CN106925919A - Prepare the Hubbing method and welding wire machine and welding wire and purposes of 21-10Mn7Mo welding wires - Google Patents

Abstract

A kind of technique of the Hubbing method and welding wire machine and welding wire and purposes, particularly drawing for preparing 21-10Mn7Mo welding wires, and its technique unit with mould.The silk material construction of drawing unit.Wherein：The step of there is first time drawing with mold technique：The wire rod of preset diameters size is sequentially passed through into solution treatment, pickling processes, coating treatment, drawing is dipped in, total draft of first time drawing process is 56%, is derived from first silk material of preset diameters size；The step of second drawing：First silk material is sequentially passed through into oil processing, bright annealing treatment, coating treatment, second drawing process are dipped in, total draft of drawing is 57%, is derived from the second silk material of preset diameters size；The step of third time drawing：Second silk material is sequentially passed through into oil processing, bright annealing treatment, coating treatment, third time drawing process are dipped in, total draft of drawing is 75%, is derived from the 3rd road silk material of preset diameters size.

Description

Prepare the Hubbing method and welding wire machine and welding wire and purposes of 21-10Mn7Mo welding wires

Technical field

This case belongs to welding field, be related to the solid core welding wire of gas shielded arc welding preparation method and its intermediate maturity and Finished product and its process equipment.The particularly technique of drawing, and its technique unit with mould.The silk material construction of drawing unit,

Background technology

The application of stainless steel welding stick, welding rod in automatic technology is more and more, but stainless steel prepared by prior art The common quality problems of welding wire are that welding wire outward appearance is bad, wire feed is not sufficiently stable, therefore, it is difficult to meet automatic welding equipment high It is required that.

General to understand, the slight change of the chemical composition that Quality of Final Welding Wire causes with steel-making has close relation, with material The impurity content of composition has close relation, it is important that process and process equipment prepared by welding wire is related to welding wire The quality of semi-finished product, finished product.For this industry did many effort in this respect, prior art is included but is not limited to：

" the welding solid core welding wire of 03110146.1 non-plating " is disclosed such as Chinese patent, wherein containing C, Si, Mn, Ti, file provides condition as each element during content in welding wire etc. technique using Si, Mn, Ti and constitutes, and elaboration can Improve the feeding and striking of welding wire.

And for example Chinese patent discloses " production methods of 200410057630.9 solid welding wires " step and includes：For drawing The drying solid lubricant of silk help it is lower use roller die wire drawing, for wire drawing drying solid lubricant at least contain odium stearate or Potassium stearate；The welding wire surface of the equipment drawing that oils will be being used for the lubricant applying of welding wire charging.It is high with roller die Fast wire drawing.

For another example Chinese patent discloses " 200410057948.7 method for manufacturing seamed flux-cored wires ", step bag Include：The flux cored wire of filling flux formation is included therein using lubricant stretching；By physical method from the welding wire of stretching Removal lubricant；And coated on welding wire surface for feed welding wire lubricant (coating oil).In welding wire stretching step, Lubricant is stretched using the welding wire comprising sulfur-bearing high pressure lubricant.

As Chinese patent discloses " a kind of manufacture methods of welding wire of 98800383.X ", wherein, to welding wire raw material line Wire drawing carries out supplying powdered lubricant successively while real with least a portion of the wire-drawing process in the method for manufacturing welding wire The wire drawing of dry type casement, the wire drawing of roller die formula and the wet type casement wire drawing applied.Powder is moistened with above-mentioned dry type casement wire drawing Lubrication prescription strength press-in welding wire surface, it is therefore an objective to make welding wire surface as mat surface.

Further, Chinese patent 200910052322.X discloses a kind of preparation method of stainless steel.

Chinese patent 200910223502.X is disclosed and is suitable for aging martensitic stainless steel welding wire.

Also prior art H1Cr21Ni10Mn6 welding wires, are mainly used in the automatic weldings such as heavy type, oversize vehicle, this case It is the further improvement as Developed Background, it is therefore intended that further improve the tensile strength of welding wire, improve its deposited metal Tensile strength, also have including but not limited to following disclosures for this：

As Chinese patent 201110104281.1 discloses a kind of welding wire, wire rod and its is related to wire rod and welding wire using it.

Further, the previously proposed Chinese patent application of applicant in this case " 21-10Mn7Mo steel ingots and its smelting process, application Number it is 201310756138X ", and it puies forward the prior art background stated, and is hereby incorporated, and repeats no more.

There are following problems demands and solve in existing technology.

This case welding wire is the innovation on the basis of existing H1Cr21Ni10Mn6 welding wires, including adds appropriate Mo, together When be correspondingly improved the content of Mn, problem is that the change of thus material composition can bring difficulty in process to the production in later stage.

General to understand, in certain limit, molybdenum can decline the plasticity of steel alloy and toughness for content of the molybdenum in steel alloy, Due to the factor of 21-10Mn7Mo material compositions described in this case, intensity is high, and crackle is also easy to produce in its process of tube plug drawing mill.

Crackle is more during the problem that prior art is present includes high intensity welding wire process of tube plug drawing mill, and lumber recovery is very low.High intensity Welding wire has that wire feed is not smooth in use, easily the problem of stifled tip.Therefore industry is urgently by including including drawing The improvement of process solves such problem.

The reason for component of existing technology reason welding wire, the preparation method of welding wire and process equipment, it is impossible to well Overcome above-mentioned problem.

The content of the invention

Problem to be solved by this invention is the drawbacks described above for overcoming aforementioned techniques to exist, and provides a kind of for preparation The Hubbing method of 21-10Mn7Mo welding wires and its technique unit and its finished product with mould and middle product.

