CN105750711A - Q390 steel flat plate submerged-arc welding process - Google Patents

Abstract

The invention discloses a Q390 steel flat plate submerged-arc welding process. The Q390 steel flat plate submerged-arc welding process includes the following steps: 1) welding preparation; 2) operating points: (1) essentials of arc starting and arc stopping, skills of flexible adjustment of welding parameters, operation of a submerged-arc welding machine, and operating skills of butt welding; (2) a welding device, wherein an MZ-1000 type submerged-arc welding machine is selected, an external line of which accesses alternating current; and a BX2-1000 type arc welding transformer is selected; (3) a welding flux, wherein an SJ101 type welding flux is selected, and drying is performed before welding; (4) a wire for welding, wherein an H08MnMo wire for welding is selected, and the diameter of which is 5 mm; (5) welding pieces, wherein two Q390 steel flat plates with the specification of 20*100*300 are selected; (6) an arc starting plate and an arc outlet plate, wherein the arc starting plate and the arc outlet plate are made of a low alloy steel plate; and 3) operating steps before arc starting: (1) checking if the external line of the welding machine is correct or not; (2) adjusting a track position, and arranging a welding tractor on a track; (3) clamping a wound welding wire disc on a fixing position, and then arranging the welding flux in a welding funnel; (4) switching on a welding power supply and a control cabinet power supply; and (5) adjusting a position of the wire for welding, and then allowing the wire for welding to align the center of a weld joint, and adjusting a tip to allow the extension length of the wire for welding to be 5-8 mm.

Description

A kind of Q390 steel flat board submerged welding process

Technical field

The present invention relates to a kind of Q390 steel flat board submerged welding process.

Background technology

The adjustment in processing step and device parameter etc. of the existing Q390 steel flat board submerged welding process there is also certain empirical and technical, for the operator newly started with, also need to carry out substantial amounts of exercise and could grasp operation skill, produce the good product of quality.

Summary of the invention

In order to realize the purpose of the present invention, the present invention provides the Q390 steel flat board submerged welding process of a kind of easy to operate, quick, easy left-hand seat.

For solving above-mentioned technical problem, the present invention adopts the following technical scheme that

A kind of Q390 steel flat board submerged welding process, including following operation:

1) prepare before weldering

1.1) selection of groove and processing: the electric current used due to submerged-arc welding is relatively larger, and depth of penetration is relatively larger, when weldment thickness is 14 ~ 22mm, generally opens one side V-butt, and mother metal thickness used by this technique is 20mm, therefore can open one side V-butt

1.2) cleaning of weldment: before welding, it is necessary to groove and the corrosion on surface, welding position, greasy dirt, moisture, oxide skin etc. are removed clean；Method has manual removal (such as wire brush, pneumatic grinding wheel etc.), mechanical removal (such as shot-peening) etc.；

1.3) drying of the cleaning of welding wire and solder flux: before welding, it is necessary to by clean for the dirt removals such as the greasy dirt of welding wire surface, rust；For preventing hydrogen from invading weld seam, to the necessary strict drying of solder flux, and use immediately after requiring drying；SJ101 solder flux requires 300 ~ 350 DEG C, 2h drying；

1.4) assembling of weldment: weldment assembling time, it is necessary to assure gap uniformity, height smooth, especially with single face welding and double face once-forming time more it should be noted that；The position of tack welding should at the back side of first weld seam, and length generally should be greater than 30mm；When vertical masonry joint weldment assembles, still need and add run-on tab and end tab, to remove the defect easily produced when striking and ending, such as arc crater etc.；

2), key points for operation:

(1) main points of striking and receipts arc；Adjust the skill of welding condition flexibly；The manipulation of submerged arc welding machine, flat butt welding operant skill；

(2) welding equipment MZ 1000 type submerged arc welding machine, its external cabling, connect alternating current；BX2 1000 type arc welding transformer；

(3) solder flux SJ101, dries before weldering；

(4) welding wire H08MnMo, diameter 5mm；

(5) weldment Q390 steel flat board two pieces, specification :-20 × 100 × 300；

(6) run-on tab and end tab low alloy steel plate；

3), the operating procedure before striking

(1) check that whether welding machine external cabling is correct；

(2) adjust orbital position, welding tractor is put in orbit；

(3) wire reel coiled is clipped on fixed position, then solder flux is contained in flux hopper；(4) source of welding current and control chamber power supply are connected；

(5) welding wire position is adjusted so that it is alignment Weld pipe mill；Adjusting ignition tip makes electrode extension be 5～8mm.

The present invention is simple to operate, and operator's skill requirement is low, and product quality is high.

