CN102230173B - Full-coating cladding thread element for parallel double-screw extruder - Google Patents
Full-coating cladding thread element for parallel double-screw extruder Download PDFInfo
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- CN102230173B CN102230173B CN 201010205228 CN201010205228A CN102230173B CN 102230173 B CN102230173 B CN 102230173B CN 201010205228 CN201010205228 CN 201010205228 CN 201010205228 A CN201010205228 A CN 201010205228A CN 102230173 B CN102230173 B CN 102230173B
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- cast steel
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- 238000005253 cladding Methods 0.000 title claims abstract description 34
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 239000011248 coating agent Substances 0.000 title claims abstract description 14
- 229910001208 Crucible steel Inorganic materials 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000010959 steel Substances 0.000 claims abstract description 23
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 20
- 238000005266 casting Methods 0.000 claims abstract description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000003754 machining Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- 238000002844 melting Methods 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 claims abstract description 6
- 230000007797 corrosion Effects 0.000 claims abstract description 6
- 238000004519 manufacturing process Methods 0.000 claims abstract description 6
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 238000005496 tempering Methods 0.000 claims description 14
- 238000005498 polishing Methods 0.000 claims description 12
- 238000005495 investment casting Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 8
- ZKSSUSUJIUSOCD-UHFFFAOYSA-N [Zr].[Yb] Chemical compound [Zr].[Yb] ZKSSUSUJIUSOCD-UHFFFAOYSA-N 0.000 claims description 6
- 238000003801 milling Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000004927 fusion Effects 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 229910000954 Medium-carbon steel Inorganic materials 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000005984 hydrogenation reaction Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims description 2
- 238000010309 melting process Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 claims 1
- 239000002131 composite material Substances 0.000 claims 1
- 229910001325 element alloy Inorganic materials 0.000 claims 1
- 238000004898 kneading Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 9
- 229910001315 Tool steel Inorganic materials 0.000 abstract description 4
- 238000007581 slurry coating method Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 235000011089 carbon dioxide Nutrition 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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- Powder Metallurgy (AREA)
Abstract
The invention relates to a manufacturing process and method for steel billet casting (or billet piece machining), spraying (or slurry coating), vacuum cladding (or gas shielding) and precise machining of a full-coating cladding thread sleeve and a kneading block (short for a thread element as follows)for a parallel double-screw extruder. The process is characterized in that the thread element in a complete melt state with high resistance and high corrosion resistance is formed by mutually melting a cast steel billet (or a machined billet piece) and a nickel base or nickel based tungsten carbide. The full-coating cladding thread element manufactured according to the invention has the advantages of reasonable structure, advanced industries and excellent wear resistance and corrosion resistance and belongs to novel domestic initiative products manufactured by novel processes and novel materials. The thread element for the parallel double-screw extrude, provided by the invention, can satisfy technical regulations and use requirements of the parallel double-screw extruder in both mechanical property and mechanical property and is largely superior to traditional high-speed tool steel (W6MO5CR4V2) in each comprehensive property.
Description
Technical field
The present invention relates to a kind of parallel double-screw extruder with the manufacture method of full coating pairing gold cladding type thread bush, kneading block.
Background technology
Along with after China's plastic cement industry, feedstuff industry, building material industry, line cable industry use parallel double-screw extruder in large quantities, greatly having changed single screw extrusion machine, to extrude powder single, and mixing uniformity is poor, the not high defective of output.But because the property indices of parallel double-screw extruder improves constantly, and the kind of extruded material is day by day various, as after adding the strong material of a lot of toughness reinforcing, enhancings, wear-resistant, shearing resistance, corrodibility, so just to anti-anti-, corrosion-resistant the having higher requirement of the screwing element in the parallel double-screw extruder.On the basis of most domestic use 38CR2MOAL2 nitrogen steel, increased again the screwing element of rapid tool steel (W6MO5CR4V2); and be exactly to have used this expensive, steel grade that difficulty of processing is high; after having added therein the materials such as glass such as high composition, calcium carbonate, carbonic acid gas; generally after 2～4 months, namely suffer heavy wear and shut down replacing its work-ing life; and full coating cladding type pairing gold shell line element can with the situation of above identical material under improve work-ing life more than 6 months, maximum duration can reach 1 year more than the usage period.Be more than 3 times of (W6MO5CR4V2) mean life, and market value only is about the twice of (W6MO5CR4V2).Complete succeeding in developing with industrialization of coating cladding type screwing element used, the upgrading of China's parallel double-screw extruder will be promoted greatly, can compare favourably in performance with the parallel double-screw extruder of world first-class brand, have very significantly economic benefit and social benefit.
Summary of the invention
The product performance of the inventive method preparation are as follows:
The main application fields of full-coating cladding thread element for parallel double-screw extruder is plastics machinery industry, cable machinery industry, building material machinery industry and feed manufacturing machine industry etc., and every technical parameter of cladding type screwing element sees Table 1 and table 2:
Table 1
| Title | The model classification | Specification Mm | Tensile strength mpa | Hardness HRC | Mutual crucible zone μ m | Cladding layer density g/cm 3 | Wear resistance | Rotproofness |
| Thread bush | L/10T | 20～300 | ≥300 | ≥60 | ≥64 | 9.75 | Good | Good |
| Thread bush | L/15T | 20～300 | ≥300 | ≥60 | ≥64 | 10.20 | Good | Good |
| Thread bush | L/20T | 20～300 | ≥300 | ≥60 | ≥64 | 10.60 | Good | Good |
| Thread bush | L/25T | 20～300 | ≥300 | ≥60 | ≥64 | 11.00 | Good | Good |
| Thread bush | L/30T | 20～300 | ≥300 | ≥60 | ≥64 | 11.50 | Good | Good |
| Thread bush | L/35T | 20～300 | ≥300 | ≥60 | ≥64 | 12.00 | Good | Good |
Table 2
| Title | The model classification | Specification Mm | Tensile strength mpa | Hardness HRC | Mutual crucible zone μ m | Cladding layer density g/cm 3 | Wear resistance | Rotproofness |
| Kneading block | L/10T | 20～300 | ≥300 | ≥60 | ≥64 | 9.75 | Good | Good |
| Kneading block | L/15T | 20～300 | ≥300 | ≥60 | ≥64 | 10.20 | Good | Good |
| Kneading block | L/20T | 20～300 | ≥300 | ≥60 | ≥64 | 10.60 | Good | Good |
| Kneading block | L/25T | 20～300 | ≥300 | ≥60 | ≥64 | 11.00 | Good | Good |
| Kneading block | L/30T | 20～300 | ≥300 | ≥60 | ≥64 | 11.50 | Good | Good |
| Kneading block | L/35T | 20～300 | ≥300 | ≥60 | ≥64 | 12.00 | Good | Good |
The full-coating cladding thread element for parallel double-screw extruder beneficial effect of the invention is: full-coating cladding thread element for parallel double-screw extruder of the present invention rational in infrastructure, technique is advanced, combination rate and wear-resisting and corrosion resistance nature are better than rapid tool steel (W6MO5CR4V2) greatly; Again because the medium carbon steel base base of full-coating cladding thread element for parallel double-screw extruder replaces traditional bar process for machining with precision casting, only need tradition mach 1/3rd with the material amount, can be country and save a large amount of high-quality steel; Owing to adopted tungsten carbide of nickel-base cladding novel process novel material, the wear resisting property of screwing element and corrosion resistance nature can reach more than 4 times of rapid tool steel (W6MO5CR4V2) again.Cladding type screwing element is the product innovation of the novel process novel material of domestic initiation, it not only can reduce significantly the starting material production cost, save high-quality steel resource, and cost performance is high, fill up the novel process of China's parallel double-screw extruder industry blank, the new technology of novel material for one especially, have significantly economic benefit and social benefit.
Description of drawings
Fig. 1 kneading block structure iron.
Fig. 2 kneading block coating synoptic diagram.
Fig. 3 threaded rod structure iron.
Fig. 4 threaded rod coating synoptic diagram.
Fig. 5 Ni-WC alloy micro-structural feature.
Fig. 6 Wear Resistance trial report.
Embodiment
According to following embodiment, the present invention may be better understood.Yet, those skilled in the art will readily understand that embodiment is described only to be used for explanation the present invention, and should also can not limit the present invention described in detail in claims.
Embodiment 1:
1, the technical process for casting of steel billet
A, cured molded work: according to the casting accuracy standard of steel billet, select good U.S. produce in temperature cured, Australia produces zirconium ytterbium sand and makes the cured mould of casting;
B, selection precision casting steel: according to the casting accuracy technical specifications of steel billet, the steel ingot that selector alloying billet quality requires;
C, intermediate frequency furnace melting: selected casting is dosed into the intermediate frequency furnace melting of heating with steel ingot, and stirs, Control for Kiln Temperature is at 1450 ℃;
D, accurate casting steel billet: the liquid steel aqueous fusion liquid with fully melting liquefaction and stir in the intermediate frequency furnace, water one by one and smash cured mould steel billet;
E, the demoulding are deburred: the cast steel base until cast molding fully cools off the rear demoulding, removes the zirconium ytterbium sand and the cast steel base burr that remain on the cast steel base;
F, tempering: with the cast steel base screwing element of precision casting, internal stress is removed in tempering in 350 ℃ tempering stove, prevents hydrogen embrittlement;
G, polishing: will put into the polishing machine polishing through the cast steel base screw thread distant view after the tempering, and remove hydrogenation skin and the residual impurity such as zirconium ytterbium sand;
H, check: the cast steel base screwing element after will polishing is delivered check, and the qualified product vanning is stand-by.