The present invention solves technical problem and takes following technical scheme to realize, prepared by the one kind provided according to the present invention The Hubbing method of 21-10Mn7Mo welding wires, including dip in coating treatment and with mold technique, wherein：Described has first with mold technique The step of secondary drawing：The wire rod of preset diameters size is sequentially passed through into solution treatment, pickling processes, coating treatment, drawing is dipped in, the One time total draft of drawing process is 56%, is derived from first silk material of preset diameters size；The step of second drawing Suddenly：First silk material is sequentially passed through into oil processing, bright annealing treatment, coating treatment, second drawing process are dipped in, drawing Total draft is 57%, is derived from the second silk material of preset diameters size；The step of third time drawing：By second silk material Sequentially pass through oil processing, bright annealing treatment, dip in coating treatment, third time drawing process, total draft of drawing is 75%, It is derived from the 3rd road silk material of preset diameters size.

Further,

The foregoing Hubbing method for preparing 21-10Mn7Mo welding wires, wherein：Described is set to mold technique：Draw for the first time The step of pulling out be：Φ 5.5- Φ 4.9- Φ 4.41- Φ 4.04- Φ 3.80- Φ 3.65, it is bright annealing to make annealing treatment, and always subtracts face Rate is 56%；The step of second drawing is：Φ 3.65- Φ 3.2- Φ 2.93- Φ 2.68- Φ 2.52- Φ 2.4, annealing It is bright annealing, total draft is 57%；The step of third time drawing is：Φ2.4-Φ2.06-Φ1.79-Φ1.55-Φ The total drafts of 1.35- Φ 1.2 are 75%.

21-10Mn7Mo welding wires prepared by foregoing method, wherein, the chemical composition quality % of the welding wire should meet：Carbon C≤0.10, silicon Si≤0.8, manganese Mn5.5-8.0, phosphorus P≤0.030, sulphur S≤0.020, nickel 9.0-11.0, chromium Cr 19.0- 22.0th, molybdenum Mo 0.5-2.0, or/and balance of iron Fe and inevitable impurity, or/and, Mn/Mo ratios control 7-7.5 it Between.

The present invention solves technical problem and takes following technical scheme to realize, according to a kind of 21- that the present invention is provided The purposes of 10Mn7Mo welding wires, the 21-10Mn7Mo welding wires are used for the welding of armour steel or steel alloy or quenched and tempered steel or dissimilar steel, Or/and, the automatic welding of armour steel or steel alloy or quenched and tempered steel or dissimilar steel, semi-automatic welding.

The present invention solves technical problem and takes following technical scheme to realize, a kind of application provided according to the present invention The 21-10Mn7Mo welding wire wire drawing machinees of aforementioned preparation process, including die device, wherein, described die device configures successively One die device, the second die device, the 3rd die device, the 4th die device, the 5th die device.

Foregoing 21-10Mn7Mo welding wires wire drawing machine, wherein, wire-drawing mechanism is set between adjacent die device.

Foregoing 21-10Mn7Mo welding wires wire drawing machine, wherein, the input configuration guiding mechanism of each die device.

Foregoing 21-10Mn7Mo welding wire wire drawing machinees, wherein, between adjacent die device, the input of die device, Configuration tension mechanism.

Foregoing 21-10Mn7Mo welding wire wire drawing machinees, wherein, the output end of each die device configures wire-drawing die list Unit；Wire-drawing lubrication unit is set between the output end of die device and the input of die device.

Foregoing 21-10Mn7Mo welding wire wire drawing machinees, wherein, described wire-drawing lubrication unit has hold that silk material passes through the One charging hole and the second charging hole, the first charging hole are located at die device input side, and the die device of the second charging hole is defeated Go out to hold side, be the work nest of accommodating lubricant between first charging hole and the second charging hole, for enter die device Silk material provide lubricant；Described wire-drawing die unit has cooling bath, for providing cooling water for mould；Wire-drawing die master Body is by the device of wire-drawing die kink in cooling bath；Wire-drawing die kink is used to hold wire-drawing die main body.

Foregoing 21-10Mn7Mo welding wire wire drawing machinees, wherein, the lubricant in the work nest of the accommodating lubricant is sodium Base lubricating agent.

The present invention solves technical problem and takes following technical scheme to realize, according to a kind of 21- that the present invention is provided 10Mn7Mo silk material structures, it includes 21-10Mn7Mo silk material bodies, wherein, the chemical composition quality % of silk material body should meet： Carbon C≤0.10, silicon Si≤0.8, manganese Mn5.5-8.0, phosphorus P≤0.030, sulphur S≤0.020, nickel 9.0-11.0, chromium Cr 19.0- 22.0th, molybdenum Mo 0.5-2.0, or/and balance of iron Fe and inevitable impurity.

Foregoing 21-10Mn7Mo silk material structures, wherein, Mn/Mo is than control between 7-7.5.

Foregoing 21-10Mn7Mo silk material structures, wherein, the silk material body outer surface is lubricant film layer, described lubrication Film layer is the film that sodium base lubricating agent is formed, and has dipping layer between silk material body surface and lubricant film layer.

Foregoing 21-10Mn7Mo silk material structures, wherein, described dipping layer is in silk material body by mineral salt base-material The carrier layer for carrying powdered lubricant (agent) that surface is formed.

Foregoing 21-10Mn7Mo silk materials structure, wherein, described coating is the coating with mineral salt as base-material.

Foregoing 21-10Mn7Mo silk material structures, wherein, coating solution meets：When water temperature reaches 90 DEG C, by 150-200 G/l ratio by mineral salt for base-material coating dissolve in water in all dissolve.

Foregoing 21-10Mn7Mo silk material structures, wherein, the formation of the dipping layer should meet processed silk material immersion Time is 5-6 minutes；Silk material is by after immersion, drying, drying temperature should meet 120 DEG C to 150 DEG C, and drying time should be greater than 3 Hour.

The present invention solves technical problem and takes following technical scheme to realize, the one kind provided according to the present invention is with preceding The weld seam of the 21-10Mn7Mo welding wires welding stated, including welding base metal, wherein, welding base metal is 675 steel or 685 steel, welding The heat affected area of fusion line side is organized as thick martensite and bainite and retained austenite；The metallographic structure of mother metal is Tempered sorbite；The metallographic structure of weld metal zone is austenite and ferrite.

The weld seam of foregoing 21-10Mn7Mo welding wires welding, wherein, welding condition is：Mother metal thickness of slab be 45mm or 5mm；Welding current：120-140A, weldingvoltage：20-24V, speed of welding：150-200mm/min, protective gas：95%Ar+ 5%CO2；Gas flow 15-20L/min.

The present invention has significant advantage and beneficial effect compared with prior art, is given in foregoing summary, and More specifically be given in embodiment, do not repeated herein.

Specific embodiment of the invention is shown in detail by following examples.

Specific embodiment of the invention is shown in detail by following examples and its accompanying drawing.

Brief description of the drawings

Fig. 1 is that the 5-linked tank wire drawing machine for preparing 21-10Mn7Mo welding wires overlooks face structural representation.

Fig. 1 a be prepare 21-10Mn7Mo welding wires 5-linked tank wire drawing machine face, sectional plane structural representation.

Fig. 2 is the dimensional structure diagram of die device in preparing 21-10Mn7Mo welding wires.

Fig. 3 is the silk material structural representation of drawing unit in preparing 21-10Mn7Mo welding wires.

Fig. 4 is the oblique Y types groove welding crack test of normal temperature, test specimen bevel shape and set of dimensions weldering schematic diagram.

Fig. 4 a are the A-A of Fig. 4 to sectional plane structural representation.

Fig. 4 b are the B-B direction sectional plane structural representations of Fig. 4.

Fig. 5 a be 21-10Mn7Mo weld 685 steel weld dimensions metallographic structure in, the fusion line of welding shows It is intended to, wherein the fusion line left side is heat affected area, fusion line the right is weld seam.

Fig. 5 b be 21-10Mn7Mo weld 685 steel weld dimensions metallographic structure in, heat affected area tissue show It is intended to, display is organized as thick martensite+bainite+retained austenite.

Fig. 5 c be 21-10Mn7Mo weld 685 steel weld dimensions metallographic structure in, the metallographic structure of mother metal Schematic diagram, display is organized as tempered sorbite.

Fig. 5 d be 21-10Mn7Mo weld 685 steel weld dimensions metallographic structure in, the metallographic group of weld metal zone Schematic diagram is knitted, display is organized as austenite+ferrite.

Fig. 6 a-6d are the metallographic structure schematic diagrames of the weld dimensions that existing correlation technique welds 685 steel, wherein, a Fusion line schematic diagram, the b for being welding are heat affected area schematic illustration of tissue, and c is the metallographic structure schematic diagram of mother metal, d weld metal zones Metallographic structure schematic diagram.

During Fig. 7 is the experiment that 21-10Mn7Mo is welded for robot, bead contour design sketch.

Fig. 8 is to prepare 21-10Mn7Mo welding wires drawing process route schematic diagram therein.

Specific embodiment

Below in conjunction with preferred embodiment, to specific embodiment, feature and its effect for being provided according to the present invention, specifically It is bright as after；For purposes of simplicity and clarity, the hereafter appropriate description for eliminating known technology, in case those are unnecessary thin Description of the section influence to the technical program.

Referring to shown in Fig. 1-8, a kind of Hubbing method and its middle process for preparing 21-10Mn7Mo welding wires, and its finished product And intermediate products.

First, the process route of drawing welding wire

Preparing the preamble technique of 21-10Mn7Mo welding wires wherein drawing process includes the technique of smelting ingot casting, and forging prepares forging Technique, the technique of gren rod of blank (also referred to as blank).

The technique unit that following patent applications are provided can preferably be quoted, whereby process obtain more preferable steel ingot, The intermediate products such as forging stock part, wire rod, for the drawing procedure of welding wire provides more preferable process conditions.

Prepare 21-10Mn7Mo welding wires smelting process therein, including be not limited to but can preferably the applicant it is disclosed Chinese patent application " 201310756138X, entitled 21-10Mn7Mo steel ingots and its smelting process ".It is possible thereby to be prepared The steel ingot of welding wire.

Prepare the method for 21-10Mn7Mo welding wires forging therein, the method for hot rolling include being not limited to but can preferably this Applicant's earlier application, but not yet disclosed following Chinese patent application：

Application number 2014108478543 prepares the forging method and its forging stock part of 21-10Mn7Mo welding wires；

Application number 2014108494813 prepares the blank and hot-rolling method of 21-10Mn7Mo welding wires.

It is possible thereby to obtain the forging stock part and wire rod for preparing welding wire.

Preparing 21-10Mn7Mo welding wires drawing process route therein can be as shown in Figure 8.

Knowable to the drawing process route shown in Fig. 8, before drawing welding wire, first have to apply Lubrication carrier to wire rod, Exactly dip in coating treatment.

Dip in coating treatment can allow the silk material surface in wire rod or processing procedure formed one layer it is coarse, porous, can adsorb and The carrier of powdered lubricant (agent) is carried, is brought in mould wire drawing powder (agent) into by this layer of carrier during wire drawing, so as to play lubrication Effect.

Dip in the method for coating treatment include being not limited to but can preferred the applicant's earlier application, but not yet disclose Following Chinese patent application：

Application number 2015102893481 prepares the Hubbing method of 21-10Mn7Mo welding wires and its dips in the technique list of coating treatment Unit.

The technique for preparing the wherein drawing of 21-10Mn7Mo welding wires, by taking the drawing process flow of 5.5 millimeters of wire rods of diameter as an example, It is following to illustrate：

5.5 wire rods of Φ → solution treatment → pickling →Dip inCoating → drawing Φ 3.55 → deoil → bright annealing

Dip inCoating → drawing Φ 2.4 → deoil → bright annealing →Dip inCoating → drawing Φ 1.2 → deoil → apply lubricating oil →Spooling→ inspection → packaging and storage

2nd, the material condition of drawing welding wire

The material composition unit unification of 2.1 citations is quality %.The amount being particularly described is not given, that value unit meets industry is general Regulation and usual usage, it will not go into details.

