CN1025946C - Method for built-up welding of hot shearing cutter of small billet continuous casting machine - Google Patents
Method for built-up welding of hot shearing cutter of small billet continuous casting machine Download PDFInfo
- Publication number
- CN1025946C CN1025946C CN 91110471 CN91110471A CN1025946C CN 1025946 C CN1025946 C CN 1025946C CN 91110471 CN91110471 CN 91110471 CN 91110471 A CN91110471 A CN 91110471A CN 1025946 C CN1025946 C CN 1025946C
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- China
- Prior art keywords
- welding
- hot shearing
- repair
- continuous casting
- shearing edges
- 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
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- Metal Rolling (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention relates to a repair welding method for hot shearing edges of small square billet continuous casting machines in steel making plants. After the hot shearing edges of small square billet continuous casting machines, which are made of 5CrW2Si in China, are discarded, welding sticks made of cobalt-base alloy and a technique skill method that is suitable for the material of the welding sticks and the hot shearing edges are used for repair-welding and repairing the hot shearing edges, and the service life of the hot shearing edges is from 2 to 2.5 times of that of original new hot shearing edges; in addition, one hot shearing edge can be repair-welded for many times and can be repeatedly used. Accordingly, the consumption of spare parts is reduced, and the fund of spare parts is saved.
Description
The present invention relates to the repair method of steelworks water billet caster hot-shear blade.
Billet caster is one of visual plant of steel-making continuous casting production, and hot-shear blade is a part on the billet caster, this part that domestic manufacturing is used, and material mostly is 5CrW
2Si.At present, hot-shear blade in the production use, be worn can not use after, just still changed newly, cause the mass consumption of spare part and fund, also do not repair again the way of usefulness so far.
Purpose of the present invention is exactly the billet caster hot-shear blade of scrapping wearing and tearing, by repair method reparation usefulness again, reaches the result of use that is not less than new parts.
The present invention is achieved in that and adopts the cobalt base alloy welding rod that components of welding electrode (deposited metal composition) and weight percent are
C Cr W Co Ni Fe
1.0-1.7 26-32 7.0-9.5 base≤3.0＜3.0
The weldering before with cutting edge with 50 ℃/time speed be heated to 350 ℃, constant temperature 1 hour spreads one deck borax on cutting edge; After the repair welding with 100 ℃/time speed cutting edge is heated to 300 ℃.Slow cooling is to room temperature routinely then, and through the emery wheel corase grind, grinding machine is processed into desired size and precision.
In order to realize technical scheme of the present invention, welding rod to be toasted 2 hours under 180-220 ℃ temperature before the weldering, the welding process DC welder, use antipole, manual arc, welding position are downhand welding, and welding condition are: when electrode diameter is 4.0mm, weldingvoltage is 25-30V, and welding current is 100-120A; When electrode diameter was 5.0mm, welding rod voltage was 25-30V, and welding current is 115-130A.
The hardness value of the new part of billet caster hot-shear blade is HRC45-50, adopts the hardness value after the hot-shear blade Welding Repair that repair method of the present invention scraps wearing and tearing to reach HRC52-54.On Handan Iron ﹠ Steel Factory-steel-making subsidiary factory billet caster, repeatedly use the hot-shear blade of repair welding, obtain very good effect.Under the situation of same shear-steel amount, be 2-2.5 times of former new cutting edge its duration of service, and a hot-shear blade can be through three repair weldings, repeatedly use, thereby greatly reduce spare parts consumption, and saved fund, economic benefit is very remarkable.
Claims (1)
1, a kind of material is 5CrW
2The repair method of the billet caster hot-shear blade of Si is characterized in that adopting the cobalt base alloy welding rod, and components of welding electrode (deposited metal composition) and weight percent content are:
C?Cr?W?Co?Ni?Fe
1.0-1.7 26-32 7.0-9.5 base≤3.0＜3.0
The weldering before with cutting edge with 50 ℃/time speed be heated to 350 ℃, constant temperature 1 hour spreads one deck borax on cutting edge; After the repair welding with 100 ℃/time speed cutting edge is heated to 300 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91110471 CN1025946C (en) | 1991-10-29 | 1991-10-29 | Method for built-up welding of hot shearing cutter of small billet continuous casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91110471 CN1025946C (en) | 1991-10-29 | 1991-10-29 | Method for built-up welding of hot shearing cutter of small billet continuous casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1071871A CN1071871A (en) | 1993-05-12 |
| CN1025946C true CN1025946C (en) | 1994-09-21 |
Family
ID=4910113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91110471 Expired - Fee Related CN1025946C (en) | 1991-10-29 | 1991-10-29 | Method for built-up welding of hot shearing cutter of small billet continuous casting machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1025946C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102658417B (en) * | 2012-03-12 | 2014-08-13 | 天津重钢机械装备股份有限公司 | Welding repair technology of casting defect of high-chromium cast iron |
-
1991
- 1991-10-29 CN CN 91110471 patent/CN1025946C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1071871A (en) | 1993-05-12 |
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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 | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |