CN1019902C - Wear-resistant alloy coating press roller and manufacturing method thereof - Google Patents
Wear-resistant alloy coating press roller and manufacturing method thereof Download PDFInfo
- Publication number
- CN1019902C CN1019902C CN 91100436 CN91100436A CN1019902C CN 1019902 C CN1019902 C CN 1019902C CN 91100436 CN91100436 CN 91100436 CN 91100436 A CN91100436 A CN 91100436A CN 1019902 C CN1019902 C CN 1019902C
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- Prior art keywords
- roller
- wear
- powder
- resistant alloy
- coated
- 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.)
- Expired - Fee Related
Links
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 22
- 239000000956 alloy Substances 0.000 title claims abstract description 22
- 238000000576 coating method Methods 0.000 title claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 title abstract description 9
- 239000011248 coating agent Substances 0.000 title abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000005245 sintering Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 239000008188 pellet Substances 0.000 claims abstract description 6
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 239000006071 cream Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000005275 alloying Methods 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract 3
- 238000007906 compression Methods 0.000 abstract 3
- 238000005336 cracking Methods 0.000 abstract 1
- 238000004321 preservation Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 4
- 230000004927 fusion Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 208000002697 Tooth Abrasion Diseases 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 230000002207 retinal effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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- Powder Metallurgy (AREA)
- Rolls And Other Rotary Bodies (AREA)
Abstract
The invention relates to a wear-resistant alloy coating compression roller for a pellet feed press and a manufacturing method thereof. The press roller with wear-resistant alloy coating is characterized in that the outer surface of the steel roller blank is compounded with wear-resistant alloy roller teeth consisting of Ni-02 surface hardening alloy powder and tungsten carbide powder (WC powder). The characteristic of the method is that the wear-resistant alloy powder which is prepared into paste in advance is coated on the outer surface of the steel roller blank according to the shape of the roller teeth. Then the vacuum degree of 5X 10-1X 10mmHg is adopted in a vacuum sintering furnace. A vacuum sintering process system of heat preservation for 30-45 minutes at 1050 ℃ and 1170 ℃. The compression roller manufactured by the method has high hardness, strong toughness, no cracking, long service life and low manufacturing cost, and the scrapped roller teeth can be repaired by the same method, so the compression roller is an ideal new technical product.
Description
The pressure roller that the present invention relates to a kind of vacuum sintering coating process and make with this method, specifically, the present invention relates to a kind of vacuum sintering coating process of press roller coated with wear-resisting alloy and press roller coated with wear-resisting alloy of using with a kind of pellet feed mill of this method manufacturing made.This method is also applicable to repairing the pressure roller that pellet feed mill is used.
In pellet feed mill, limited the production of pellet owing to the rapid wearing of pressing mold and pressure roller, especially pressure roller.Generally adopt straight carbon steel both at home and abroad, as No. 45 steel or tool steel, make pressure roller as the 55Cr steel, after heat treatment the hardness of roller surface roller tooth can only reach more than the HRc50 to 55.Because hardness is lower, in use roller tooth abrasion is exceedingly fast.Twenties days at most, three to five days at least, the roller tooth promptly was worn away and pressure roller is scrapped.If when further improving the hardness of pressure roller with heat treatment method, then pressure roller becomes crisp and very easily ftractures.
The object of the present invention is to provide a kind of press roller coated with wear-resisting alloy and manufacture method made from the vacuum sintering new technology thereof.This press roller coated with wear-resisting alloy is characterised in that the outer surface at the steel roller stock is compounded with the antifriction alloy roller tooth of being made up of Ni-02 surface hardening agent powder and tungsten carbide powder (WC powder), and the content of tungsten carbide powder is 16-24%, and the content of Ni-02 surface hardening agent powder is 84-76%.The vacuum sintering coating process of this manufacturing press roller coated with wear-resisting alloy is characterised in that the antifriction alloy powder that furnishing in advance is coated with cream presses the outer surface of the shape coated of roller tooth at the steel roller stock, in the vacuum sintering stove, adopt 5 * 10-1 * 10mmHg vacuum then, at 1050-1170 ℃, be incubated 30-45 minute vacuum sintering process system.Straight empty clinkering technology has multiple function, as fusion bonded forming, clinkering soldering, clinkering sealing of hole, clinkering coating and clinkering repairing etc.The present invention has just used back two kinds of functions, the present invention finishes by following technical proposals: at first the method with the conventional base pickling cleans up the steel roller stock, press table 1 proportioning, Ni-02 surface hardening agent powder and tungsten carbide powder (WC powder) are fitted in the coating powder, add bonding the reconciling into together of an amount of retinal again and be coated with cream.Being coated with the cream trowelling outer surface of clean roller stock shown in 1 in the accompanying drawings, put into baking oven behind the roller tooth of formation shown in 2, under 2000 ℃ temperature, dry, and then put in the vacuum sintering stove and carry out vacuum sintering by following technological parameter:
Vacuum 5 * 10
-2～1 * 10
-2MmHg
1050～1130 ℃ of temperature
Temperature retention time 30～45 minutes
Through after the clinkering, be coated in the roller tooth of roller stock outer surface, promptly from original coating powder state, the process fusion is condensed and is become hard alloy roller tooth, as long as suitably grasp the temperature and the temperature retention time of clinkering, just can make the press roller coated with wear-resisting alloy that between roller tooth and the roller stock necessary element counterdiffusion takes place and form the synthetic integral body of metallurgical junction.The roller teeth size is generally tooth depth 1.5～0.3mm, the facewidth 2.5～4mm.