2, spray welding process flow process
A, digital controlled lathe on the cast steel base screwing element is pressed drawing dimensional precision processing end flat and endoporus, upper milling machine is processed into the surfacing standardized component by the drawing dimensional precision;
B, with broaching machine on the surfacing standardized component of cast steel base screwing element, press drawing dimension precision requirement control endoporus spline;
C, the cast steel base screwing element that will draw the endoporus spline are put into the polishing machine polishing, remove product surface oxide skin and burr;
D, polished cast steel base screwing element is placed the nitrogen protection bucket, prevent that the product ingress of air from producing oxidation;
E, the cast steel base screwing element in the nitrogen protection bucket taken out penetrate rapidly on the splined shaft, after preheating on the spray bed, spraying tungsten carbide of nickel-base powder;
F, check: the screwing element to spraying tungsten carbide of nickel-base powder is tested, and lower road cladding operation is transferred in circulation behind the qualified product.
3, melting and coating process flow process
A, the screwing element that will spray Ni-based powder or tungsten carbide of nickel-base are packed into and are treated cladding in the vacuum electric furnace;
B, fill nitrogen in the vacuum electric furnace of the spraying tungsten carbide of nickel-base screwing element of packing into, nitrogen pressure is 0.1kg/m
3
The vacuum electric furnace cladding temperature of c, tungsten carbide of nickel-base screwing element is 900-1100 ℃;
D, with the tungsten carbide of nickel-base screwing element tempering in tempering stove after the cladding, eliminate internal stress, prevent hydrogen embrittlement;
F, check: the tungsten carbide of nickel-base screwing element after cladding and the tempering is estimated and instrument testing the lower road of qualified product vanning circulation machining processes.
4, mechanical processing technique flow process
A, will carry out through the screwing element salable product of fusion covered nickel base carbide layers line cutting processing end face;
B, will be through lathe in machining end face and inner bore chamfering on the line cutting rear thread element;
C, will be through CNC milling machine processing overall dimensions on the screwing element after the lathe in machining;
D, will roughly grind through numerically control grinder on the screwing element after the CNC milling machine processing, half correct grinding, ground finish, be taken up in order of priority with 80#, 100#, 120# grinding wheel;
E, inspection after construction: to testing one by one, detect, shunt qualified and substandard product through the screwing element product after cladding and the mechanical workout;
F, to check, detect qualified cladding type screwing element product and carry out the class wrapping warehouse-in.
Claims (1)
1. full-coating cladding thread element for parallel double-screw extruder, it is characterized by: at the cast steel base surface uniform of the screwing element precision casting tungsten carbide of nickel-base layer of cladding last layer high abrasion and corrosion resistance nature with one heart, guarantee to reach after the cast steel base of precision casting and the tungsten carbide of nickel-base cladding the metallurgical attitude composite bed of fully fully mutually molten shape; The cast steel base of wherein said screwing element precision casting is the medium carbon steel base base of precision casting; Described tungsten carbide of nickel-base powder consist of cladded type tungsten carbide of nickel-base powder; Described screwing element alloy layer thickness is 1～2.5mm, and the thickness of mutual crucible zone 〉=64 μ m;
Simultaneously, its manufacture method and technical process are as follows:
1) technical process for casting of steel billet
A, wax-pattern are made: according to the casting accuracy standard of steel billet, select warm wax in the good U.S. product, Australia produces zirconium ytterbium sand and makes the casting wax-pattern;
B, selection precision casting steel: according to the casting accuracy technical specifications of steel billet, the steel ingot that selector alloying billet quality requires;
C, intermediate frequency furnace melting: selected casting is dosed into the intermediate frequency furnace melting of heating with steel ingot, and stirs, Control for Kiln Temperature is at 1450 ℃;
D, accurate casting steel billet: the liquid steel aqueous fusion liquid with fully melting liquefaction and stir in the intermediate frequency furnace, water one by one and smash the wax-pattern steel billet;
E, the demoulding are deburred: the cast steel base until cast molding fully cools off the rear demoulding, removes the zirconium ytterbium sand and the cast steel base burr that remain on the cast steel base;
F, tempering: with the cast steel base screwing element of precision casting, internal stress is removed in tempering in 350 ℃ tempering stove, prevents hydrogen embrittlement;
G, polishing: will put into the polishing machine polishing through the cast steel base screwing element after the tempering, and remove hydrogenation skin and residual zirconium ytterbium sand impurity;
H, check: the cast steel base screwing element after will polishing is delivered check, and the qualified product vanning is stand-by;
2) spray welding process flow process
A, digital controlled lathe on the cast steel base screwing element is pressed drawing dimensional precision processing end flat and endoporus, upper milling machine is processed into the surfacing standardized component by the drawing dimensional precision;
B, with broaching machine on the surfacing standardized component of cast steel base screwing element, press drawing dimension precision requirement control endoporus spline;
C, the cast steel base screwing element that will draw the endoporus spline are put into the polishing machine polishing, remove product surface oxide skin and burr;
D, polished cast steel base screwing element is placed the nitrogen protection bucket, prevent that the product ingress of air from producing oxidation;
E, the cast steel base screwing element in the nitrogen protection bucket taken out penetrate rapidly on the splined shaft, after preheating on the spray bed, spraying tungsten carbide of nickel-base powder;
F, check: the screwing element to spraying tungsten carbide of nickel-base powder is tested, and lower road cladding operation is transferred in circulation behind the qualified product;
3) melting and coating process flow process
A, the screwing element that will spray tungsten carbide of nickel-base are packed into and are treated cladding in the vacuum electric furnace;
B, fill nitrogen in the vacuum electric furnace of the spraying tungsten carbide of nickel-base screwing element of packing into, nitrogen pressure is 0.1kg/m
3
The vacuum electric furnace cladding temperature of c, tungsten carbide of nickel-base screwing element is 900-1100 ℃;
D, with the tungsten carbide of nickel-base screwing element tempering in tempering stove after the cladding, eliminate internal stress, prevent hydrogen embrittlement;
F, check: the tungsten carbide of nickel-base screwing element after cladding and the tempering is estimated and instrument testing the lower road of qualified product vanning circulation machining processes;
4) mechanical processing technique flow process
A, will carry out through the screwing element salable product of fusion covered nickel base carbide layers line cutting processing end face;
B, will be through lathe in machining end face and inner bore chamfering on the line cutting rear thread element;
C, will be through CNC milling machine processing overall dimensions on the screwing element after the lathe in machining;
D, will roughly grind through numerically control grinder on the screwing element after the CNC milling machine processing, half correct grinding, ground finish, be taken up in order of priority with 80#, 100#, 120# grinding wheel;
E, inspection after construction: to testing one by one, detect, shunt qualified and substandard product through the screwing element product after cladding and the mechanical workout;
F, to check, detect qualified cladding type screwing element product and carry out the class wrapping warehouse-in.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010205228 CN102230173B (en) | 2010-06-22 | 2010-06-22 | Full-coating cladding thread element for parallel double-screw extruder |
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| CN 201010205228 CN102230173B (en) | 2010-06-22 | 2010-06-22 | Full-coating cladding thread element for parallel double-screw extruder |
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| CN102230173B true CN102230173B (en) | 2013-04-24 |
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| CN106702304B (en) * | 2017-01-22 | 2019-06-11 | 石家庄市藁城区北创刀具有限公司 | A kind of wearing layer preparation method of greenfeed dedicated tool |
| CN113147150B (en) * | 2021-04-16 | 2021-10-19 | 大庆市华禹石油机械制造有限公司 | Manufacturing process of thread of oil pipe without sticking |
| CN113774310A (en) * | 2021-08-11 | 2021-12-10 | 佛山桃园先进制造研究院 | Spray welding method for screw coating |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258323A (en) * | 1997-05-28 | 2000-06-28 | 保罗·卡伦 | Surface wear-resistant sintered component and manufacturing method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61266209A (en) * | 1985-05-20 | 1986-11-25 | Hitachi Metals Ltd | Non-magnetic corrosion resistant, wear resistant screw |
| JP2008001081A (en) * | 2006-05-22 | 2008-01-10 | Fujifilm Corp | Cellulosic resin film and method for producing the same |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258323A (en) * | 1997-05-28 | 2000-06-28 | 保罗·卡伦 | Surface wear-resistant sintered component and manufacturing method thereof |
Non-Patent Citations (4)
| Title |
|---|
| JP昭61－266209A 1986.11.25 |
| 苏炳基等.高耐磨耐蚀SJ-45B型塑料挤出机螺杆的喷焊新工艺.《精密制造与自动化》.1982,(第2期),第56～59页. * |
| 霍影等.稀土对真空熔覆Ni基/WC涂层组织结构的影响.《材料保护》.2005,第38卷(第8期),第13～15页. * |
| 黄志强等.超音速火焰喷涂强化物探螺旋钻杆试验研究.《物探装备》.2007,第17卷(第3期),第167～170页. * |
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