CN103846531A - Welding method of low-alloy high-strength steel - Google Patents
Welding method of low-alloy high-strength steel Download PDFInfo
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- CN103846531A CN103846531A CN201210520594.XA CN201210520594A CN103846531A CN 103846531 A CN103846531 A CN 103846531A CN 201210520594 A CN201210520594 A CN 201210520594A CN 103846531 A CN103846531 A CN 103846531A
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- welding
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Classifications
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- 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
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
-
- 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
- B23K9/235—Preliminary treatment
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a welding method of low-alloy high-strength steel, which comprises the following steps of step 1 of pre-welding preparation: drying a welding rod before use,, and insulating for 1-2 hours, wherein the drying temperature is 300-350 DEG C; step 2 of beveling: since the thinnest place of the material is 25 mm thick, and is a fillet weld, the groove type is the double unilateral V-shaped groove, before welding, cleaning the dirt like oil, rust and the like 50 mm away from a weld part, exposing the pure metallic luster within the range of 20 mm, and keeping dry and clean; step 3 of positioning: when positioning, enabling peripheral gaps to be uniform and the unilateral gap not to exceed 0.5 mm; step 4 of welding: wherein welding parameters are as follows: the welding voltage is 25-32 V and the welding current is 200-220 A; weld preheating: the preheating temperature is 300-350 DEG C; during welding, the ambient temperature should not be less than 15 DEG C; welding layer: 4-5 layers and the welding interlayer temperature is about 300 DEG C; after welding, high temperature tempering should be performed in time, and the tempering temperature is 680 DEG C.
Description
Technical field
The present invention relates to the welding method of the manufacture field of auto parts and components, particularly a kind of Hi-Stren steel.
Background technology
Some parts on automobile are to adopt 35CrMnSi Hi-Stren steel and carbon structural steels to be welded, the requirement load that withstands shocks, welding tensile strength is not less than 5.4MPa, because material thickness is thicker, part shape complexity, therefore should adopt manual arc welding.Carbon structural steels is mild steel, good welding performance, but intensity is more much lower than 35CrMnSi Hi-Stren steel, and the welding performance of 35CrMnSi Hi-Stren steel is poor, but intensity is high, after this bi-material welding, be easy to produce cold crack in 35CrMnSi Hi-Stren steel heat affected area and the melting area of welding seam.
Summary of the invention
The welding method that the object of the invention is to overcome the above-mentioned deficiency of prior art and provide a kind of Hi-Stren steel, it can eliminate the factor that produces cold crack, ensures weldquality, reaches product quality requirement.
Technical scheme of the present invention is: a kind of welding method of Hi-Stren steel, comprises following process:
One, before weldering, prepare.
Select welding rod: select the good hydrogen controlled electrode of cracking resistance, before welding rod uses, must dry, bake out temperature is 300-350 DEG C, and insulation 1-2 hour, with getting with use.
Two, bevel.
Because material thinnest part is 25 ㎜, be again angle welding, groove type is two-sided monolateral double V-groove, before weldering, the dirt such as oil, rust of weld 50 ㎜ should be cleaned out, within the scope of 20 ㎜ cleaning expose pure metallic luster, and keep dry, cleaning.
Three, assembling and positioning
When assembling and positioning, should make surrounding gap even, monolateral gap is no more than 0.5 ㎜.
Four, welding
Welding variables: weldingvoltage is 25-32V, welding current is 200-220A.Weld preheating temperature is 300-350 DEG C.When welding, environment temperature must not be lower than 15 DEG C.Welding level is 4-5 layer, and weld interpass temperature is 300 DEG C of left and right.Postwelding will carry out high tempering in time, and temperature is 680 DEG C.If parts are too large or there is no Equipment for Heating Processing, can postheating arrive 300-350 DEG C, be incubated after 30 minutes, put into insulation material and carry out slow cooling, in order to avoid produce martensitic structure.
The present invention compared with prior art has following features: through repeatedly taking above the method for a series of guarantee weld strengths, thereby eliminated the factor that produces cold crack, ensured weldquality, reached product quality requirement.We adopt said welding method, have successfully carried out the welding of Hi-Stren steel and mild steel.In long-term use procedure, never there is any weld defect in this welding assembly, has obtained user's favorable comment
Detailed description of the invention
Embodiment mono-: a kind of welding method of Hi-Stren steel, it comprises the following steps:
One, before weldering, prepare.
