CN104668717A - Novel steel rail welding method - Google Patents
Novel steel rail welding method Download PDFInfo
- Publication number
- CN104668717A CN104668717A CN201310614251.4A CN201310614251A CN104668717A CN 104668717 A CN104668717 A CN 104668717A CN 201310614251 A CN201310614251 A CN 201310614251A CN 104668717 A CN104668717 A CN 104668717A
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- CN
- China
- Prior art keywords
- welding
- steel rail
- temperature
- rail
- welding method
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/0026—Arc welding or cutting specially adapted for particular articles or work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/26—Railway- or like rails
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a novel steel rail welding method. The novel steel rail welding method comprises the following steps: (1) selecting a welding strip for welding a high carbon and high manganese steel rail; (2) regulating an assembly gap of the steel rail to 15-25 mm, fixing the steel rail with an arched horse, and fitting a copper lining pad on the bottom of the steel rail; (3) adopting a single-surface welding method for manual electric-arc welding copper lining pad; (4) setting a welding position for butt-jointing right-angled slope openings; (5) setting temperature measuring points on positions 100 mm from the center of the welding seam, wherein the preheating temperature is not lower than 300 DEG C, the interlayer temperature is not lower than 200 DEG C, the heating temperature after welding is not lower than 600 DEG C; slowly cooling by preserving the temperature; (6) operating according to the welding operation specifications. The welding process disclosed by the invention performs 100% magnetic powder flaw-detection checking after welding, wherein defects of welding cracks and the like are not found in the welding seam and a heat interference region.
Description
Technical field
The present invention relates to metal solder field, particularly a kind of Novel steel rail welding method.
Background technology
Rail and gantry crane girder being combined when designing, jointly take part in the calculating of girder longitudinal strength as composite entity, namely rail requires that will bear the same with girder stretches and bending stress.In this case, the banjo fixing butt jointing of designing requirement rail must be strong with mother metal maintenance etc., and require that postwelding face of weld hardness should a little more than rail matrix.Due in this kind of situation, the cross sectional shape of rail is special, adopts common welding method to be difficult to the weld seam requirement reaching high-quality.
Summary of the invention
Technical problem to be solved by this invention prevents weld crack, guarantees that the strong and case hardness such as welding point and mother metal is higher than mother metal simultaneously, and be applicable to the technical problem of welding operation method of manual welding of special cross-section shape.
Technical scheme of the present invention is:
A kind of Novel steel rail welding method, is characterized in that: comprise the following steps:
(1) Welding electrode for high manganese carbon steel rail is selected;
(2) 10-20 mm is adjusted in rail fit-up gap, fix with arcuate horse, flange of rail portion is equipped with copper packing lining;
(3) welding method of manual electric arc welding copper lining single welding is adopted;
(4) welding position: the flat docking of right angle groove;
(5) point for measuring temperature is all at distance Weld pipe mill 100mm place; Preheat temperature >=320 DEG C, interlayer temperature >=220 DEG C, post-weld heating temperature >=600 DEG C, are then incubated slow cooling;
(6) by welding operation standard operation.
Above-mentioned welding operation specification is: backing welding Φ 3.2mm welding rod, and welding current is 110 ~ 120A, and all the other each layers all use Φ 4mm welding rod, and welding current is 160 ~ 170A; During welding, every layer is first welded the left and right sides symmetrically, and then welding bead in the middle of weldering; Often weld and change welding direction together, middle welding bead adopts hammering to reduce welding stress, often welds 2 ~ 3 layers and draws arc-extinguishing plate according to rail section change setting.
The advantage that the present invention compared with prior art has:
Adopt welding method of the present invention, the welding point hot strength of welding A120 heavy rail and the result of the test of case hardness as follows:
detailed description of the invention:
A kind of Novel steel rail welding method, comprises the following steps:
(1) Welding electrode for high manganese carbon steel rail is selected;
(2) 10-20 mm is adjusted in rail fit-up gap, fix with arcuate horse, flange of rail portion is equipped with copper packing lining;
(3) welding method of manual electric arc welding copper lining single welding is adopted;
(4) welding position: the flat docking of right angle groove;
(5) point for measuring temperature is all at distance Weld pipe mill 100mm place; Preheat temperature >=320 DEG C, interlayer temperature >=220 DEG C, post-weld heating temperature >=600 DEG C, are then incubated slow cooling;
(6) by welding operation standard operation.
Above-mentioned welding operation specification is: backing welding Φ 3.2mm welding rod, and welding current is 110 ~ 120A, and all the other each layers all use Φ 4mm welding rod, and welding current is 160 ~ 170A; During welding, every layer is first welded the left and right sides symmetrically, and then welding bead in the middle of weldering; Often weld and change welding direction together, middle welding bead adopts hammering to reduce welding stress, often welds 2 ~ 3 layers and draws arc-extinguishing plate according to rail section change setting.
Claims (1)
1. a Novel steel rail welding method, is characterized in that: comprise the following steps:
(1) Welding electrode for high manganese carbon steel rail is selected;
(2) 10-20 mm is adjusted in rail fit-up gap, fix with arcuate horse, flange of rail portion is equipped with copper packing lining;
(3) welding method of manual electric arc welding copper lining single welding is adopted;
(4) welding position: the flat docking of right angle groove;
(5) point for measuring temperature is all at distance Weld pipe mill 100mm place; Preheat temperature >=320 DEG C, interlayer temperature >=220 DEG C, post-weld heating temperature >=600 DEG C, are then incubated slow cooling;
(6) by welding operation standard operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310614251.4A CN104668717A (en) | 2013-11-28 | 2013-11-28 | Novel steel rail welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310614251.4A CN104668717A (en) | 2013-11-28 | 2013-11-28 | Novel steel rail welding method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104668717A true CN104668717A (en) | 2015-06-03 |
Family
ID=53304587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310614251.4A Pending CN104668717A (en) | 2013-11-28 | 2013-11-28 | Novel steel rail welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104668717A (en) |
-
2013
- 2013-11-28 CN CN201310614251.4A patent/CN104668717A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |