CN105983798A - Manufacture process of high-strength welding wires - Google Patents
Manufacture process of high-strength welding wires Download PDFInfo
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- CN105983798A CN105983798A CN201510044518.XA CN201510044518A CN105983798A CN 105983798 A CN105983798 A CN 105983798A CN 201510044518 A CN201510044518 A CN 201510044518A CN 105983798 A CN105983798 A CN 105983798A
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Abstract
The invention discloses a manufacture process of high-strength welding wires capable of producing manufacture process of high-strength welding wires with high composite performance. The process comprises following steps: smelting welding wires, performing acid pickling in an off-line manner, pulling and pushing welding wires, plating welding wires with copper and welding welding wires layer by layer. The middle link of the step for pulling and pushing welding wires comprises an annealing process of welding wires. An experiment shows that the annealing process added to the middle link of the step for pulling and pushing welding wires has great advantages. Therefore, the annealing process is selected for production of high-strength welding wires. The high-strength welding wires do not crake during production and smooth production of processes for pulling and pushing welding wires, plating welding wires with copper is ensured. As a result, smooth production of high-strength welding wires is ensured and welding wires produced are featured by being good in cooper plating bonding force and usage performance, stable in arcs and little in weld spatter and attractive in welding line formation.
Description
Technical field
The invention belongs to welding wire field, particularly relate to process for manufacturing welding wire.
Background technology
At present, in welding wire production field, especially in the manufacturing process of more than 780MPa rank high-strength welding wire, the major alloy system of welding wire uses Mn-Ni-Cr-Mo system, it is to improve the use processing performance of welding wire and improve the low temperature impact properties of deposited metal simultaneously, welding wire adds a certain amount of micro alloying element Ti and Zr.Increase due to soldering wire alloy constituent content, the hardness causing dish unit increases, plasticity reduces, welding wire processing hardening aggravation, owing to the semi-finished product intensity of high-strength welding wire is high, drawing process is very easy to cracking, the biggest difficulty increased to processes such as the drawing tube reducing of welding wire, copper facing, conventional manufacturing process, it cannot be guaranteed that the smooth production of welding wire, is worthless drawing manufacturing process.
Summary of the invention
In order to solve the problems referred to above, the invention provides the high-strength welding wire manufacturing process that a kind of output high-strength welding wire combination property is high.
According to an aspect of the present invention, it is provided that a kind of high-strength welding wire manufacturing process, its step includes that welding wire is smelted, off-line pickling, drawing welding wire, coppered welding wire, and welding wire layer is around, the intermediate link increase welding wire annealing process of described drawing welding wire.Fact proved, the intermediate link at drawing welding wire carries out Annealing Scheme and has the biggest advantage.Therefore, high-strength welding wire produces and selects this Annealing Scheme.It provides the benefit that: avoids in high-strength welding wire production process and ftractures, ensure that being smoothed out in the technique such as drawing welding wire, copper facing, thus ensure that the smooth production of high-strength welding wire, it is good that the welding wire of output has copper facing adhesion, use good manufacturability, arc stability, the features such as spatter is little, and appearance of weld is attractive in appearance.
In some embodiments, in described drawing welding wire, the operating angle of drawing mould is along with the size decision before and after drawing welding wire, and the computing formula of described operating angle is: 2 α=(D0-D1)/D0* 180/3.14*4, wherein D0It is inlet wire size, D1It is linear dimension。It provides the benefit that: avoid wire surface inhomogeneous deformation during drawing welding wire, owing to welding stick original material material intensity is high, prevents the weak effect of welding wire surface after repeatedly drawing, and the mould proportioning of each passage follows dies compress rate proportioning on a declining curve.
In some embodiments, in described drawing welding wire, the coefficient of friction of drawing mould lubricant is 0.03-0.05, and uses calcium system slightly pulling out the first passage, and remaining passage uses sodium system.It provides the benefit that: the lubricity being effectively guaranteed in drawing and the easiness of subsequent treatment.