Detailed description of the invention

Below in conjunction with embodiment, the invention will be further described:

A kind of Q390 steel flat board submerged welding process, including following operation:

1) prepare before weldering

1.1) selection of groove and processing: the electric current used due to submerged-arc welding is relatively larger, and depth of penetration is relatively larger, when weldment thickness is 14 ~ 22mm, generally opens one side V-butt, and mother metal thickness used by this technique is 20mm, therefore can open one side V-butt

1.2) cleaning of weldment: before welding, it is necessary to groove and the corrosion on surface, welding position, greasy dirt, moisture, oxide skin etc. are removed clean；Method has manual removal (such as wire brush, pneumatic grinding wheel etc.), mechanical removal (such as shot-peening) etc.；

1.3) drying of the cleaning of welding wire and solder flux: before welding, it is necessary to by clean for the dirt removals such as the greasy dirt of welding wire surface, rust；For preventing hydrogen from invading weld seam, to the necessary strict drying of solder flux, and use immediately after requiring drying；SJ101 solder flux requires 300 ~ 350 DEG C, 2h drying；

1.4) assembling of weldment: weldment assembling time, it is necessary to assure gap uniformity, height smooth, especially with single face welding and double face once-forming time more it should be noted that；The position of tack welding should at the back side of first weld seam, and length generally should be greater than 30mm；When vertical masonry joint weldment assembles, still need and add run-on tab and end tab, to remove the defect easily produced when striking and ending, such as arc crater etc.；

2), key points for operation:

(1) main points of striking and receipts arc；Adjust the skill of welding condition flexibly；The manipulation of submerged arc welding machine, flat butt welding operant skill；

(2) welding equipment MZ 1000 type submerged arc welding machine, its external cabling, connect alternating current；BX2 1000 type arc welding transformer；

(3) solder flux SJ101, dries before weldering；(

4) welding wire H08MnMo, diameter 5mm；

(5) weldment Q390 steel flat board two pieces, specification :-20 × 100 × 300；

(6) run-on tab and end tab low alloy steel plate；

3), the operating procedure before striking

(1) check that whether welding machine external cabling is correct；

(2) adjust orbital position, welding tractor is put in orbit；

(3) wire reel coiled is clipped on fixed position, then solder flux is contained in flux hopper；(4) source of welding current and control chamber power supply are connected；

(5) welding wire position is adjusted so that it is alignment Weld pipe mill；Adjusting ignition tip makes electrode extension be 5～8mm.

Claims (1)

1. a Q390 steel flat board submerged welding process, is characterized in that: include following operation:

1) prepare before weldering

1.1) selection of groove and processing: the electric current used due to submerged-arc welding is relatively larger, and depth of penetration is relatively larger, when weldment thickness is 14 ~ 22mm, generally opens one side V-butt, and mother metal thickness used by this technique is 20mm, therefore can open one side V-butt

1.2) cleaning of weldment: before welding, it is necessary to groove and the corrosion on surface, welding position, greasy dirt, moisture, oxide skin etc. are removed clean；Method has manual removal (such as wire brush, pneumatic grinding wheel etc.), mechanical removal (such as shot-peening) etc.；

1.3) drying of the cleaning of welding wire and solder flux: before welding, it is necessary to by clean for the dirt removals such as the greasy dirt of welding wire surface, rust；For preventing hydrogen from invading weld seam, to the necessary strict drying of solder flux, and use immediately after requiring drying；SJ101 solder flux requires 300 ~ 350 DEG C, 2h drying；

1.4) assembling of weldment: weldment assembling time, it is necessary to assure gap uniformity, height smooth, especially with single face welding and double face once-forming time more it should be noted that；The position of tack welding should at the back side of first weld seam, and length generally should be greater than 30mm；When vertical masonry joint weldment assembles, still need and add run-on tab and end tab, to remove the defect easily produced when striking and ending, such as arc crater etc.；

2), key points for operation:

(1) main points of striking and receipts arc；Adjust the skill of welding condition flexibly；The manipulation of submerged arc welding machine, flat butt welding operant skill；

(2) welding equipment MZ 1000 type submerged arc welding machine, its external cabling, connect alternating current；BX2 1000 type arc welding transformer；

(3) solder flux SJ101, dries before weldering；

(4) welding wire H08MnMo, diameter 5mm；

(5) weldment Q390 steel flat board two pieces, specification :-20 × 100 × 300；

(6) run-on tab and end tab low alloy steel plate；

3), the operating procedure before striking

(1) check that whether welding machine external cabling is correct；

(2) adjust orbital position, welding tractor is put in orbit；

(3) wire reel coiled is clipped on fixed position, then solder flux is contained in flux hopper；(4) source of welding current and control chamber power supply are connected；

(5) welding wire position is adjusted so that it is alignment Weld pipe mill；Adjusting ignition tip makes electrode extension be 5～8mm.