CN107654306A - A kind of high occlusal pattern cylinder sleeve and preparation method thereof - Google Patents
A kind of high occlusal pattern cylinder sleeve and preparation method thereof Download PDFInfo
- Publication number
- CN107654306A CN107654306A CN201710613223.9A CN201710613223A CN107654306A CN 107654306 A CN107654306 A CN 107654306A CN 201710613223 A CN201710613223 A CN 201710613223A CN 107654306 A CN107654306 A CN 107654306A
- Authority
- CN
- China
- Prior art keywords
- cylinder sleeve
- depth
- blank
- annular trough
- contents
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/004—Cylinder liners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/003—Alloys based on aluminium containing at least 2.6% of one or more of the elements: tin, lead, antimony, bismuth, cadmium, and titanium
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The present invention discloses a kind of high occlusal pattern cylinder sleeve, including liner body, and the liner body inner surface is coated with undercoating, and the internally coated surface roughness is at 80 ~ 120 μm, and thickness is in 0.2 ~ 0.4mm；The both ends of the outer surface of the liner body offer annular trough body, and the depth of the annular trough body is 0.1 ~ 0.4mm；Set in the intermediate region of the outer surface of the liner body jagged；The burr height is in 0.1 ~ 0.5mm.Invention additionally discloses the method for preparing above-mentioned high occlusal pattern cylinder sleeve.The present invention has that snap-in force is good, the technique effect of service life length.
Description
Technical field
The present invention relates to cylinder sleeve production field, more particularly to a kind of high occlusal pattern cylinder sleeve and preparation method thereof.
Background technology
Automobile engine be it is a kind of can be the heart of automobile the machine that can be converted into mechanical energy of other forms, shadow
Ring dynamic property, economy and the feature of environmental protection of automobile.Cylinder sleeve is engine A levels key zero as one of main fittings of engine
Part, its performance directly affect the technical requirements such as the dynamic property of engine, reliability, economy, discharge, noise.
At present, traditional cylinder sleeve production cost is higher, and running-in time length, snap-in force is poor, and service life is short, and is difficult to meet
Requirement of the high-performance energy saving environment protection engine for cylinder sleeve intensity and wearability and cost.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides snap-in force is good, the high occlusal pattern cylinder sleeve and its system of service life length
Preparation Method.
The present invention realizes solve above-mentioned technical problem by following technological means：A kind of high occlusal pattern cylinder sleeve, including cylinder
Body is covered, the liner body inner surface is coated with undercoating, and at 80 ~ 120 μm, thickness exists the internally coated surface roughness
0.2~0.4mm；The both ends of the outer surface of the liner body offer annular trough body, the depth of the annular trough body for 0.1 ~
0.4mm；Set in the intermediate region of the outer surface of the liner body jagged；The burr height is in 0.1 ~ 0.5mm.
Preferably：The annular trough body is in ledge structure, including first annular cell body, the second annular trough body；Described second
The depth of annular trough body is more than the depth of the first annular cell body.
Preferably：The depth of the first annular cell body is 0.1 ~ 0.2mm；The depth of the first annular cell body be 0.2 ~
0.3mm。
Preferably：It is 5 ~ 6wt.%, Ti that the chemical composition of the liner body is counted including Si contents as following weight percent
Content is 7 ~ 8wt.%, and Fe contents are 0.3 ~ 0.4wt.%, and Mn contents are 0.6 ~ 0.8wt.%, and Pd contents are 0.05 ~ 0.07wt.%,
Sr contents are 2.3 ~ 2.6wt.%, and remaining is Al.
A kind of method for preparing above-mentioned high occlusal pattern cylinder sleeve, comprises the following steps：
Step 1：Cast raw material is melt into after liquid material is cast into mould, using centrifugal casting into crude green body, centrifugal casting
Cheng Zhong, rotating speed are 3000 ~ 3500rpm, and pouring temperature is 850 ~ 880 DEG C, and mold preheating temperature is 200 ~ 350 DEG C；Then to thick
Base carries out turning preliminary working into blank；
Step 2：Coating is sprayed on blank inner surface, formation has internally coated blank, wherein, internally coated roughness exists
80 ~ 120 μm, thickness is in 0.2 ~ 0.4mm；
Step 3：Both ends car annular trough body in blank outer surface, the groove depth of annular trough body is in 0.1 ~ 0.4mm；
Step 4：Upper rotary spraying ceramic material in blank outer surface forms burr portion, the burr height in burr portion 0.1 ~
0.5mm。
Preferably, after coating is sprayed blank inner surface form undercoating, the inner surface memory honing to blank.
