CN103042071B - A kind of Double-metal composite elbow and production method thereof - Google Patents
A kind of Double-metal composite elbow and production method thereof Download PDFInfo
- Publication number
- CN103042071B CN103042071B CN201310005026.0A CN201310005026A CN103042071B CN 103042071 B CN103042071 B CN 103042071B CN 201310005026 A CN201310005026 A CN 201310005026A CN 103042071 B CN103042071 B CN 103042071B
- Authority
- CN
- China
- Prior art keywords
- interior pipe
- outer tube
- double
- elbow
- metal composite
- 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.)
- Active
Links
Landscapes
- Branch Pipes, Bends, And The Like (AREA)
Abstract
The present invention proposes a kind of Double-metal composite elbow production method, comprise step: will the alloy solution of antifriction metal (AFM) be included, cast the interior pipe of elbow; Intercept the outer tube that size matches with described interior pipe, heating is carried out to described outer tube and makes it expand, under outer tube is in described swelling state, described outer tube pushes against sleeve is received described interior pipe outside, outer tube cooling after-contraction, fastening described interior pipe, forms Double-metal composite elbow with described interior pipe.The present invention also provides a kind of Double-metal composite elbow, comprises pipe in being cast by antifriction metal (AFM), and in their inflated state pushes against sleeve receive that described interior pipe is outside, the outer tube of fastening described interior pipe after cooling, the size of described outer tube matches with described interior pipe.A kind of Double-metal composite elbow of the present invention and production method thereof, the bubble of interior pipe and trachoma are less, wearability and crushing resistance higher.
Description
Technical field
The present invention relates to technical field of engineering machinery, especially relate to a kind of Double-metal composite elbow and production method thereof.
Background technology
Concrete mixer utilizes pressure by the machinery of concrete along pipeline continus convergence, comparatively common in constructions work, is made up of concrete pump and carrier pipe etc.During delivering concrete, the power having concrete pump to provide suitable, makes concrete deliver to destination by carrier pipe under suitable pressure effect.
Carrier pipe elbow is the necessary building block of carrier pipe at turning, when delivering concrete, the inwall of the concrete continuous erosive wear carrier pipe elbow of flowing, after the concrete of conveying reaches certain side amount, carrier pipe elbow can lose efficacy because of concrete continuous wearing and tearing, now just need the carrier pipe elbow more renewed, cause project progress slowly and construction cost increase.Therefore, for reducing the impact of the carrier pipe elbow broken invalid caused because concrete washes away, need the wearability as far as possible improving carrier pipe elbow, to increase the service life of carrier pipe elbow.
In prior art, in order to increase the service life of carrier pipe elbow, adopting the composite elbow of double-level-metal, namely increasing again in one deck wear-resistant material in elbow inside and managing.Comparatively conventional a kind of technological means is inject the alloy solution of wear-resistant material within the outer tube, solidify pipe in rear formation, overall anti-wear performance is increased by the wearability of interior pipe, and due to cast in pipe time, directly depend on outer tube as shaping mould, the radian of outer pipe internal surface and uneven, the flowing of alloy solution can be made even not, easy generation bubble and trachoma, and the position at bubble and trachoma place is comparatively fragile on interior pipe, its wearability ability and compressive property all lower, concrete constantly wash away under, very easily damaged, cause the hydraulic performance decline of whole elbow.
Therefore, there is compressive property and the not high technological deficiency of anti-wear performance in the production technology of the bi-metal composite delivery pipe of prior art.
There are some wear resistant products in prior art due to the restriction by material itself, can only heat treatment method be passed through, improve some hardness, increase a little abrasion resistance, far can not arrive higher wear-resisting requirement, and rich chromium cast iron be more efficiently technological means.
Rich chromium cast iron is the abbreviation of high chromium white antifriction cast iron, high chromium white antifriction cast iron is a kind of anti-friction material of function admirable, and it is higher than steel alloy higher wearability, has higher toughness and intensity again than general white cast-iron, also have good high-temperature-resistant and anti-corrosion performance concurrently simultaneously, in addition it is convenient to produce, moderate cost, is described as the most excellent contemporary abrasion-resistant material, can be used for mining, cement, electric power, the fields such as road building machine are as parts such as liner plate, tup, abrading-balls.
Therefore, preferably, in embodiments of the present invention, in view of the good anti-wear performance of rich chromium cast iron, described interior pipe is pipe in rich chromium cast iron.
Preferably, in embodiments of the present invention, described outer tube 1 can adopt seamless steel pipe, more preferably, can select No. 20 seamless steel pipes meeting GB8163-2008 standard.
A kind of Double-metal composite elbow of the present embodiment and production method thereof, by first casting interior pipe, then receive the technical approach on interior pipe by outer tube sleeve, and the casting process of interior pipe is not limited by outer tube, more easily reduces the generation of pore and trachoma.
Simultaneously, pipe in rich chromium cast iron selected by interior pipe, anti-wear performance is better, seamless steel pipe selected by outer tube, has good compressive property, and outer tube and interior pipe are achieved by the mode of expanding with heat and contract with cold and fit tightly, thus make the composite conveying pipe elbow of this kind of method output, compressive property and anti-wear performance are all higher, extend service life, thus reduce construction cost.
Summary of the invention
The present invention proposes a kind of Double-metal composite elbow and production method thereof, compressive property and the higher composite elbow of anti-wear performance can be produced.
In order to achieve the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of Double-metal composite elbow production method, comprise step:
Steps A, will include the alloy solution of antifriction metal (AFM), cast the interior pipe of elbow;
Step B, intercepts the outer tube that size matches with described interior pipe, carries out heating make it expand to described outer tube, described outer tube pushes against sleeve is received described interior pipe outside, and outer tube cooling after-contraction, fastening described interior pipe, forms Double-metal composite elbow with described interior pipe.
Wherein, described steps A comprises step:
The mould of pipe in elbow is made with precoated sand;
The alloy solution including antifriction metal (AFM) is poured in the elbow module that precoated sand makes, casts the interior pipe of elbow.
Wherein, described antifriction metal (AFM) is chromium, and by percentage to the quality, described alloy solution is the high-chromium cast iron alloy solution of chromium content 10%-30%, also comprises step before described steps A:
Steel smelting is become molten steel;
Be equipped with chrome ore according to chromium content 10%-30%, and add molybdenum, niobium, boron, tungsten, manganese, carbon, sulphur smelts, smelt for high-chromium cast iron alloy solution.
Wherein, after described steps A, also described interior pipe is heat-treated before described step B, specifically comprises step:
Described interior pipe is heated to 920-980 DEG C, insulation 2-8 hour;
By described interior pipe slow cooling to 700-750 DEG C, insulation 4-10 hour;
By the slow cooling to 600 DEG C of described interior pipe, Air flow after coming out of the stove.
Wherein, in described step B to described outer tube carry out heating make its expand before also comprise step:
Described outer tube end welding junction flange.
The present invention also provides a kind of Double-metal composite elbow, comprise pipe in being cast by antifriction metal (AFM) alloy solution, pushes against sleeve receives the outer tube that described interior pipe is outside, cool rear fastening described interior pipe in their inflated state, and the size of described outer tube matches with described interior pipe.
Wherein, described interior pipe is pipe in rich chromium cast iron.
Wherein, the pipe thickness of described interior pipe is 2-3 millimeter.
Wherein, described outer tube is seamless steel pipe.
Wherein, the end of described outer tube is connected with flange.
Visible, the present invention at least has following beneficial effect:
A kind of Double-metal composite elbow of the present invention and production method thereof, the production of its composite elbow, first cast interior pipe, after interior pipe is cast, intercept the outer tube that size matches with described interior pipe, carrying out heating to described outer tube makes it expand, under outer tube is in described swelling state, described outer tube pushes against sleeve is received described interior pipe outside, outer tube cooling after-contraction, fastening described interior pipe, form Double-metal composite elbow with described interior pipe, like this, the casting of interior pipe is without the need to relying on outer tube, have more controllability, the probability that bubble and trachoma are produced reduces;
Described outer tube is heated, makes it expand, described outer tube pushes against sleeve is received described interior pipe outside, outer tube cooling after-contraction, fastening described interior pipe, forms Double-metal composite elbow with described interior pipe, when outer tube is in swelling state, can gap be there is between inner and outer tubes, and when after outer tube cooling, due to principle of expanding with heat and contracting with cold, the internal diameter of outer tube can be made to reduce, hold interior pipe tightly, inner and outer tubes are combined closely, and so just eliminate the gap between inner and outer tubes.If there is gap between inner and outer tubes, concrete pressure can be made to bear primarily of interior pipe, although the material wearability of interior pipe is better, anti-pressure ability is often not enough, thus the compressive property of whole multiple tube is reduced.And inner and outer tubes of the present invention fit tightly, the gap between eliminating due to inner and outer pipes and the lower problem of the compressive property caused, enhance the crushing resistance of interior pipe, thus enhance the performance of whole Double-metal composite elbow;
Further, described interior pipe is that the high-chromium cast iron alloy solution of chrome content 10%-30% is cast, and has good anti-wear performance;
Further, internal pipe is heat-treated, and adds the hardness of interior pipe, makes the compressive property of whole Double-metal composite elbow better.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic flow sheet of the embodiment one of a kind of Double-metal composite elbow production method of the present invention;
Fig. 2 is the generalized section of the embodiment one of a kind of Double-metal composite elbow of the present invention;
Fig. 3 is the schematic flow sheet of the embodiment two of a kind of Double-metal composite elbow production method of the present invention;
Fig. 4 is the generalized section of the embodiment two of a kind of Double-metal composite elbow of the present invention.
Detailed description of the invention
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
The embodiment of the present invention one provides a kind of Double-metal composite elbow production method, shown in Figure 1, comprises step:
Step S110: will include the alloy solution of antifriction metal (AFM), casts the interior pipe of elbow.
In embodiments of the present invention, adopt pipe in first casting, then the mode interior pipe being pushed outer tube makes composite elbow.
Preferably, the casting of interior pipe can adopt following process: the mould making pipe in elbow with precoated sand, is poured into by the alloy solution including antifriction metal (AFM) in the elbow module that precoated sand makes, casts the interior pipe of elbow.
Precoated sand venting quality is good, not easily occurs pore and trachoma, and the interior pipe finished surface of output is more smooth.
Step S111: intercept the outer tube that size matches with described interior pipe, carry out heating make it expand to described outer tube, receives described interior pipe outside by described outer tube pushes against sleeve, outer tube cooling after-contraction, fastening described interior pipe, forms Double-metal composite elbow with described interior pipe.
The size of outer tube should be closed with the matching size of described interior pipe, comprise camber, external diameter, the isoparametric cooperation of pipe thickness, make outer tube pushes against sleeve can receive the outside of described outer tube, and interior pipe can bear the pressure of outer tube, those skilled in the art can according to the explanation of the embodiment of the present invention, carry out concrete flexible adjustment and enforcement, the embodiment of the present invention is not specifically limited.
The present embodiment additionally provides a kind of Double-metal composite elbow, comprises outer tube 1 and interior pipe 2 see Fig. 2.
Interior pipe 2 is cast by antifriction metal (AFM), and outer tube 1 in their inflated state pushes against sleeve receives described interior pipe 2 outside, the rear fastening described interior pipe 2 of cooling, and its size matches with described interior pipe 2.
Embodiment two
The embodiment of the present invention two provides a kind of Double-metal composite elbow production method, as shown in Figure 3, comprises step:
Step S210: steel smelting is become molten steel, is equipped with chrome ore according to chromium content 10%-30%, and add molybdenum, niobium, boron, tungsten, manganese, carbon, sulphur smelts, smelt for high-chromium cast iron alloy solution.
Preferably, select less than No. 20 steel to smelt as raw material, more preferably, can steel scrap be selected, to reduce production cost.
Those skilled in the art are known, and 20 in No. 20 steel refer to phosphorus content herein, and No. 20 steel refer to the mild steel that phosphorus content is 0.2%, less than No. 20 steel refer to phosphorus content lower than 0.2% various model mild steel.
Be primary raw material by the molten steel smelted, take chrome ore as principal ingredients, and add the auxiliary ingredients such as carbon, tungsten, configure in proportion, smelt.
Wherein the allocation ratio of chrome ore and steel should make the comprehensive content of chromium between 11%-30%.
In smelting process, along with temperature improves, according to time sequencing, different batchings is added in stove and is smelted into high-chromium cast iron alloy solution.
Although rich chromium cast iron has good antiwear characteristic, but, difficulty of construction rich chromium cast iron being cast as pipe is larger, program is comparatively complicated, need to add multiple batching, in embodiments of the present invention, preferably, the auxiliary ingredients added has molybdenum, niobium, boron, tungsten, manganese, carbon, sulphur, wherein the mass percentage content of various auxiliary ingredients is followed successively by: 1.5-2.5%, 0.6-0.9%, 1.3-2.3%, 3.5-5%, 0.8-1.2%, 2.0-3.6% and 1.9-2.7%, more preferably, the mass percentage content of each auxiliary ingredients is followed successively by: 1.5%, 0.9%, 1.3%, 3.5%, 0.8%, 2.7% and 2.1%.
Those skilled in the art can take a hint from the technical scheme of the present embodiment, according to actual needs, make adjustment, also should belong to protection scope of the present invention to the order of addition of each batching and batching and mass percent.
Make the high-chromium alloy cast tube elbow of various different angles, different-thickness according to actual needs.Adopt the interior pipe of rich chromium cast iron elbow that described in the present embodiment, scheme is cast, the interior pipe of diameter less than 150 millimeters, thin place can cast 2-3 millimeter.
Step S211: described interior pipe is heat-treated.
Described step also comprises step after casting interior pipe:
Described interior pipe is heated to 920-980 DEG C, insulation 2-8 hour; By described interior pipe slow cooling to 700-750 DEG C, insulation 4-10 hour; By the slow cooling to 600 DEG C of described interior pipe, Air flow after coming out of the stove.
The heat treatment carried out described interior pipe can strengthen the hardness of interior pipe further.
Step S212: intercept the outer tube that size matches with described interior pipe, carrying out heating to described outer tube makes it expand, under outer tube is in described swelling state, described outer tube pushes against sleeve is received described interior pipe outside, outer tube cooling after-contraction, fastening described interior pipe, forms Double-metal composite elbow with described interior pipe.
Before heating outer tube, also at described outer tube end welding junction flange.
The present embodiment also provides a kind of Double-metal composite elbow, shown in Figure 4, comprises pipe 2 in being cast by antifriction metal (AFM), and in their inflated state pushes against sleeve receive that described interior pipe 2 is outside, the outer tube 1 of fastening described interior pipe 2 after cooling, and flange 3.
The size of described outer tube 1 matches with described interior pipe 2.
When outer tube is in swelling state, there is less pressure between outer tube 1 and interior pipe 2, when outer tube 1 is in the state of cooling, combine closely between outer tube 1 and interior pipe 2, described interior pipe 2 held tightly by outer tube 1.
In embodiment two, described in embodiment one, preferably, described interior pipe 2 is pipe in rich chromium cast iron, and described outer tube 1 is No. 20 seamless steel pipes.
The technical scheme provided according to the embodiment of the present invention implements the composite conveying pipe elbow produced, and weight is 15 kilograms to 16 kilograms.
A kind of Double-metal composite elbow of the embodiment of the present invention two and production method thereof, the casting of interior pipe is without the need to relying on outer tube, and the probability that bubble and trachoma produce reduces., described outer tube is heated meanwhile, make it expand, described outer tube pushes against sleeve is received described interior pipe outside, outer tube cooling after-contraction, fastening described interior pipe, Double-metal composite elbow is formed with described interior pipe, inner and outer tubes are combined closely, and enhance the crushing resistance of interior pipe, and simultaneously, pipe adopts pipe in the good rich chromium cast iron of wearability, internal layer is wear-resisting, outer resistance to compression, ectonexine is combined closely, thus enhances the performance of whole Double-metal composite elbow.
Last it is noted that above embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a Double-metal composite elbow production method, is characterized in that, comprises step:
Steps A, will include the alloy solution of antifriction metal (AFM), cast the interior pipe of elbow;
Step B, intercepts the outer tube that size matches with described interior pipe, carries out heating make it expand to described outer tube, described outer tube pushes against sleeve is received described interior pipe outside, and outer tube cooling after-contraction, fastening described interior pipe, forms Double-metal composite elbow with described interior pipe.
2. Double-metal composite elbow production method according to claim 1, is characterized in that, described steps A comprises step:
The mould of pipe in elbow is made with precoated sand;
The alloy solution including antifriction metal (AFM) is poured in the elbow module that precoated sand makes, casts the interior pipe of elbow.
3. Double-metal composite elbow production method according to claim 1, is characterized in that, described antifriction metal (AFM) is chromium, and by percentage to the quality, described alloy solution is the high-chromium cast iron alloy solution of chromium content 10%-30%, also comprises step before described steps A:
Steel smelting is become molten steel;
Be equipped with chrome ore according to chromium content 10%-30%, and add molybdenum, niobium, boron, tungsten, manganese, carbon, sulphur smelts, smelt for high-chromium cast iron alloy solution.
4. Double-metal composite elbow production method according to claim 1, is characterized in that, after described steps A, also heat-treats described interior pipe, specifically comprise step before described step B:
Described interior pipe is heated to 920-980 DEG C, insulation 2-8 hour;
By described interior pipe slow cooling to 700-750 DEG C, insulation 4-10 hour;
By the slow cooling to 600 DEG C of described interior pipe, Air flow after coming out of the stove.
5. the Double-metal composite elbow production method according to any one of claim 1 or 4, is characterized in that, in described step B to described outer tube carry out heating make its expand before also comprise step:
Described outer tube end welding junction flange.
6. a kind of Double-metal composite elbow that the production method described in any one of claim 1-5 is obtained, it is characterized in that, comprise pipe in being cast by antifriction metal (AFM) alloy solution, pushes against sleeve receives the outer tube that described interior pipe is outside, cool rear fastening described interior pipe in their inflated state, and the size of described outer tube matches with described interior pipe.
7. Double-metal composite elbow according to claim 6, is characterized in that, described interior pipe is pipe in rich chromium cast iron.
8. Double-metal composite elbow according to claim 7, is characterized in that, the pipe thickness of described interior pipe is 2-3 millimeter.
9. the Double-metal composite elbow according to any one of claim 6 to 8, is characterized in that, described outer tube is seamless steel pipe.
10. the Double-metal composite elbow according to any one of claim 6 to 8, is characterized in that, the end of described outer tube is connected with flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005026.0A CN103042071B (en) | 2013-01-07 | 2013-01-07 | A kind of Double-metal composite elbow and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310005026.0A CN103042071B (en) | 2013-01-07 | 2013-01-07 | A kind of Double-metal composite elbow and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103042071A CN103042071A (en) | 2013-04-17 |
| CN103042071B true CN103042071B (en) | 2015-09-30 |
Family
ID=48055065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310005026.0A Active CN103042071B (en) | 2013-01-07 | 2013-01-07 | A kind of Double-metal composite elbow and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103042071B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976475A (en) * | 2015-06-15 | 2015-10-14 | 淄博滕坤工贸有限公司 | High-alloy and wear-resistant double-layer bend for concrete pump truck |
| CN106287091A (en) * | 2016-10-20 | 2017-01-04 | 许学华 | A kind of double-layer wear-resistant pipe and preparation method thereof |
| CN112780865B (en) * | 2021-01-15 | 2023-07-04 | 蓬莱水城铸石管道阀门有限公司 | Manufacturing method of cast stone composite elbow and cast stone composite elbow |
| CN113862660B (en) * | 2021-09-10 | 2023-11-14 | 江阴市东泰管件有限公司 | High-compression-resistance butt-welded elbow and processing technology thereof |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52813B2 (en) * | 1973-05-11 | 1977-01-11 | ||
| JPS57175066A (en) * | 1981-04-17 | 1982-10-27 | Kubota Ltd | Production of double pipe by centrifugal casting |
| CN201184456Y (en) * | 2008-04-28 | 2009-01-21 | 上海得锡乐汽车配件有限公司 | High wear resistant conveying bent tube |
| CN101413604B (en) * | 2008-10-17 | 2011-06-15 | 江苏明雨耐磨材料有限公司 | Duplex-metal abrasion-proof bent tube |
| CN201810920U (en) * | 2010-09-21 | 2011-04-27 | 东莞市吉川机械设备有限公司 | Bimetal protective bending pipe |
| CN102794601B (en) * | 2011-05-23 | 2015-08-26 | 周照耀 | A kind of manufacture method of wear-resisting, corrosion-resistant, shock resistance Bending Pipes |
| CN102278550B (en) * | 2011-07-07 | 2012-12-26 | 中联重科股份有限公司 | Concrete transporting pipe and manufacturing method thereof |
| CN102537536A (en) * | 2012-02-09 | 2012-07-04 | 三一重工股份有限公司 | Composite bending-straight tube, concrete pump truck and manufacture method of composite bending-straight tube |
| CN102705225B (en) * | 2012-05-28 | 2015-05-13 | 三一集团有限公司 | Composite concrete conveying cylinder and manufacturing method thereof, and pumping mechanism and concrete conveying pump |
-
2013
- 2013-01-07 CN CN201310005026.0A patent/CN103042071B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103042071A (en) | 2013-04-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103032637A (en) | Bimetal composite pipe and production method thereof | |
| CN103042071B (en) | A kind of Double-metal composite elbow and production method thereof | |
| CN202992496U (en) | Duplex metal composite elbow | |
| CN102278550B (en) | Concrete transporting pipe and manufacturing method thereof | |
| US10814382B2 (en) | Special-shaped roll formed by a composite casting method and preparation process therefore | |
| WO2012083647A1 (en) | Concrete conveying pipe and manufacturing method thereof | |
| CN103320710A (en) | High-toughness high-speed steel composite roll | |
| CN101413604B (en) | Duplex-metal abrasion-proof bent tube | |
| CN110257706A (en) | Trough of belt casting die steel welded still pipe cold roll and its processing technology | |
| CN104328334A (en) | High wear resistance high chromium cast iron used for bimetallic composite tube and preparation method thereof | |
| CN104131214B (en) | A kind of improvement wear resistant cast iron proportioning process | |
| CN104087848B (en) | A kind of compound abrasion-proof backing block | |
| CN100408189C (en) | Method for producing medium chromium tungsten-containing composite anti-wear roll ring | |
| CN106001482A (en) | Centrifugal casting bimetal abrasion resistant pipe and preparation method thereof | |
| CN104120333B (en) | Wear-resistant cast iron material, preparation method thereof and helical blade guard plate made from wear-resistant cast iron material | |
| CN203240133U (en) | Bimetal composite pipe | |
| CN208417908U (en) | A kind of concrete conveying elbow pipe | |
| CN104148609B (en) | A kind of manufacture method of die casting machine injection drift | |
| CN100382892C (en) | Method for producing high chromium tungsten-containing composite anti-wear roll ring | |
| CN101344204B (en) | Jib composite abrasion-proof elbow of concrete pump vehicle and its shaping process | |
| CN103352912B (en) | V-six engine crankshaft forging and forging method thereof | |
| CN203363437U (en) | Light abrasion-resistant concrete conveying pipe | |
| CN206746715U (en) | Wear-resisting composite liner | |
| CN2702797Y (en) | Skull-melting centrifugal casting double-metal special steel pipe | |
| CN104295804A (en) | Dual-liquid bimetal pipeline and production method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190807 Address after: 122000 No. 160, North Section of Zhongshan Avenue, Shuangta District, Chaoyang City, Liaoning Province Patentee after: Chaoyang Shuntong Wear-Resistant Technology Co., Ltd. Address before: 102402 5 South Qilidian Village, Doudian Town, Fangshan District, Beijing Patentee before: Beijing Dongxin-Shuntong Wear Resistant Technology Co., Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191126 Address after: 102400, No. 303, building 14, North East Road, good village, Fangshan District, Beijing Patentee after: Yang Hongbin Address before: 122000 No. 160, North Section of Zhongshan Avenue, Shuangta District, Chaoyang City, Liaoning Province Patentee before: Chaoyang Shuntong Wear-Resistant Technology Co., Ltd. |