In some embodiments, iron concentration≤35g/L in pickle in described off-line pickling, concentration of hydrochloric acid is 10% to 15%.It provides the benefit that: the residuals such as after cleaning, wire surface quality is good, non-scale, acomia crow phenomenon, solves original cleaning quality unsteady phenomena.
In some embodiments, the mixed gas that protective atmosphere is methanol and nitrogen in described welding wire annealing process.It provides the benefit that: reducing oxidization burning loss and the decarburization of welding wire, welding wire annealing rear surface oxide skin is few, and use cost is relatively low.
In some embodiments, the temperature retention time computing formula of described welding wire annealing process is: t=AKD, wherein t is heat time heating time (unit: min), A is heating coefficient (unit: min/mm), air resistance-heated furnace carry out steel alloy annealing time be 1.3-1.6, K is shove charge condition correction factor, and generally taking 1-1.5, D is workpiece effective thickness (unit: mm).It provides the benefit that: disclosure satisfy that its technological requirement.
In some embodiments, described welding wire annealing process tapping temperature is 300 DEG C.It provides the benefit that: come out of the stove during this temperature, and raw material drawing welding wire smoothness is preferable.
In some embodiments, in described coppered welding wire technique, alkali cleaning temperature is 80 ~ 90 DEG C, and alkali cleaning electric current is 600 ~ 650A, and alkali cleaning concentration is 80 ~ 90g/L, and pickling electric current is 200 ~ 250A, and the parameter and standard that copper facing is taked is [H2SO4]=
60 ~ 70 g/L, [Fe2 +]≤60 g/L, [Cu2 +]=15 ~ 20 g/L, temperature T=35 ~ 40 DEG C, E1 additive.It provides the benefit that: ensure that the surface quality height of finished product welding wire, antirust ability is strong and welding wire serviceability is high, improves cleanout fluid cleansing power and electrolytic conduction ability, can remove coke and lubricant that welding wire surface is difficult to remove easily.
Accompanying drawing explanation
Fig. 1 is the mould proportioning data slightly pulling out employing without welding wire in welding wire annealing process.
Fig. 2 is the mould proportioning data pulling out employing without welding wire essence in welding wire annealing process.
Fig. 3 is welding wire semi-finished product tensile strength test data result in drawing process.
Fig. 4 is drawing mould total passage experimental data after raw material annealing.
Fig. 5 is drawing mould total passage experimental data that raw material drawing intermediate link carries out annealing.
Fig. 6 is that two kinds of welding wire annealing experimental program data on opportunity compare.
Fig. 7 is the Integrated comparative of two kinds of annealing experimental program data on opportunity.
Fig. 8 is the experimental data of protective atmosphere screening in welding wire annealing process.
Detailed description of the invention
Below in conjunction with step and experimental data form, the present invention is further illustrated.High-strength welding wire manufacturing process, its step includes that welding wire is smelted, off-line pickling, drawing welding wire, coppered welding wire, and welding wire layer increases welding wire annealing process around the intermediate link of, described drawing welding wire.
In the research of welding wire annealing necessity, pull out the mould proportioning of employing the most as shown in Figures 1 and 2 without the mould proportioning and essence slightly pulling out employing in welding wire annealing process.Slightly pulling out process practical situation to be recorded as: when being drawn to specification during 3.85mm, there is shinny situation in welding wire semi-finished product, when being drawn to 3.55mm specification, welding wire central burst phenomenon occur, and when being drawn to 2.55mm specification, welding wire central burst phenomenon is more.Essence is pulled out process practical situation and is recorded as: owing to central burst causes welding wire normally to produce.
Semi-finished product tensile strength test result in drawing process is as shown in Figure 3, shown by experiment list data: the difficulty of the 1000MPa level welding stick original material material unannealed direct drawing of employing is the highest, and it cannot be guaranteed that the smoothness produced, it is worthless drawing manufacturing process.
In welding wire annealing process, experiment when optimizing annealing opportunity is as shown in figures 4 and 5, after raw material annealing, drawing and drawing intermediate link carry out annealing the most as shown in figures 4 and 5, two data forms show, the intermediate link of drawing welding wire uses the total passage of drawing mould used by Annealing Scheme less, and can obtain more preferable drawing property, lower processing characteristics, lower power consumption of polymer processing and more preferable product quality.