The Hubbing method of 21-10Mn7Mo welding wires is prepared, wherein, the chemical composition quality % of 21-10Mn7Mo wire rods should expire Foot：Carbon C≤0.10, silicon Si≤0.8, manganese Mn5.5-8.0, phosphorus P≤0.030, sulphur S≤0.020, nickel 9.0-11.0, chromium Cr 19.0-22.0, molybdenum Mo 0.5-2.0, or/and balance of iron Fe and inevitable impurity, or/and, Mn/Mo is than control in 7- Between 7.5.

This reasonable disposition molybdenum, manganese composition than effect include be prevented effectively from manganese metal asking in the easy scaling loss of reflow process Topic.

2.2 specifically describe the effect in stainless steel of metal molybdenums, manganese element, other compositions act as it is general understand, no Repeat again.

2.2.1. the effect of metal molybdenum Mo elements.

A. molybdenum is to the microscopic structure of stainless steel and the effect of heat treatment

Molybdenum as alloying element play the role of to steel and other alloys two it is important, that is, improve intensity and corrosion resistance.Molybdenum In being solid-solution in ferrite, austenite and carbide in steel, it is the element for reducing austenite phase field；It is microcosmic with refinement steel Crystal grain and reach the effect of refined crystalline strengthening, when molybdenum content is relatively low, compound cementite is formed with iron, carbon；When content is higher then The high rigidity alloy carbide 6-MoC/Mo2C of its own is formed, is the hardening constituent in steel；Molybdenum improves the quenching degree of steel, its effect It is strong compared with chromium, and it is slightly poorer than manganese；Molybdenum improves steel belt roof bolt stability.In the presence of single alloying element, increase steel belt roof bolt crisp Property；With chromium or manganese etc. and when depositing, molybdenum reduces or restrains the temper brittleness caused by other elements again.

B. effect of the molybdenum to the mechanical property of stainless steel

Molybdenum has solution strengthening effect to ferrite, and Precipitation phase can also be formed in stainless steel, improves the intensity of steel, together When also improve the stability of carbide, so as to improve the intensity of steel；Molybdenum rises to the ductility and toughness and wearability that improve steel To advantageous effect；Improve the softening after working hardening and recovery temperature and recrystallization temperature due to molybdenum, and improve iron strongly The creep resistance of ferritic, effectively suppresses aggregation of the cementite under, promotes the precipitation of alloy carbide, thus hot as steel is improved The particularly effective alloying element of epistasis, molybdenum can improve the mechanical behavior under high temperature of austenitic stainless steel, such as persistently, the property such as creep Can obtain larger improvement.

C. effect of the molybdenum to the physical chemistry and processing performance of stainless steel

Can be passivated steel surface in reproducibility acid and strong oxidizing property salting liquid, therefore molybdenum can generally improve the anti-of steel Corrosion energy, prevents spot corrosion of the steel in chloride solution；Deteriorate the inoxidizability of steel during molybdenum content (the mass % of ＞ 3) higher； Steel containing molybdenum no more than 8 mass % can still be forged, rolled, but content it is higher when, steel increases to hot worked resistance of deformation.

In summary, molybdenum is the element to form and stablize ferrite and expand ferrite phase region.

But, the addition of molybdenum increases the high temperature hot deformation resistance of steel, is usually present a small amount of delta ferrite in steel in addition thus contains The hot-workability ratio of molybdenum stainless steel is poor without molybdenum steel, and molybdenum content is higher, and hot-working character is worse；Molybdenum also promotes austenite Intermetallic phase in stainless steel, such as σ phases, κ phases, and the equal precipitations of Laves, corrosion resistance and mechanical property to steel can all be produced Adverse effect, particularly results in plasticity, and toughness declines.

It is the austenite structure for making austenitic stainless steel keep single, with the increase of molybdenum content in steel, austenitic formation The content of element also will be improved accordingly, to keep the balance in steel between ferrite and austenite former, therefore this case to exist In austenitic stainless steel plus after molybdenum, the content of manganese is also accordingly improved.Typically understand the austenite former refer to nickel, nitrogen, Manganese etc..

2.2.2 the control of manganese metal Mn elements

Manganese is similar to nickel for the effect of austenite.But the important function of manganese does not lie in form austenite, but it is it The critical quenching rate of steel is reduced, the stability of austenite is increased in cooling, suppress the decomposition of austenite, make to be formed under high temperature Austenite be maintained normal temperature.

In terms of the decay resistance of steel is improved, less, experiment shows for the effect of manganese, such as the manganese content in steel from 0 to 10.4 mass % change, and can not make decay resistance of the steel in air with acid that obvious change occurs.

Further, addition Mn can make more nitrogen dissolve in austenite, and nitrogen is strong austenite former, containing 0.25 matter The nitrogen of % is measured, the nickel of the ability equivalent to 7.5 mass % of austenite is formed.

The content of manganese in welding wire is improved, in addition to deoxidation, moreover it is possible to and vulcanization conjunction generates manganese sulfide (MnS), and quilt Remove (i.e.：Desulfurization), therefore the tendency of the fire check caused by sulphur can be reduced, while the intensity of welding wire can be improved.But manganese contains Amount needs effectively control, when the too high levels of manganese easily make material solidification or applied at elevated temperature process in which materials tissue is thick, increases The fragility of material.

2.3. this case 21-10Mn7Mo and material chemical composition quality % of prior art is contrasted, and is shown in Table 1.

Table 1：Two kinds of chemical compositions of material

Experiment shows, suitably determines addition, forms new alloy, and after such alloy is made welding wire, its intensity can be obvious Improve.

General to understand, the addition of molybdenum and manganese can increase certain difficulty to forging process.Addition including reason molybdenum and manganese The intensity of steel is improved, plasticity reduction, thus, the processing of cold working operation is more difficult from.

3rd, the dipping layer process in drawing welding wire,

Forging stock part treatment after conducting forging processing forms gren rod, into the drawing process unit for dipping in coating treatment.

3.1 dipping layer process

3.1.1 the preparation of coating solution

Coating of the coating that the dipping layer process is quoted preferably with mineral salt as base-material, with mineral salt as base-material Coating should be able to deposit to form crystal structure layer in metal surface, that is, form Lubrication carrier, i.e. dipping to wire rod coating Layer, dipping layer is to deposit that to be formed one layer is coarse and the strong crystal of adhesive force in metal surface by the mineral salt base-material Structure, it is possible thereby to effectively improve adhesive force of the lubriation material in metal surface.

When water temperature reaches 90 DEG C, during mineral salt dissolved in into water for the coating of base-material in 150-200 g/l of ratio, and It is stirred continuously to the coating and all dissolves.

3.1.2. the soak time in dipping layer is 5-6 minutes.

3.1.3 dried after soaking, 120 DEG C to 150 DEG C of drying temperature, drying time more than 3 hours.

Thus, on the one hand promote Steel Wire Surface to form the thick film of carrier, on the other hand can also realize removing the skill of pickling hydrogen embrittlement Art effect.

So far, Steel Wire Surface can form one layer of carrier that is coarse, porous, can adsorbing and carry powdered lubricant (agent), during wire drawing Wire drawing powder (agent) is brought into wire-drawing die by this layer of carrier, so as to play a part of lubrication.

This coating with mineral salt as base-material can be commercially available product, or be prepared by general prior art.

3.1.4 technological requirement：Coating to be stained with it is even, cement, dry, dry thoroughly.

4th, in drawing welding wire with mold technique, including the chemical composition of 21-10Mn7Mo wire rods determination, wire drawing passage It is determined that, the determination of intermediate annealing, the determination of silk material chemical composition after drawing, the determination of total draft, wherein,

The preferred 5-linked tank wire drawing machine of 21-10Mn7Mo welding wires is prepared, referring to Fig. 1." 5-linked tank " refers to five mould dresses of configuration Put, realize five drawing process of passage.The drawing of each passage dips in coating treatment via die device 2-1 to 2-5, realization And drawing.

Described 5-linked tank wire drawing machine, with output line apparatus 1-1, reclaims line apparatus 1-2, completes the folding and unfolding of silk material. The first die device 2-1, the second die device 2-2, the 3rd mould dress are configured between output line apparatus and recovery line apparatus successively Put 2-3, the 4th die device 2-4, the 5th die device 2-5.

Guiding mechanism and tension mechanism are configured on the 5-linked tank wire drawing machine, for realizing guiding silk material from output line apparatus Steadily be oriented to each die device, this can by prior art, it will not go into details.

Referring to Fig. 1, wire-drawing mechanism 3, the input 2-n-1 configurations of each die device are set between adjacent die device Guiding mechanism 2-n-14, between adjacent die device, the input 2-n-1 of die device, configuration tension mechanism 2-n-15.This Can by prior art, it will not go into details.

The output end 2-n-2 of each die device, configuration wire-drawing die unit 2-n-26；The output end 2-n- of die device Wire-drawing lubrication unit 2-n-3 is set between 2 and the input 2-n-1 of die device, and described wire-drawing lubrication unit has appearance silk The the first charging hole 2-n-31 and the second charging hole 2-n-32, the first charging hole 2-n-31 that material passes through are located at die device input Side, the die device output end side of the second charging hole 2-n-32, the first charging hole 2-n-31 and the second charging hole 2-n- It is the work nest 2-n-30 of accommodating lubricant between 32, for the silk material into die device provides lubricant；Described wire drawing die Tool unit 2-n-26 has cooling bath 2-n-260, for providing cooling water for mould；2-n-261 is by drawing for wire-drawing die main body The device of silk mould kink 2-n-262 is in cooling bath；Wire-drawing die kink is responsible for holding wire-drawing die main body, evenhanded.

So far realized whereby by the silk material construction of drawing cell processing.

4.1 lubricants are selected

Described lubricant can be commercially available, preferably dry type sodium base lubricating agent.Before the sodium base lubricating agent coordinates State the dipping coating with mineral salt as base-material.Thus the measure for lubricating is so that silk material surface forms the layer structure of sodium base lubricating film Make, the Lubrication carrier layer construction formed with the technique of dipping layer forms important matching.

Thus adhesive force of the lubriation material in metal surface can further be effectively improved.By drawing material and wire-drawing die it Between form the lubricating film of more preferable effect, and remaining lubricating film is easier cleaning.

Moreover, because 21-10Mn7Mo welding wire intensity is high, drafts big, quote sodium base lubricating agent and coordinate with mineral salt For the paint coatings of base-material are used, following index can be realized through the silk material after drawing：

When melting range is 220 DEG C~260 DEG C, draw speed is 150m/min, during tensile strength >=1200MPa, silk material surface Performance is still good, is capable of achieving total draft >=75%.

4.1.1 the structure of the silk material of drawing unit

So far the structure of the silk material 4-1 of drawing unit is formed, it includes 21-10Mn7Mo silk material bodies, wherein, silk material sheet The chemical composition quality % of body should meet：Carbon C≤0.10, silicon Si≤0.8, manganese Mn5.5-8.0, phosphorus P≤0.030, sulphur S≤ 0.020th, nickel 9.0-11.0, chromium Cr 19.0-22.0, molybdenum Mo 0.5-2.0, or/and balance of iron Fe are miscellaneous with inevitable Matter, or/and, Mn/Mo is than control between 7-7.5.

It is lubricant film layer 4-1-2 referring to Fig. 3 silk material body 4-1-0 outer surfaces, described lubricant film layer is sodium base lubricating agent The film of formation, has dipping layer 4-1-1 between silk material body surface and lubricant film layer, and described dipping layer is by mineral salt One layer of carrier layer that is coarse, porous, can adsorbing and carry lubriation material that base-material is formed in silk material body surface.

4.2 passages with each drawing of mold technique are set to five times, and wire drawing is described by taking 5.5 millimeters of wire rods of diameter as an example with mould Be set to as follows, diameter units：Millimeter.

First time drawing：By the wire rod of preset diameters size sequentially pass through solution treatment, pickling processes, dip in coating treatment, Drawing, total draft of first time drawing process is 56%, is derived from first silk material of preset diameters size.

The total drafts 56% of Φ 5.5- Φ 4.9- Φ 4.41- Φ 4.04- Φ 3.80- Φ 3.65 (bright annealing).

Second drawing：First silk material is sequentially passed through into oil processing, bright annealing treatment, coating treatment, second is dipped in Secondary drawing process, total draft of drawing is 57%, is derived from the second silk material of preset diameters size.

The total drafts 57% of Φ 3.65- Φ 3.2- Φ 2.93- Φ 2.68- Φ 2.52- Φ 2.4 (bright annealing)

Third time drawing：Second silk material is sequentially passed through into oil processing, bright annealing treatment, coating treatment, the 3rd is dipped in Secondary drawing process, total draft of drawing is 75%, is derived from the 3rd road silk material of preset diameters size.

The total drafts 75% of Φ 2.4- Φ 2.06- Φ 1.79- Φ 1.55- Φ 1.35- Φ 1.2.

4.2.1 specifically describe

See Fig. 1-1a, selecting will describe in each drawing the deformation process that five passages complete to the drawing of silk material：

The silk material of preset diameters size is exported from actinobacillus device 1-1, silk material completes silk by the first die device 2-1 Material draws from the Φ 5.5mm or the Φ 3.65mm of second drawing or the Φ 2.4mm of third time drawing of first time drawing to first time The Φ 4.9mm or the Φ 3.2mm of second drawing or the first time tube reducing of the Φ 2.06mm of third time drawing for pulling out；

Silk material after first time tube reducing is by wire-drawing mechanism and guiding mechanism, the tension force between die device and die device The correction of mechanism, positioning imports the second die device；Silk material completes silk material from Φ 4.9mm or Φ by the second die device Second tube reducing of 3.2mm or Φ 2.06mm to Φ 4.41mm or 2.93mm or 1.79mm；

……

By that analogy, when silk material is by five die devices, silk material from Φ 3.80mm or Φ 2.52mm or Φ is completed 5th tube reducing of 1.35mm to Φ 3.65mm or Φ 2.4mm or Φ 1.2mm, is finally wound up above recovery line apparatus 1-2 The diameter of silk material meets preset value.

Drawing each time, by after 5 passage drawings, then by the coating and lubricant of the silk material surface residual that deoils, removes； Bright annealing, to eliminate processing hardening, improves the plasticity of silk material again, and total draft of silk material meets preset value；Then again in silk Dip in coating and carry out drawing next time in material surface.

Thus the dipping layer process that the setting combination this case of wire drawing with mould is provided can effectively improve silk material drawing effect, and Silk material can be effectively formed lubricating layer in drawing process, persistently keep the lubrication circumstances on silk material surface, be that welding wire surface quality is carried For ensureing.

Described die device, with lubricant tank 2-n-13

This case 21-10Mn7Mo welding wire purposes is the welding of armour steel or steel alloy or quenched and tempered steel or dissimilar steel, including dress The automatic welding of first steel or steel alloy or quenched and tempered steel or dissimilar steel, semi-automatic welding.

5th, the Performance comparision of this case 21-10Mn7Mo welding wires and existing welding wire

5.1 comparing in terms of chemical composition and mechanical property

21-10Mn7Mo stainless steel welding sticks be added on the basis of existing welding wire H1Cr21Ni10Mn6 Mo and Mn develop and Into.It is molten when the deposited metal composition and welding rod that welding wire is ensure that on the basis of removing metal welding loss are welded after adding Mo The uniformity of metallisation.Metal molybdenum can be with crystal grain thinning, the toughness, the height that improve recrystallization temperature, significantly improve steel simultaneously Warm intensity and croop property.Therefore it is the important component of heat-resisting, anti-corrosion various structural steel that molybdenum becomes；Manganese contains in raising welding wire Amount, in addition to deoxidation, moreover it is possible to vulcanization symphysis into manganese sulfide (MnS), and be removed (desulfurization) therefore can reduce and be caused by sulphur Fire check tendency.The chemical composition of two kinds of welding wires see the table below 6

6 two kinds of chemical compositions of welding wire of table

It is general to understand, automatically or semi-automatically weld higher for the intensity requirement of welding wire, such as the too low meeting of welding wire intensity or mistake , during wire feed is welded or there is fracture of wire or occurs killing the phenomenon such as curved in height, and wire feed has some setbacks when causing welding.21- 10Mn7Mo welding wires effectively increase the intensity of welding wire, the requirement that satisfaction is automatically or semi-automatically welded.Two kinds of welding wire mechanical property ratios Relatively it is shown in Table 7.

7 two kinds of comparings of welding wire mechanical property of table

The mechanical property of the explanation this case 21-10Mn7Mo welding wires of table 7 is substantially superior.

The mechanical property of 5.2 deposited metals compares

It is general to understand, when welding wire is used for mother metal mechanical property material higher, such as armour steel, the power of the deposited metal of welding wire Performance requirement is learned also accordingly to improve.

The welding of armour steel is applied to due to this case welding wire, thus it is also higher to the mechanical property requirements of deposited metal, Welding wire is used for the mechanical performance index requirement of the deposited metal of armour steel, is shown in Table 8.

Table 8：

Tensile strength sigma b (MPa)	Elongation percentage δ 5 (%)	Normal temperature Impact energy Ak v (J)
			≥550	≥25	≥72

The mechanical property of the deposited metal of 21-10Mn7Mo welding wires disclosure satisfy that above-mentioned requirements, have welding wire and this case 21- The mechanical property of 10Mn7Mo welding wire deposited metals compares, and is shown in Table 9.

Experiment condition：Welding wire soldering test is welded using stainless steel argon-rich mixed gas.

Table 9：The mechanical property of deposited metal compares

Table 9 illustrates that this case tensile strength and normal temperature ballistic work are all significantly improved than the index of prior art.

The oblique Y types groove welding crack test of 5.3 normal temperature

In the presence of Thermal Cycle, weld dimensions metal is changed due to tissue, performance, planted agent's masterpiece With and diffusible hydrogen influence, main weld defect is that cold crack possible occur.

The test method for evaluating weld metal and heat affected area cold crack tendency is now widely used in, according to existing with Chinese state Family's standard, with oblique Y types groove welding crack test method, crackle tendency is weighed by gauging surface crackle and section crack rate.

Welding condition：Use welding wire 21-10Mn7Mo and H1Cr21Ni10Mn6；

Gage of wire Ф 1.2mm；Welding current 120-140A；Weldingvoltage 20-24V；Speed of welding 150-200mm/ min；Protective gas 95%Ar+5%CO2；Gas flow 15-20L/min；DC reverse connection, 20 DEG C of environment temperature.

Welding equipment：Commercially available gas-shielded welder.

Sample is prepared and test method：Test specimen groove is welded with being machined referring to Fig. 4 shapes and set of dimensions.Postwelding 48 is small When, two kinds of welding wires of observation weld the face crack rate and section crack rate of same material with welding procedure of the same race, and result of the test is shown in Table 10 below.

Table 10 is illustrated, for welding 675 steel of high rigidity and 603 steel of middle hardness, two kinds of face crack rate water of welding wire It is flat suitable, but in terms of section crack rate, this case 21-10Mn7Mo welding wires will be substantially better than existing H1Cr21Ni10Mn6 welderings Silk.

Table 10

5.4. banjo fixing butt jointing mechanical property test contrast

Carry out banjo fixing butt jointing welding to the steel of glass hard steel 675 and 685 respectively with two kinds of welding wires, thickness of slab is 45mm and 5mm.Weldering Connect technique：Welding current：120-140A, weldingvoltage：20-24V, speed of welding：150-200mm/min, protective gas：95% Ar+5%CO2；Gas flow 15-20L/min；And take impact specimen and contrasted, result of the test see the table below 11.

Table 11

Table 11 is illustrated, when two kinds of welding wires weld 675 steel, the impact property of commissure is suitable, but the impact of heat affected area Performance this case 21-10Mn7Mo welding wires are substantially better than existing H1Cr21Ni10Mn6 welding wires；When welding 685 steel, either hot shadow The impact property for ringing area or commissure is all that 21-10Mn7Mo welding wires are substantially better than H1Cr21Ni10Mn6 welding wires.

5.5 with two kinds of welding wires to 685 steel banjo fixing butt jointing weld seams, heat affected area, the metallographic structure of mother metal comparing.

Fig. 5 a-5d are the metallographic structures of the weld dimensions that 21-10Mn7Mo welds 685 steel, and Fig. 5 a are melting for welding Zygonema, the fusion line left side is heat affected area, and fusion line the right is weld seam.Fig. 5 b for heat affected area be organized as thick martensite+ Bainite+retained austenite.Fig. 5 c are the metallographic structure of mother metal, are tempered sorbite.Fig. 5 d are the metallographic structure of weld metal zone, are Austenite+ferrite.

Fig. 6 a-6d H1Cr21Ni10Mn6 weld the metallographic structure of the weld dimensions of 685 steel, and Fig. 6 a are welding Fusion line, the fusion line left side is heat affected area, and fusion line the right is weld seam.Fig. 6 b are organized as thick martensite for heat affected area + bainite+retained austenite.Fig. 6 c are the metallographic structure of mother metal, are tempered sorbite.Fig. 6 d are the metallographic structure of weld metal zone, It is austenite+ferrite.

Can be seen that the metallographic structure at each position that two kinds of welding wires are welded is essentially identical by Fig. 5 a-5d and Fig. 6 a-6d.Simply The martensitic structure of the heat affected area welded with H1Cr21Ni10Mn6 is thicker, has a small amount of size larger in the tissue of weld seam Field trash.

And the crystal grain of the weld seam welded with 21-10Mn7Mo welding wires is more tiny.

The compatibility test of 5.6 robots

5.6.1 experimental condition：

Use welding wire 21-10Mn7Mo, gage of wire Ф 1.2mm, welding current 140-180A, weldingvoltage 20-24V, weldering Meet speed 150-200mm/min, protective gas 95%Ar+5%CO₂；Gas flow 15-20L/min, welding equipment selection is commercially available Full-automatic welding machine.

5.6.2 test method：

Weld 603 each 1 couple of steel plate thickness 45mm and G4 steel plate thickness 15mm, butt welding, recorded during welding welding parameter, Wire feed state, splashing situation, arc stability, appearance of weld and welding wire surface state.

5.6.3 conclusion (of pressure testing)：

(1) welding parameter in given welding condition scope, i.e., join by the welding for being used with H1Cr21Ni10Mn6 welding wires Number is identical.

(2) the uniform and stable non-jitter of wire feed state.

(3) the small, fume amount that splashed in welding process is relatively low, better than use H1Cr21Ni10Mn6 welding wires.

(4) defect such as appearance of weld good, welding wire surface is smooth, impulse- free robustness, pit, cut.The profile below figure 7 of weld seam It is shown.

After the preferred embodiment for describing in detail, being familiar with this skilled worker can be apparent from, and not take off this case institute State that claim is lower with spirit can be carried out various change and change, and the present invention is also not only restricted to lift implementation in specification The implementation method of example.

Claims (10)

1. it is a kind of to prepare the Hubbing method of 21-10Mn7Mo welding wires, including dip in coating treatment and with mold technique, wherein：Described matches somebody with somebody The step of mold technique has first time drawing：The wire rod of preset diameters size is sequentially passed through into solution treatment, pickling processes, dipping Layer treatment, drawing, total draft of first time drawing process is 56%, is derived from first silk material of preset diameters size； The step of second drawing：By first silk material sequentially pass through oil processing, bright annealing treatment, dip in coating treatment, second Drawing process, total draft of drawing is 57%, is derived from the second silk material of preset diameters size；The step of third time drawing Suddenly：Second silk material is sequentially passed through into oil processing, bright annealing treatment, coating treatment, third time drawing process are dipped in, drawing Total draft is 75%, is derived from the 3rd road silk material of preset diameters size.

2. the Hubbing method of 21-10Mn7Mo welding wires is prepared as claimed in claim 1, wherein：Described is set with mold technique For：The step of first time drawing is：Φ 5.5- Φ 4.9- Φ 4.41- Φ 4.04- Φ 3.80- Φ 3.65, it is light to make annealing treatment Annealing, total draft is 56%；The step of second drawing is：Φ3.65-Φ3.2-Φ2.93-Φ2.68-Φ2.52-Φ 2.4, it is bright annealing to make annealing treatment, and total draft is 57%；The step of third time drawing is：Φ2.4-Φ2.06-Φ1.79- The total drafts of Φ 1.55- Φ 1.35- Φ 1.2 are 75%.

3. the 21-10Mn7Mo welding wires that prepared by method as claimed in claim 1 or 2, wherein, the chemical composition matter of the welding wire Amount % should meet：Carbon C≤0.10, silicon Si≤0.8, manganese Mn5.5-8.0, phosphorus P≤0.030, sulphur S≤0.020, nickel 9.0- 11.0th, chromium Cr 19.0-22.0, molybdenum Mo 0.5-2.0, or/and balance of iron Fe and inevitable impurity, or/and, Mn/Mo Than controlling between 7-7.5.

4. the purposes of 21-10Mn7Mo welding wires as claimed in claim 3, the 21-10Mn7Mo welding wires are used for armour steel or alloy The welding of steel or quenched and tempered steel or dissimilar steel, or/and, the automatic welding of armour steel or steel alloy or quenched and tempered steel or dissimilar steel, half Automatic welding.

5. a kind of 21-10Mn7Mo welding wire wire drawing machinees of the preparation method of application claim 1 or 2, including die device, wherein, institute The die device stated configures the first die device, the second die device, the 3rd die device, the 4th die device, the 5th successively Die device；Or/and, wire-drawing mechanism is set between adjacent die device, or/and, the input configuration of each die device Guiding mechanism, or/and, between adjacent die device, the input of die device configures tension mechanism；Or/and, each mould Have the output end of device, configure wire-drawing die unit；Set between the output end of die device and the input of die device and drawn Silk lubrication unit, or/and, described wire-drawing lubrication unit has the first charging hole and the second charging hole that appearance silk material passes through, the One charging hole be located at die device input side, the die device output end side of the second charging hole, first charging hole and It is the work nest of accommodating lubricant between second charging hole, for providing lubricant for the silk material into die device；Described Wire-drawing die unit has cooling bath, for providing cooling water for mould；Wire-drawing die main body by wire-drawing die kink dress Put in cooling bath；Wire-drawing die kink is used to hold wire-drawing die main body.

6. it is as claimed in claim 5 to prepare 21-10Mn7Mo welding wire wire drawing machinees, wherein, in the work nest of the accommodating lubricant Lubricant be sodium base lubricating agent.

7. a kind of 21-10Mn7Mo silk materials structure, it includes 21-10Mn7Mo silk material bodies, wherein, the chemical composition of silk material body Quality % should meet：Carbon C≤0.10, silicon Si≤0.8, manganese Mn5.5-8.0, phosphorus P≤0.030, sulphur S≤0.020, nickel 9.0- 11.0th, chromium Cr 19.0-22.0, molybdenum Mo 0.5-2.0, or/and balance of iron Fe and inevitable impurity, or/and, Mn/Mo Than controlling between 7-7.5；

The silk material body outer surface is lubricant film layer, the film that described lubricant film layer is formed for sodium base lubricating agent, in silk material sheet There is dipping layer between body surface face and lubricant film layer.

8. 21-10Mn7Mo silk materials structure as claimed in claim 7, wherein, described dipping layer is existed by mineral salt base-material The carrier layer for carrying powdered lubricant (agent) that silk material body surface is formed；Or/and, described coating is with mineral salt as base-material Coating；Or/and, coating solution meets：When water temperature reaches 90 DEG C, in 150-200 g/l of ratio by mineral salt be base-material Coating dissolve in water in all dissolve；Or/and, the formation of the dipping layer should meet processed silk material soak time for 5-6 Minute；Silk material is by after immersion, drying, drying temperature should meet 120 DEG C to 150 DEG C, and drying time should be greater than 3 hours.

9. a kind of weld seam of the 21-10Mn7Mo welding wires welding described in use claim 3, including welding base metal, wherein, welding is female Material is 675 steel or 685 steel, and the heat affected area of the fusion line side of welding is organized as thick martensite and bainite and remnants Austenite；The metallographic structure of mother metal is tempered sorbite；The metallographic structure of weld metal zone is austenite and ferrite.

10. the weld seam that 21-10Mn7Mo welding wires as claimed in claim 9 are welded, wherein, welding condition is：Mother metal thickness of slab It is 45mm or 5mm；Welding current：120-140A, weldingvoltage：20-24V, speed of welding：150-200mm/min, protects gas Body：95%Ar+5%CO2；Gas flow 15-20L/min.