Select welding rod: select the good hydrogen controlled electrode of cracking resistance, before welding rod uses, must dry, bake out temperature is 300 DEG C, is incubated 1 hour, with getting with use.
Two, bevel.
Because material thinnest part is 25 ㎜, be again angle welding, groove type is two-sided monolateral double V-groove, before weldering, the dirt such as oil, rust of weld 50 ㎜ should be cleaned out, within the scope of 20 ㎜ cleaning expose pure metallic luster, and keep dry, cleaning.
Three, assembling and positioning
When assembling and positioning, should make surrounding gap even, monolateral gap is no more than 0.5 ㎜.
Four, welding
Welding variables: weldingvoltage is 25-32V, welding current is 200-220A, weld preheating temperature is 300 DEG C, when welding, environment temperature must not be lower than 15 DEG C, welding level is 4 layers, and weld interpass temperature is 300 DEG C of left and right, and postwelding will carry out high tempering in time, temperature is 680 DEG C, if parts are too large or there is no Equipment for Heating Processing, postheating to 300 DEG C, was incubated after 30 minutes, put into insulation material and carry out slow cooling, in order to avoid produce martensitic structure.
Embodiment bis-: a kind of welding method of Hi-Stren steel, it comprises the following steps:
Two, before weldering, prepare.
Select welding rod: select the good hydrogen controlled electrode of cracking resistance, before welding rod uses, must dry, bake out temperature is 350 DEG C, is incubated 2 hours, with getting with use.
Two, bevel.
Because material thinnest part is 25 ㎜, be again angle welding, groove type is two-sided monolateral double V-groove, before weldering, the dirt such as oil, rust of weld 50 ㎜ should be cleaned out, within the scope of 20 ㎜ cleaning expose pure metallic luster, and keep dry, cleaning.
Three, assembling and positioning
When assembling and positioning, should make surrounding gap even, monolateral gap is no more than 0.5 ㎜.
Four, welding
Welding variables: weldingvoltage is 25-32V, welding current is 200-220A, weld preheating temperature is 350 DEG C.When welding, environment temperature must not be lower than 15 DEG C, and welding level is 5 layers, and weld interpass temperature is 300 DEG C of left and right.Postwelding will carry out high tempering in time, and temperature is 680 DEG C, if parts are too large or there is no Equipment for Heating Processing, postheating to 350 DEG C, was incubated after 30 minutes, puts into insulation material and carries out slow cooling, in order to avoid produce martensitic structure.
Embodiment tri-: a kind of welding method of Hi-Stren steel, it comprises the following steps:
One, before weldering, prepare.
Select welding rod: select the good hydrogen controlled electrode of cracking resistance, before welding rod uses, must dry, bake out temperature is respectively 310 DEG C and 320 DEG C and 330 DEG C and 340 DEG C, is incubated 1.5 hours, with getting with use.
Two, bevel.
Because material thinnest part is 25 ㎜, be again angle welding, groove type is two-sided monolateral double V-groove, before weldering, the dirt such as oil, rust of weld 50 ㎜ should be cleaned out, within the scope of 20 ㎜ cleaning expose pure metallic luster, and keep dry, cleaning.
Three, assembling and positioning
When assembling and positioning, should make surrounding gap even, monolateral gap is no more than 0.5 ㎜.
Four, welding
Welding variables: weldingvoltage is 25-32V, welding current is 200-220A, weld preheating temperature is respectively 310 DEG C, 320 DEG C, 330 DEG C, 340 DEG C, when welding, environment temperature must not be lower than 15 DEG C, welding level is 4-5 layer, 300 DEG C of weld interpass temperatures, postwelding will carry out high tempering in time, temperature is 680 DEG C, if parts are too large or there is no an Equipment for Heating Processing, can postheating to 330 DEG C, be incubated after 40 minutes, put into insulation material and carry out slow cooling, in order to avoid produce martensitic structure.