Two kinds of welding wires annealing experimental programs on opportunity compare as shown in Figure 6, from two list datas it can be seen that after the intermediate link of drawing welding wire carries out welding wire annealing process semi-finished product tensile strength lower, more conducively product manufacturing.It is lower that the intermediate link of drawing welding wire carries out the finished product tensile strength after annealing process, and beneficially client uses.
The Integrated comparative of two kinds of annealing experimental programs on opportunity is as shown in Figure 7, can draw from comparing form, using and carry out Annealing Scheme in the intermediate link of drawing and have the biggest advantage, therefore, actual welding wire production selection drawing welding wire intermediate link carries out welding wire annealing process.
Owing to welding stick original material material intensity is high, in order to avoid wire surface inhomogeneous deformation during drawing welding wire, prevent the weak effect of welding wire surface after repeatedly drawing, the mould proportioning of each passage follows dies compress rate proportioning on a declining curve, during wire drawing, wish that drawing mould operating angle is the least, if but operating angle is the least, lubricant will be little in wire rod surface attachment, so, in drawing welding wire, the operating angle of drawing mould is along with the size decision before and after drawing welding wire, and the computing formula of described operating angle is: 2 α=(D0-D1)/D0* 180/3.14*4, wherein D0It is inlet wire size, D1It is linear dimension。
In order to effectively ensure the lubricity in drawing welding wire and the easiness of subsequent treatment, in described drawing welding wire, the coefficient of friction of drawing mould lubricant is 0.03-0.05, and uses calcium system slightly pulling out the first passage, and remaining passage uses sodium system.
Owing to high-strength welding wire component system with the addition of multiple alloying element, make to clean difficulty to increase, need to be solved by the iron ion content and raising Acidwash solution concentration that control Acidwash solution, to ensure that after cleaning, wire surface quality is good, non-scales etc. remain, acomia crow phenomenon, solves original cleaning quality unsteady phenomena.Iron concentration≤35 g/L in pickle in described off-line pickling, concentration of hydrochloric acid is 10% to 15%.
In order to reduce oxidization burning loss and the decarburization of welding wire; ensure that welding wire annealing rear surface oxide skin is few; protective atmosphere is selected in welding wire annealing process; screening experiment data are as shown in Figure 8; can be drawn by list data; the mixed gas that protective atmosphere is methanol and nitrogen in described welding wire annealing process, and the use cost of atmosphere protection is low.
When determining the shortest time meeting its welding wire annealing process requirement, the temperature retention time computing formula of described welding wire annealing process is: t=AKD, wherein t is heat time heating time (unit: min), A is heating coefficient (unit: min/mm), air resistance-heated furnace carry out steel alloy annealing time be 1.3-1.6, K is shove charge condition correction factor, and generally taking 1-1.5, D is workpiece effective thickness (unit: mm).
In order to ensure welding wire annealing come out of the stove after drawing smoothness good, described welding wire annealing process tapping temperature is 300 DEG C.
Coppered welding wire technique process produces material impact to surface quality, antirust ability and the welding wire serviceability of finished product welding wire, owing to high-strength welding wire raw material tensile strength is high, case hardness is high, the lubricant making welding wire surface of semi-finished is converted into the coke being very difficult to remove in drawing process more, drawing process uses little die entrance angle and repeatedly increases lubricant carrier to ensure that lubricant can be attached to welding wire surface as much as possible, moreover in welding wire annealing link, welding wire surface of semi-finished can produce black carbon rich coating.In described coppered welding wire technique, alkali cleaning temperature is 80 ~ 90 DEG C, and alkali cleaning electric current is 600 ~ 650A, and alkali cleaning concentration is 80 ~ 90g/L, and pickling electric current is 200 ~ 250A, and the parameter and standard that copper facing is taked is [H2SO4]=
60 ~ 70 g/L, [Fe2 +]≤60 g/L, [Cu2 +]=15 ~ 20 g/L, temperature T=35 ~ 40 DEG C, E1 additive.Improve electric current density and electrically steep generation to improve, and improve cleanout fluid cleansing power and electrolytic conduction ability, coke and lubricant that welding wire surface is difficult to remove can be removed easily.
Above-described is only some embodiments of the present invention, it is noted that for the person of ordinary skill of the art, on the premise of the creation without departing from the present invention is conceived, it is also possible to making other deformation and improve, these broadly fall into protection scope of the present invention.
Claims (8)
1. high-strength welding wire manufacturing process, its step includes that welding wire is smelted, off-line pickling, drawing welding wire, coppered welding wire, and welding wire layer increases welding wire annealing process around the intermediate link of, it is characterised in that described drawing welding wire.
2. high-strength welding wire manufacturing process as claimed in claim 1, it is characterised in that in described drawing welding wire, the operating angle of drawing mould is along with the size decision before and after drawing welding wire, and the computing formula of described operating angle is: 2 α=(D0-D1)/D0* 180/3.14*4, wherein D0It is inlet wire size, D1It is linear dimension。
3. high-strength welding wire manufacturing process as claimed in claim 1, it is characterised in that in described drawing welding wire, the coefficient of friction of drawing mould lubricant is 0.03-0.05, and use calcium system slightly pulling out the first passage, remaining passage uses sodium system.
4. high-strength welding wire manufacturing process as claimed in claim 1, it is characterised in that iron concentration≤35g/L in pickle in described off-line pickling, concentration of hydrochloric acid is 10% to 15%.
5. high-strength welding wire manufacturing process as claimed in claim 1, it is characterised in that the mixed gas that protective atmosphere is methanol and nitrogen in described welding wire annealing process.
6. high-strength welding wire manufacturing process as claimed in claim 1, it is characterized in that, the temperature retention time computing formula of described welding wire annealing process is: t=AKD, wherein t is heat time heating time (unit: min), A is heating coefficient (unit: min/mm), air resistance-heated furnace carry out steel alloy annealing time be 1.3-1.6, K be shove charge condition correction factor, generally taking 1-1.5, D is workpiece effective thickness (unit: mm).
7. high-strength welding wire manufacturing process as claimed in claim 1, it is characterised in that described welding wire annealing process tapping temperature is 300 DEG C.
8. high-strength welding wire manufacturing process as claimed in claim 1, it is characterised in that in described coppered welding wire technique, alkali cleaning temperature is 80 ~ 90 DEG C, alkali cleaning electric current is 600 ~ 650A, alkali cleaning concentration is 80 ~ 90g/L, and pickling electric current is 200 ~ 250A, and the parameter and standard that copper facing is taked is [H2SO4]=
60 ~ 70 g/L, [Fe2 +]≤60 g/L, [Cu2 +]=15 ~ 20 g/L, temperature T=35 ~ 40 DEG C, E1 additive.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107309286A (en) * | 2017-07-06 | 2017-11-03 | 昆山中冶宝钢焊接材料有限公司 | It is a kind of to reduce the drawing process of welding wire surface powdered lubricant carrying amount |
| CN110252833A (en) * | 2019-07-03 | 2019-09-20 | 天津市永昌焊丝有限公司 | 70 kilograms or less, 70 kilograms and the above high-strength steel drawing welding wire technique and application |
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| CN102935560A (en) * | 2012-11-14 | 2013-02-20 | 四川大西洋焊接材料股份有限公司 | Silicon bronze solder wire and preparation method thereof |
| CN102941417A (en) * | 2012-11-14 | 2013-02-27 | 四川大西洋焊接材料股份有限公司 | Tin bronze welding wire and preparation method thereof |
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2015
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107309286A (en) * | 2017-07-06 | 2017-11-03 | 昆山中冶宝钢焊接材料有限公司 | It is a kind of to reduce the drawing process of welding wire surface powdered lubricant carrying amount |
| CN110252833A (en) * | 2019-07-03 | 2019-09-20 | 天津市永昌焊丝有限公司 | 70 kilograms or less, 70 kilograms and the above high-strength steel drawing welding wire technique and application |
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