The advantage of the invention is that：
（1）Undercoating is attached to liner body inner surface, has higher hardness, can shorten the running-in time of cylinder sleeve, extends
The service life of cylinder sleeve.Undercoating thickness is in 0.2 ~ 0.5mm, it is possible to increase the bond strength with liner body, and possess foot
Enough anti-wear performances.
（2）The annular groove that liner body is provided with can make cylinder sleeve be combined closely with cylinder body, and lift radial direction ability to bear,
Prevent from departing from cylinder body during work.
（3）Burr on liner body helps to lift the snap-in force between cylinder sleeve and cylinder body, and has preferable corrosion resistant
Erosion and anti-wear performance, while the bond strength with cylinder sleeve is ensured, help to obtain effective pyroconductivity.
（4）Burr portion and cell body are separate, easy to process, and manufacturing cost is low.
Further, by optimizing the composition of aluminium alloy, and cylinder sleeve is made by the way of centrifugal casting so that cylinder sleeve and cylinder
Hard-packed metallurgical binding is easily formed between body, the adhesion between cylinder sleeve, cylinder body significantly improves.
Further, annular trough body uses hierarchic structure, improves the contact area between cylinder sleeve and cylinder body, contacts complexity,
Radial direction ability to bear can be further lifted, prevents from departing from cylinder body during work.
Brief description of the drawings
Fig. 1 is the stereogram of the high occlusal pattern cylinder sleeve of the present invention.
Fig. 2 is topology example figure of the high occlusal pattern cylinder sleeve of the present invention under vertical view state.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Embodiment 1
As shown in Figure 1-2, the present embodiment discloses a kind of high occlusal pattern cylinder sleeve, including liner body, the coating of liner body inner surface
There is undercoating 1, the surface roughness of undercoating 1 is at 80 μm, and thickness is in 0.2mm；The both ends of the outer surface of liner body open up
There is annular trough body 2, the depth of annular trough body 2 is 0.1mm；In the intermediate region of the outer surface of liner body, jagged 3 knot is set
Structure；The height of burr 3 is in 0.1m.
It is 5wt.% that the chemical composition of liner body is counted including Si contents as following weight percent, and Ti contents are 7wt.%,
Fe contents are 0.3wt.%, and Mn contents are 0.6wt.%, and Pd contents are 0.05wt.%, and Sr contents are 2.3wt.%, and remaining is Al.
Embodiment 2
As shown in Figure 1-2, the present embodiment discloses a kind of high occlusal pattern cylinder sleeve, including liner body, the coating of liner body inner surface
There is undercoating 1, the surface roughness of undercoating 1 is at 100 μm, and thickness is in 0.3mm；The both ends of the outer surface of liner body open up
There is annular trough body 2, the depth of annular trough body 2 is 0.3mm；In the intermediate region of the outer surface of liner body, jagged 3 knot is set
Structure；The height of burr 3 is in 0.2mm.
Annular trough body 2 is in ledge structure, including first annular cell body 21, the second annular trough body 22；Second annular trough body 22
Depth be more than first annular cell body 21 depth.
The depth of first annular cell body 21 is 0.1mm；The depth of first annular cell body 21 is 0.2mm.
It is 5wt.% that the chemical composition of liner body is counted including Si contents as following weight percent, Ti contents are 7 ~
8wt.%, Fe content are 0.35wt.%, and Mn contents are 0.7wt.%, and Pd contents are 0.06wt.%, and Sr contents are 2.5wt.%, remaining
For Al.
Embodiment 3
As shown in Figure 1-2, the present embodiment discloses a kind of high occlusal pattern cylinder sleeve, including liner body, the coating of liner body inner surface
There is undercoating 1, the surface roughness of undercoating 1 is at 120 μm, and thickness is in 0.4mm；The both ends of the outer surface of liner body open up
There is annular trough body 2, the depth of annular trough body 2 is 0.4mm；In the intermediate region of the outer surface of liner body, jagged 3 knot is set
Structure；The height of burr 3 is in 0.5mm.
Annular trough body 2 is in ledge structure, including first annular cell body 21, the second annular trough body 22；Second annular trough body 22
Depth be more than first annular cell body 21 depth.
The depth of first annular cell body 21 is 0.15mm；The depth of first annular cell body 21 is 0.25mm.
It is 6wt.% that the chemical composition of liner body is counted including Si contents as following weight percent, and Ti contents are 8wt.%,
Fe contents are 0.4wt.%, and Mn contents are 0.8wt.%, and Pd contents are 0.07wt.%, and Sr contents are 2.6wt.%, and remaining is Al.
Due to the cylinder sleeve of the present invention, its undercoating is attached to liner body inner surface, has higher hardness, can shorten
The running-in time of cylinder sleeve, extend the service life of cylinder sleeve.Undercoating thickness is in 0.2 ~ 0.5mm, it is possible to increase with liner body
Bond strength, and possess enough anti-wear performances.
The annular groove that liner body is provided with can make cylinder sleeve be combined closely with cylinder body, and lift radial direction ability to bear, prevent
Depart from cylinder body when only working.
Burr on liner body helps to be lifted the snap-in force between cylinder sleeve and cylinder body, and with it is preferably corrosion-resistant with
Anti-wear performance, while the bond strength with cylinder sleeve is ensured, help to obtain effective pyroconductivity.
Burr portion and cell body are separate, easy to process, and manufacturing cost is low.
Further, by optimizing the composition of aluminium alloy, and cylinder sleeve is made by the way of centrifugal casting so that cylinder sleeve and cylinder
Hard-packed metallurgical binding is easily formed between body, the adhesion between cylinder sleeve, cylinder body significantly improves.
Further, annular trough body uses hierarchic structure, improves the contact area between cylinder sleeve and cylinder body, contacts complexity,
Radial direction ability to bear can be further lifted, prevents from departing from cylinder body during work.
Embodiment 4
The present embodiment discloses a kind of method for the high occlusal pattern cylinder sleeve for preparing above-mentioned each embodiment, comprises the following steps：
Step 1：Cast raw material is melt into after liquid material is cast into mould, using centrifugal casting into crude green body, centrifugal casting
Cheng Zhong, rotating speed are 3000 ~ 3500rpm, and pouring temperature is 850 ~ 880 DEG C, and mold preheating temperature is 200 ~ 350 DEG C；Then to thick
Base carries out turning preliminary working into blank；
Step 2：Coating is sprayed on blank inner surface, formation has internally coated blank, wherein, the roughness of undercoating 1 exists
80 ~ 120 μm, thickness is in 0.2 ~ 0.4mm；
Step 3：Both ends car annular trough body in blank outer surface, the groove depth of annular trough body is in 0.1 ~ 0.4mm；
Step 4：Upper rotary spraying ceramic material in blank outer surface forms burr portion, the burr height that burr is 3 0.1 ~
0.5mm。
Preferably, after coating is sprayed blank inner surface form undercoating, the inner surface memory honing to blank.
It should be noted that herein, if being used merely in the presence of first and second or the like relational terms by one
Individual entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operate it
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Cover including for nonexcludability, so that process, method, article or equipment including a series of elements not only include those
Key element, but also the other element including being not expressly set out, or also include for this process, method, article or set
Standby intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Other identical element in the process including the key element, method, article or equipment also be present.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although with reference to the foregoing embodiments
The present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each implementation
Technical scheme described in example is modified, or carries out equivalent substitution to which part technical characteristic；And these modification or
Replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (6)
1. a kind of high occlusal pattern cylinder sleeve, including liner body, the liner body inner surface are coated with undercoating, the undercoating
Surface roughness at 80 ~ 120 μm, thickness is in 0.2 ~ 0.4mm；It is characterized in that：The both ends of the outer surface of the liner body
Annular trough body is offered, the depth of the annular trough body is 0.1 ~ 0.4mm；In the middle area of the outer surface of the liner body
Domain sets jagged；The burr height is in 0.1 ~ 0.5mm.
2. high occlusal pattern cylinder sleeve according to claim 1, it is characterised in that：The annular trough body is in ledge structure, including
First annular cell body, the second annular trough body；The depth of second annular trough body is more than the depth of the first annular cell body.
3. high occlusal pattern cylinder sleeve according to claim 2, it is characterised in that：The depth of the first annular cell body be 0.1 ~
0.2mm；The depth of the first annular cell body is 0.2 ~ 0.3mm.
4. high occlusal pattern cylinder sleeve according to claim 2, it is characterised in that：The chemical composition of the liner body is by as follows
Percentage by weight meter is 5 ~ 6wt.% including Si contents, and Ti contents are 7 ~ 8wt.%, and Fe contents are 0.3 ~ 0.4wt.%, and Mn contents are
0.6 ~ 0.8wt.%, Pd content are 0.05 ~ 0.07wt.%, and Sr contents are 2.3 ~ 2.6wt.%, and remaining is Al.
A kind of 5. method for preparing the high occlusal pattern cylinder sleeve as described in claim any one of 1-4, it is characterised in that including as follows
Step：
Step 1：Cast raw material is melt into after liquid material is cast into mould, using centrifugal casting into crude green body, centrifugal casting
Cheng Zhong, rotating speed are 3000 ~ 3500rpm, and pouring temperature is 850 ~ 880 DEG C, and mold preheating temperature is 200 ~ 350 DEG C；Then to thick
Base carries out turning preliminary working into blank；
Step 2：Coating is sprayed on blank inner surface, formation has internally coated blank, wherein, internally coated roughness exists
80 ~ 120 μm, thickness is in 0.2 ~ 0.4mm；
Step 3：Both ends car annular trough body in blank outer surface, the groove depth of annular trough body is in 0.1 ~ 0.4mm；
Step 4：Upper rotary spraying ceramic material in blank outer surface forms burr portion, the burr height in burr portion 0.1 ~
0.5mm。
6. the method for the high occlusal pattern cylinder sleeve according to right will go 5, it is characterised in that coating is being sprayed into blank inner surface
After forming undercoating, the inner surface memory honing to blank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613223.9A CN107654306A (en) | 2017-07-25 | 2017-07-25 | A kind of high occlusal pattern cylinder sleeve and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710613223.9A CN107654306A (en) | 2017-07-25 | 2017-07-25 | A kind of high occlusal pattern cylinder sleeve and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107654306A true CN107654306A (en) | 2018-02-02 |
Family
ID=61127856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710613223.9A Pending CN107654306A (en) | 2017-07-25 | 2017-07-25 | A kind of high occlusal pattern cylinder sleeve and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107654306A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005540A (en) * | 2019-05-09 | 2019-07-12 | 安庆帝伯格茨缸套有限公司 | A kind of as cast condition composite coating cylinder sleeve and preparation method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB954903A (en) * | 1959-05-25 | 1964-04-08 | English Electric Co Ltd | Improvements in or relating to internal combustion engines |
| JPS5985866A (en) * | 1982-11-08 | 1984-05-17 | Mitsubishi Heavy Ind Ltd | Melt spraying method of ceramic |
| CN2576980Y (en) * | 2002-10-29 | 2003-10-01 | 河南省中原内配股份有限公司 | Cylinder jacket with uniform-distruting burrs of outer diameter |
| CN102278225A (en) * | 2011-07-11 | 2011-12-14 | 南京航空航天大学 | Low-friction axial unequal-angle platform honing cylinder jacket |
| CN102588136A (en) * | 2012-03-12 | 2012-07-18 | 重庆大学 | Wear-resistant aluminium alloy cylinder sleeve and preparation method thereof |
| CN104653323A (en) * | 2015-02-10 | 2015-05-27 | 河南省中原内配股份有限公司 | Car air cylinder sleeve and preparation method thereof |
| CN106270370A (en) * | 2016-08-10 | 2017-01-04 | 中原内配集团股份有限公司 | A kind of needle prick shape cylinder jacket and preparation method thereof |
| CN106499539A (en) * | 2016-10-31 | 2017-03-15 | 中原内配集团股份有限公司 | A kind of low friction undercoating cylinder jacket and preparation method thereof |
| CN206274019U (en) * | 2016-08-16 | 2017-06-23 | 江苏江宇动力机械有限公司 | Low cost high powered improved diesel engine cylinder |
-
2017
- 2017-07-25 CN CN201710613223.9A patent/CN107654306A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB954903A (en) * | 1959-05-25 | 1964-04-08 | English Electric Co Ltd | Improvements in or relating to internal combustion engines |
| JPS5985866A (en) * | 1982-11-08 | 1984-05-17 | Mitsubishi Heavy Ind Ltd | Melt spraying method of ceramic |
| CN2576980Y (en) * | 2002-10-29 | 2003-10-01 | 河南省中原内配股份有限公司 | Cylinder jacket with uniform-distruting burrs of outer diameter |
| CN102278225A (en) * | 2011-07-11 | 2011-12-14 | 南京航空航天大学 | Low-friction axial unequal-angle platform honing cylinder jacket |
| CN102588136A (en) * | 2012-03-12 | 2012-07-18 | 重庆大学 | Wear-resistant aluminium alloy cylinder sleeve and preparation method thereof |
| CN104653323A (en) * | 2015-02-10 | 2015-05-27 | 河南省中原内配股份有限公司 | Car air cylinder sleeve and preparation method thereof |
| CN106270370A (en) * | 2016-08-10 | 2017-01-04 | 中原内配集团股份有限公司 | A kind of needle prick shape cylinder jacket and preparation method thereof |
| CN206274019U (en) * | 2016-08-16 | 2017-06-23 | 江苏江宇动力机械有限公司 | Low cost high powered improved diesel engine cylinder |
| CN106499539A (en) * | 2016-10-31 | 2017-03-15 | 中原内配集团股份有限公司 | A kind of low friction undercoating cylinder jacket and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110005540A (en) * | 2019-05-09 | 2019-07-12 | 安庆帝伯格茨缸套有限公司 | A kind of as cast condition composite coating cylinder sleeve and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107619990B (en) | A kind of preparation method of the Cast iron liner based on coating on inner surface | |
| CN105618679A (en) | Preparation method for automobile charging turbine | |
| CN105618676A (en) | Environment-friendly preparation method for automobile engine shell | |
| CN105506377A (en) | Environment-friendly type manufacturing method for car supercharging turbine | |
| CN110465622A (en) | Wind-driven generator S. G. Cast Iron Wheel Hub foundry facing and preparation method and application | |
| CN110814672A (en) | Preparation process of novel bimetal composite integrated brake drum | |
| CN102618870A (en) | Wear-resistant and abrasion-resistant mould and preparation process for forming protective coating on working surface of mould substrate | |
| CN107654306A (en) | A kind of high occlusal pattern cylinder sleeve and preparation method thereof | |
| CN107587003A (en) | A kind of helical form burr type aluminium alloy cylinder sleeve and preparation method thereof | |
| CN101503010B (en) | Steel ring wear-resistant casting parts and method for producing the same | |
| CN104889036B (en) | Refined aluminium is purified with iron-based crucible protection composite coating | |
| CN105834399B (en) | A kind of composite low-pressure casting stalk and preparation method thereof | |
| CN101912948B (en) | Method for manufacturing corrosion-resistant double-metal pipe by expendable pattern shell molding process | |
| CN107460377A (en) | A kind of aluminum alloy cylinder sleeve and preparation method thereof | |
| CN2195396Y (en) | Intergral lining casting ladle | |
| CN108655342A (en) | A kind of preparation facilities and preparation method of environmental protection founding materials | |
| CN210280646U (en) | High-temperature ladle heat preservation system | |
| CN210547873U (en) | Wear-resisting iron mold sand-lined mold that casts ball | |
| CN1968772B (en) | Slide plate and its production method | |
| CN214146563U (en) | Cylinder sleeve structure cast with rough surface | |
| CN101701602A (en) | Flange shaft sleeve and manufacturing method thereof | |
| CN108637236A (en) | A kind of long nozzle sealing ring | |
| CN206215890U (en) | A kind of sprue bush of H13 mould steel and Ceramic Composite | |
| CN111719077B (en) | Ultra-low carbon and low silicon bainite matrix gray cast iron cylinder sleeve and preparation method thereof | |
| CN209664290U (en) | A kind of Novel free preheating composite construction long nozzle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180202 |