CN103111798A - R4 mooring chain end ring flash-welding process - Google Patents
R4 mooring chain end ring flash-welding process Download PDFInfo
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- CN103111798A CN103111798A CN 201110365415 CN201110365415A CN103111798A CN 103111798 A CN103111798 A CN 103111798A CN 201110365415 CN201110365415 CN 201110365415 CN 201110365415 A CN201110365415 A CN 201110365415A CN 103111798 A CN103111798 A CN 103111798A
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- end ring
- chain end
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- mooring chain
- welding process
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Abstract
A type of R4 mooring chain end ring flash-welding process includes the steps of clamping, preheating, flashing, upset forging and cooling. The R4 mooring chain end ring flash-welding process ensures that the welding performance of an R4 mooring chain end ring with the diameter of 50 millimeters meets the requirements of classification society rules.
Description
Technical field:
The present invention relates to a kind of marine mooring chain, relate in particular to a kind of Flash Butt Welding technique of Φ 50mmR4 mooring cable end-rings.
Background technology:
Marine mooring chain is widely used in the large ocean engineering structure, is the chain that guarantees the life used safely under abominable open ocean.At present, the R4 level mooring cable that is used on deep sea drilling platform is to use the most general marine mooring chain in the world today, and it has the technical characterictic of high strength, obdurability, corrosion-resistant and antifatigue.According to the requirement of classification society rule, R4 level mooring cable has very large elevated temperature strength, its tensile strength 〉=860MPa, yield strength 〉=580MPa, weld bond impact value 〉=36J after should having higher intensity and toughness and material heating.Because R4 level mooring cable has higher intensity and alloying element, therefore in the technological design of Flash Butt Welding or when carrying out technique, if welding procedure is slightly variant, just very large on the impact of R4 level mooring cable performance.
Summary of the invention:
The purpose of this invention is to provide and a kind ofly guarantee that the chain link welding performance satisfies the Flash Butt Welding technique of the Φ 50mm R4 level mooring cable end-rings that classification society requires.
The object of the present invention is achieved like this, and a kind of Flash Butt Welding technique of R4 mooring cable end-rings is characterized in that comprising the following steps: clamping, and------flash of light---upset---is cooling in preheating.
Flash Butt Welding parameter of the present invention is: the amount of burning: 11mm, and the top is long: 9mm, burn speed: 2.1mm/s, secondary idle load voltage: 11.2V.
The present invention has guaranteed that the welding performance of Φ 50mm R4 level mooring cable end-rings meets the requirement of classification society rule.
The specific embodiment:
A kind of Flash Butt Welding technique of R4 mooring cable end-rings is characterized in that comprising the following steps: clamping, and------flash of light---upset---is cooling in preheating.The Flash Butt Welding parameter is: the amount of burning: 11mm, and the top is long: 9mm, burn speed: 2.1mm/s, secondary idle load voltage: 11.2V.during concrete enforcement, the Flash Butt Welding parameter of R4 mooring cable end-rings (diameter is Φ 60): when the choosing of the amount of the burning process that must guarantee to burn finishes, can guarantee homogeneous heating on two end faces of weldment, produce enough molten metal layer, reach simultaneously plastic deformation temperatures on certain depth, could obtain like this joint of high-quality in upset, the R4 mooring chain steel contains more Mo element, these elements can significantly improve the elevated temperature strength of material, but can produce enough plastic deformations when guaranteeing upset, need suitably to increase the amount of burning, and prolongation is burnt the time.When the upset amount that is chosen at of upset amount is less, having liquid metal remains in interface, easily form loose, shrinkage cavity, crackle, cast sturcture, greyness, oxide inclusion, the defective such as lack of penetration, joint mechanical property is reduced, thereby the impact value that obtains is lower; The meeting bigger than normal of upset amount squeezes out too much plastic metal, increase to remove the difficulty of joint burr, also can because of the joint part tear and crystallized seriously crooked, reduce the impact toughness of joint.Can the relation of choosing of speed of welding the Flash Butt Welding process and be carried out smoothly, only chosen the strong and stable of suitable speed of welding guarantee flash of light, and obtained best heating effect.The thermal efficiency when selection of secondary idle load voltage can have influence on output power of power supply and welding, by test as can be known, in the time of the secondary idle load brownout, glisten unstable, the weldment short circuit easily occurs and end the flash of light, the secondary idle load overtension, can stay darker fiery pit on end face, and can't seal fully during upset, easily produce the defectives such as slag inclusion, shrinkage cavity, affect joint quality.
Claims (2)
1. the Flash Butt Welding technique of a R4 mooring cable end-rings is characterized in that comprising the following steps: clamping, and------flash of light---upset---is cooling in preheating.
2. the Flash Butt Welding technique of a kind of R4 mooring cable end-rings according to claim 1, it is characterized in that: the Flash Butt Welding parameter is: the amount of burning: 11mm, the top is long: 9mm, burn speed: 2.1mm/s, secondary idle load voltage: 11.2V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110365415 CN103111798A (en) | 2011-11-17 | 2011-11-17 | R4 mooring chain end ring flash-welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110365415 CN103111798A (en) | 2011-11-17 | 2011-11-17 | R4 mooring chain end ring flash-welding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103111798A true CN103111798A (en) | 2013-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110365415 Pending CN103111798A (en) | 2011-11-17 | 2011-11-17 | R4 mooring chain end ring flash-welding process |
Country Status (1)
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| CN (1) | CN103111798A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304458A (en) * | 2016-04-21 | 2017-10-31 | 北大方正集团有限公司 | A kind of hot-rolled steel and its manufacture method, mooring cable and its manufacture method |
-
2011
- 2011-11-17 CN CN 201110365415 patent/CN103111798A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107304458A (en) * | 2016-04-21 | 2017-10-31 | 北大方正集团有限公司 | A kind of hot-rolled steel and its manufacture method, mooring cable and its manufacture method |
| CN107304458B (en) * | 2016-04-21 | 2019-06-25 | 北大方正集团有限公司 | A kind of hot-rolled steel and its manufacturing method, mooring cable and its manufacturing method |
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| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130522 |