(table 1 is seen below)
The WC powder can adopt commercially pure WC to get final product during batching, and the granularity of Ni-02 surface hardening agent powder is preferably in below 325 orders, and the chemical composition of Ni-02 surface hardening agent powder is listed in table 2.
(table 2 is seen below)
If the roller tooth of pressure roller has been worn in long use or has ground to the greatest extent, the method that can adopt vacuum sintering to repair is repaired the roller tooth.The vacuum sintering method for repairing and mending is the repetition fully of above-mentioned vacuum sintering coating process basically, and different is must trowelling whole piece roller tooth, and need only be on the basis of the remaining roller tooth in back that is worn polishing roller tooth again.
Embodiment
According to the content of foregoing invention, made that to be used in various flat-dies press roller coated with ring five groups of mould, table 3 has been enumerated material, size and the adapted pressing mold specification of five kinds of press roller coated with wear-resisting alloy.
(table 3 is seen below)
The pressure roller made from the inventive method and the advantage of this method are:
1. this pressure roller has the hardness height, and toughness is strong, and can not ftracture;
2. roller tooth hardness is very high, more than HRc60, even reaches more than the HRc65;
3. long service life, low cost of manufacture.
4. the pressure roller of having scrapped with this method reparation makes to be worn away
Table 1 coating powder proportioning
Ni-02 84～76%
Surface hardening agent powder
WC powder 16～24%
The chemical composition (weight %) of table 2 Ni-02 surface hardening agent powder
C Si B Cr Fe Ni oxygen content fusion temperature ℃
0.72/0.84 3.5/4.2 3.0/3.8 13/16≤5 surplus≤0.08 1000/1080
The specification of the size of table 3 embodiment press roller coated with wear-resisting alloy, material and adapted pressing mold
Group pressure roller diameter pressure roller material adapted pressing mold specification
(mm) roller stock roller tooth
100 No. 45 steel Ni-02 of 1 Φ 84%+WC16% Φ, 231 flat-dies
The same CPM12 of 2 Φ, 150 55Cr ", Φ 305 ring moulds
The same Φ 306 flat-dies of 180 No. 45 steel of 3 Φ
4 Φ, 206 40CrMn Ni-02 76%+WC24% CPM16 ", Φ 407 ring moulds
Mo
The same CPM20 of 5' Φ 220 40CrMn ", Φ 507 ring moulds
Mo
Roller tooth regeneration.
5. this method is easy to implement on the prior art level, and utilization this method has tangible economic benefit.
Claims (2)
1, the press roller coated with wear-resisting alloy used of a kind of pellet feed mill.It is characterized in that the outer surface at the steel roller stock is compounded with the antifriction alloy roller tooth of being made up of Ni-02 surface hardening agent powder and tungsten carbide powder (WC powder), and the content of tungsten carbide powder is 16-24%, the content of the surperficial hardening agent powder of Ni-02 is 84-76%.
2, a kind of vacuum sintering coating process of making press roller coated with wear-resisting alloy, it is characterized in that the antifriction alloy powder that furnishing in advance is coated with cream presses the outer surface of the shape coated of roller tooth at the steel roller stock, in straight empty alloying furnace, adopt 5 * 10-1 * 10mmHg vacuum then, at 1050-1170 ℃, be incubated 30-45 minute vacuum sintering process system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91100436 CN1019902C (en) | 1991-01-29 | 1991-01-29 | Wear-resistant alloy coating press roller and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91100436 CN1019902C (en) | 1991-01-29 | 1991-01-29 | Wear-resistant alloy coating press roller and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055133A CN1055133A (en) | 1991-10-09 |
| CN1019902C true CN1019902C (en) | 1993-02-17 |
Family
ID=4904630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91100436 Expired - Fee Related CN1019902C (en) | 1991-01-29 | 1991-01-29 | Wear-resistant alloy coating press roller and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1019902C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2740553A1 (en) | 2012-12-07 | 2014-06-11 | Sandvik Intellectual Property AB | Method for manufacture of HIP consolidated component |
-
1991
- 1991-01-29 CN CN 91100436 patent/CN1019902C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055133A (en) | 1991-10-09 |
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