Claims (5)
1. a welding method for Hi-Stren steel, is characterized in that: it comprises following process:
One, before weldering, prepare: select welding rod, select the good hydrogen controlled electrode of cracking resistance, before welding rod uses, must dry, bake out temperature is 300-350 DEG C, insulation 1-2 hour;
Two, bevel: groove type is two-sided monolateral double V-groove, weldering before the dirt such as oil, rust of weld 50 ㎜ is cleaned out, within the scope of 20 ㎜ clear up expose pure metallic luster, and keep dry, cleaning;
Three, assembling and positioning: should make surrounding gap even when assembling and positioning, monolateral gap is no more than 0.5 ㎜;
Four, welding: welding variables: weldingvoltage is 25-32V, welding current is 200-220A, weld preheating temperature is 300-350 DEG C; When welding, environment temperature must not be lower than 15 DEG C, and welding level is 4-5 layer, and weld interpass temperature is 300 DEG C.
2. the welding method of a kind of Hi-Stren steel according to claim 1, is characterized in that: postwelding will carry out high tempering in time, and temperature is 680 DEG C.
3. the welding method of a kind of Hi-Stren steel according to claim 1, is characterized in that: postheating, to 300-350 DEG C, is incubated after 30 minutes, puts into insulation material and carries out slow cooling.
4. the welding method of a kind of Hi-Stren steel according to claim 1 and 2, it is characterized in that: before weldering, prepare: select welding rod, select the good hydrogen controlled electrode of cracking resistance, before welding rod uses, must dry, bake out temperature is 310 DEG C, 320 DEG C, 330 DEG C or 340 DEG C, is incubated 1.5 hours.
5. the welding method of a kind of Hi-Stren steel according to claim 1 and 2, it is characterized in that: welding variables: weldingvoltage is 25-32V, welding current is 200-220A, 310 DEG C, 320 DEG C, 330 DEG C or 340 DEG C of weld preheating temperature, when welding, environment temperature must not be lower than 15 DEG C, welding level is 4-5 layer, and weld interpass temperature is 300 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210520594.XA CN103846531A (en) | 2012-12-07 | 2012-12-07 | Welding method of low-alloy high-strength steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210520594.XA CN103846531A (en) | 2012-12-07 | 2012-12-07 | Welding method of low-alloy high-strength steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103846531A true CN103846531A (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210520594.XA Pending CN103846531A (en) | 2012-12-07 | 2012-12-07 | Welding method of low-alloy high-strength steel |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06285640A (en) * | 1993-03-31 | 1994-10-11 | Nippon Steel Corp | Inner surface welding method for clad steel tube |
| CN1962151A (en) * | 2006-11-22 | 2007-05-16 | 山东大学 | Process for welding 800MPa high-strength steel without preheating |
| CN101332528A (en) * | 2008-08-04 | 2008-12-31 | 武汉钢铁(集团)公司 | High intensity bridge steel manual welding technique method |
| CN101337298A (en) * | 2007-07-05 | 2009-01-07 | 四川神坤装备股份有限公司 | Low-alloy high-strength steel welding process |
| CN101733562A (en) * | 2009-12-08 | 2010-06-16 | 山东大学 | 900MPa high-strength steel preheating-free combined welding method |
| CN102179606A (en) * | 2011-02-18 | 2011-09-14 | 济钢集团有限公司 | Welding process for 1,000MPa level non-quenched and tempered high-strength steel |
-
2012
- 2012-12-07 CN CN201210520594.XA patent/CN103846531A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06285640A (en) * | 1993-03-31 | 1994-10-11 | Nippon Steel Corp | Inner surface welding method for clad steel tube |
| CN1962151A (en) * | 2006-11-22 | 2007-05-16 | 山东大学 | Process for welding 800MPa high-strength steel without preheating |
| CN101337298A (en) * | 2007-07-05 | 2009-01-07 | 四川神坤装备股份有限公司 | Low-alloy high-strength steel welding process |
| CN101332528A (en) * | 2008-08-04 | 2008-12-31 | 武汉钢铁(集团)公司 | High intensity bridge steel manual welding technique method |
| CN101733562A (en) * | 2009-12-08 | 2010-06-16 | 山东大学 | 900MPa high-strength steel preheating-free combined welding method |
| CN102179606A (en) * | 2011-02-18 | 2011-09-14 | 济钢集团有限公司 | Welding process for 1,000MPa level non-quenched and tempered high-strength steel |
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Application publication date: 20140611 |