipe pecker of high-wear resistance composite construction specifically.
Background technology
Pecker is one of important mould in seamless steel tube production, and its Main Function carries out perforation processing to steel billet exactly.When producing seamless steel pipe, first pecker is fixed on the upper bolster of extrusion equipment, secondly the steel billet being heated to more than 1100 DEG C is positioned over die shoe, then by extrusion equipment, pressure is applied to upper and lower die holder, thus steel billet extrusion process is gone out endoporus.Therefore pecker operationally, and condition of work is extremely severe, and in whole perforation process, pecker all will be subject to the effect of high temperature, high pressure, severe friction.In addition, because pecker is subject to the high temperature action of blank, pecker own temperature can raise rapidly, after therefore perforation machines, will carry out water-spraying control immediately to pecker surface.Therefore, when pecker works under above-mentioned working condition, surface is very easily worn, scratch and cause pecker to lose efficacy.At present, most of producer all adopts the method for built-up welding to repair the pecker of impaired inefficacy, but the service life of repairing rear pecker does not have too large raising yet.Therefore again Bead weld repair must be carried out to the pecker of impaired inefficacy after a certain period of use time.Therefore this just causes that production efficiency is low, maintenance cost increases, a series of adverse consequences of time consumption and energy consumption.
Laser melting coating utilizes the energy of laser wear-resisting, the corrosion resistant layer of precious metal of cladding or cermet coating on the metal material.Laser cladding layer and base metal surface are metallurgical binding, little to the fusing amount of parent metal.Many workpiece worked in the presence of a harsh environment, can obtain the composite alloy coat with property by laser cladding.Be commonly used for the process for modifying surface of metal material or the recovery technique for inefficacy part.
Summary of the invention
Object of the present invention is just to provide a kind of high life, the seamless steel pipe pecker of perforation matter measured a kind of composite construction and manufacture method thereof.
Technical scheme of the present invention:
A seamless steel pipe pecker for composite construction, is characterized in that: the working end of very easily wearing and tearing at pecker, is namely less than 150mm in distance working end end face length, there is alloy coat at the position of degree of depth 5mm;
A kind of preparation method of seamless steel pipe pecker of composite construction is as follows:
1) produce pecker with hot-work die steel, and carry out mechanical turning to pecker working end, turning is of a size of: length is less than 150mm, the degree of depth is 5mm;
2) with acetone soln, pecker turning position is cleaned, to guarantee to remove matrix surface greasy dirt;
3) with heating tape, pecker turning position is heated to 400 DEG C ~ 550 DEG C, is incubated 6 ~ 12 hours, to guarantee pecker heat penetration;
4) alloyage powder, the mass percentage content of alloy powder is as follows: carbon C 0.7 ~ 1.5%, silicon Si 0.41 ~ 0.82%, iron Fe 2.16 ~ 2.85%, nickel 2.27 ~ 2.5%, chromium Cr29.5 ~ 32.4%, molybdenum Mo 0.12 ~ 0.26%, tungsten W 8.7 ~ 17.8%, all the other are cobalt Co; Powder size is-140 ~+325 orders;
5) laser cladding equipment is adopted to carry out laser melting coating to the position that pecker turning is fallen; In laser cladding process, laser power is 2.5Kw ~ 3.5Kw; Laser scanning speed is 4mm/s ~ 10mm/s; Spot diameter is 4mm ~ 6mm; Focal length is 400mm ~ 500mm; Automatic powder feeding system is synchronous powder feeding system, and powder feeding rate is 5g/min ~ 10g/min; Alloy coat thickness is finally made to reach 5mm ~ 7mm; In laser cladding process, molten bath adopts high purity argon or nitrogen to protect, and gas flow is 4L/min ~ 8L/min;
6) by heat-preservation cotton the alloy coat of pecker wrapped and do slow cooling process, naturally cool to room temperature;
7) the alloy coat grinding machine of pecker is carried out fine grinding process, roughness reaches 1.6 ~ 3.2, and makes alloy coat diameter identical with pecker diameter.
Advantage of the present invention is: the seamless steel pipe pecker of a kind of composite construction of the present invention machined alloy coat in extremely flimsy working end; this alloy coat has following characteristics: be metallurgical binding with pecker matrix; and hardness is large, highly polished, resistance to elevated temperatures is good; the impact of severe friction and high temperature, high pressure in perforation process can be resisted, thus play the effect of protection pecker matrix.Therefore the service life of pecker can greatly be improved.
Adopt composite construction to manufacture pecker, the pecker that manufacturing cost and homogenous material manufacture differs very little, and the alloy coat of preparation has good mechanical property.Because coating hardness is large, highly polished, little to the rubbing action of tube wall, therefore can improve perforation quality.And this pecker significantly improves service life, number of times changed for minimizing pecker, enhances productivity, reduce manpower and materials input, energy-saving and emission-reduction, there is good effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of pecker of the present invention;
Wherein: 1-pecker stiff end; 2-pecker working end; 3-alloy coat.
Detailed description of the invention
Below in conjunction with detailed description of the invention, present invention process is further supplemented and explanation.These embodiments are illustrative and should be interpreted as limiting the present invention.
Embodiment 1
The present embodiment is to manufacture the composite construction pecker that diameter is Φ 735mm, and step is as follows:
1) produce pecker with the steel that the trade mark is H13, and carry out mechanical turning to the working end of pecker, turning is of a size of: length is 120mm, the degree of depth is 5mm;
2) with acetone soln, pecker turning position is cleaned, to guarantee to remove matrix surface greasy dirt;
3) with heating tape, pecker turning position is heated to 450 DEG C, is incubated 12 hours, to guarantee pecker heat penetration;
4) alloyage powder, the mass percentage content of alloy powder is as follows: carbon C 1.2%, silicon Si 0.6%, iron Fe 2.2%, nickel 2.3%, chromium Cr 29.8%, molybdenum Mo 0.23%, tungsten W 9.8%, all the other are cobalt Co; Powder size is-140 ~+325 orders;
5) laser cladding equipment is adopted to carry out laser melting coating to the position that pecker turning is fallen.In laser cladding process, laser power is 3.5Kw; Laser scanning speed is 4mm/s; Spot diameter is 4mm; Focal length is 400mm; Powder feeding rate is 8g/min, finally makes alloy coat thickness reach 5.6mm; In laser cladding process, molten bath adopts high purity argon to protect, and gas flow is 7L/min;
6) by heat-preservation cotton the alloy coat of pecker wrapped and do slow cooling process, naturally cool to room temperature;
7) the alloy coat grinding machine of pecker is carried out fine grinding process, make alloy coat diameter identical with pecker diameter, roughness reaches 3.2.
The composite construction pecker that this embodiment uses laser melting and coating technique to manufacture, alloy coat thickness 5mm, length 120mm.Through performance test, the average Rockwell hardness HRC=60.5 of coating, this pecker is compared with the pecker of homogenous material manufacture, and wearability improves 4.8 times.
Embodiment 2
The present embodiment is to manufacture the composite construction pecker that diameter is Φ 500mm, and step is as follows:
1) produce pecker with the steel that the trade mark is H13, and carry out mechanical turning to pecker working end, turning is of a size of: length is 130mm, the degree of depth is 5mm;
2) with acetone soln, pecker turning position is cleaned, to guarantee to remove matrix surface greasy dirt;
3) with heating tape, pecker turning position is heated to 500 DEG C, is incubated 10 hours, to guarantee pecker heat penetration;
4) alloyage powder, the mass percentage content of alloy powder is as follows: carbon C 1.2%, silicon Si 0.68%, iron Fe 2.4%, nickel 2.36%, chromium Cr 31.2%, molybdenum Mo 0.2%, tungsten W 12.8%, all the other are cobalt Co; Powder size is-140 ~+325 orders;
5) laser cladding equipment is adopted to carry out laser melting coating to the position that pecker turning is fallen.In laser cladding process, laser power is 3Kw; Laser scanning speed is 8mm/s; Spot diameter is 5mm; Focal length is 450mm; Powder feeding rate is 6g/min, finally makes alloy coat thickness reach 6mm; In laser cladding process, molten bath adopts high purity argon to protect, and gas flow is 5L/min;
6) by heat-preservation cotton the alloy coat of pecker wrapped and do slow cooling process, naturally cool to room temperature;
7) the alloy coat grinding machine of pecker is carried out fine grinding process, make alloy coat diameter identical with pecker diameter, roughness reaches 3.2.
The composite construction pecker that this embodiment uses laser melting and coating technique to manufacture, alloy coat thickness 5mm, length 130mm, the average Rockwell hardness HRC=61.5 of coating.Through performance test, this pecker is compared with the pecker of homogenous material manufacture, and the wearability of the pecker of compound structure for new residence improves 4.5 times.
Embodiment 3
The present embodiment is to manufacture the composite construction pecker that diameter is Φ 350mm, and step is as follows:
1) produce pecker with the steel that the trade mark is H13, and carry out mechanical turning to pecker working end, turning is of a size of: length is 150mm, the degree of depth is 5mm;
2) with acetone soln, pecker turning position is cleaned, to guarantee to remove matrix surface greasy dirt;
3) with heating tape, pecker turning position is heated to 550 DEG C, is incubated 6 hours, to guarantee pecker heat penetration;
4) alloyage powder, the mass percentage content of alloy powder is as follows: carbon C 0.9%, silicon Si 0.76%, iron Fe 2.46%, nickel 2.42%, chromium Cr 29.8%, molybdenum Mo 0.18%, tungsten W 15.6%, all the other are cobalt Co; Powder size is-140 ~+325 orders;
5) laser cladding equipment is adopted to carry out laser melting coating to the position that pecker turning is fallen.In laser cladding process, laser power is 2.8Kw; Laser scanning speed is 10mm/s; Spot diameter is 6mm; Focal length is 500mm; Powder feeding rate is 5g/min, finally makes alloy coat thickness reach 6.2mm; In laser cladding process, molten bath adopts high-purity nitrogen to protect, and gas flow is 4L/min;
6) by heat-preservation cotton the alloy coat of pecker wrapped and do slow cooling process, naturally cool to room temperature;
7) the alloy coat grinding machine of pecker is carried out fine grinding process, make alloy coat diameter identical with pecker diameter, roughness reaches 1.6.
The composite construction pecker that this embodiment uses laser melting and coating technique to manufacture, alloy coat thickness 5mm, length 150mm, the average Rockwell hardness HRC=60 of coating.Through performance test, this pecker is compared with the pecker of homogenous material manufacture, and the wearability of the pecker of compound structure for new residence improves 4.6 times.
Claims (1)
1. a preparation method for the seamless steel pipe pecker of composite construction, is characterized in that:
The structure of described pecker is: the working end of very easily wearing and tearing at pecker, is namely less than 150mm in distance working end end face length, there is alloy coat at the position of degree of depth 5mm; Its processing method is as follows:
1) produce pecker with hot-work die steel, and carry out mechanical turning to pecker working end, turning is of a size of: length is less than 150mm, the degree of depth is 5mm;
2) with acetone soln, pecker turning position is cleaned, to guarantee to remove matrix surface greasy dirt;
3) with heating tape, pecker turning position is heated to 400 DEG C ~ 550 DEG C, is incubated 6 ~ 12 hours, to guarantee pecker heat penetration;
4) alloyage powder, the mass percentage content of alloy powder is as follows: carbon C 0.7 ~ 1.5%, silicon Si 0.41 ~ 0.82%, iron Fe 2.16 ~ 2.85%, nickel 2.27 ~ 2.5%, chromium Cr 29.5 ~ 32.4%, molybdenum Mo 0.12 ~ 0.26%, tungsten W 8.7 ~ 17.8%, all the other are cobalt Co; Powder size is-140 ~+325 orders;
5) laser cladding equipment is adopted to carry out laser melting coating to the position that pecker turning is fallen; In laser cladding process, laser power is 2.5Kw ~ 3.5Kw; Laser scanning speed is 4mm/s ~ 10mm/s; Spot diameter is 4mm ~ 6mm; Focal length is 400mm ~ 500mm; Automatic powder feeding system is synchronous powder feeding system, and powder feeding rate is 5g/min ~ 10g/min; Alloy coat thickness is finally made to reach 5mm ~ 7mm; In laser cladding process, molten bath adopts high purity argon or nitrogen to protect, and gas flow is 4L/min ~ 8L/min;
6) by heat-preservation cotton the alloy coat of pecker wrapped and do slow cooling process, naturally cool to room temperature;
7) the alloy coat grinding machine of pecker is carried out fine grinding process, roughness reaches 1.6 ~ 3.2, and makes alloy coat diameter identical with pecker diameter.
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| CN201310029830.2A CN103128122B (en) | 2013-01-25 | 2013-01-25 | Seamless steel tube hole forming pin in composite structure and manufacturing method thereof |
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| CN104357835B (en) * | 2014-11-11 | 2017-02-22 | 中国兵器工业第五二研究所 | Method for preparing laser cladding iron-based coating on port machine pulley |
| CN104789960A (en) * | 2015-03-10 | 2015-07-22 | 内蒙古北方重工业集团有限公司 | Perforation needle with laser cladded cobalt based high chromium high tungsten alloy powder on surface and preparation method |
| CN107309431A (en) * | 2017-05-31 | 2017-11-03 | 太仓市微贯机电有限公司 | A kind of manufacturing process of superhard wolfram steel pecker |
| CN112122559B (en) * | 2020-09-24 | 2021-11-09 | 安徽中科春谷激光产业技术研究院有限公司 | Novel composite material guide for seamless steel pipe threading line |
| CN113199213B (en) * | 2021-04-30 | 2022-06-28 | 西安煤矿机械有限公司 | Manufacturing process of wear-resistant and corrosion-resistant central water pipe of rocker arm of coal mining machine |
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| JPS61144216A (en) * | 1984-12-18 | 1986-07-01 | Toyama Keikinzoku Kogyo Kk | Manufacture of die for hot extrusion press of aluminum and aluminum alloy |
| SU1733149A1 (en) * | 1989-10-31 | 1992-05-15 | Центральный научно-исследовательский институт черной металлургии им.И.П.Бардина | Press needle |
| DE102006048067A1 (en) * | 2006-10-11 | 2008-04-17 | Harburg-Freudenberger Maschinenbau Gmbh | Apparatus for extruding and the method for producing the tempering of an extruder |
| CN101596551A (en) * | 2009-07-03 | 2009-12-09 | 北京工业大学 | A kind of pairing gold plating seamless steel tube top and preparation method |
| CN102041502A (en) * | 2009-10-09 | 2011-05-04 | 韦星野 | Application of surface cladding technology to mould repair |
| CN102168210A (en) * | 2011-04-07 | 2011-08-31 | 杭州博华激光技术有限公司 | Laser cladding technological method and alloy material for laser cladding |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61144216A (en) * | 1984-12-18 | 1986-07-01 | Toyama Keikinzoku Kogyo Kk | Manufacture of die for hot extrusion press of aluminum and aluminum alloy |
| SU1733149A1 (en) * | 1989-10-31 | 1992-05-15 | Центральный научно-исследовательский институт черной металлургии им.И.П.Бардина | Press needle |
| DE102006048067A1 (en) * | 2006-10-11 | 2008-04-17 | Harburg-Freudenberger Maschinenbau Gmbh | Apparatus for extruding and the method for producing the tempering of an extruder |
| CN101596551A (en) * | 2009-07-03 | 2009-12-09 | 北京工业大学 | A kind of pairing gold plating seamless steel tube top and preparation method |
| CN102041502A (en) * | 2009-10-09 | 2011-05-04 | 韦星野 | Application of surface cladding technology to mould repair |
| CN102168210A (en) * | 2011-04-07 | 2011-08-31 | 杭州博华激光技术有限公司 | Laser cladding technological method and alloy material for laser cladding |
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