Welding rod stainless steel wire production technology
Technical field
The present invention relates to a kind of stainless steel wire production technology, more particularly, to a kind of production technology of welding rod stainless steel wire,
Belong to stainless steel wire technical field.
Background technology
Welding rod is most conventional welding materials, and conventional welding rod is made of core wire and coating two parts --- outside metal core wire
Coating (coating) is wrapped, welding rod type is different, and core wire is also different;The ingredient of the metal core of core wire, that is, welding rod, core wire is straight
The ingredient and performance for affecting weld metal are connect, core wire is usually a steel wire with certain length and diameter.
When welding, there are two effects for core wire:First, conduction welding current, generates electric arc and converts electrical current into thermal energy, second is that
Core wire fusing itself fuses to form weld seam as filling metal with liquid base metals;When welding rod welds, core wire metal becomes whole
A part for a weld metal, so the chemical composition of core wire, directly affects the quality of weld seam.
Stainless steel electrode can be divided into straight-chromiun stainless steel welding rod and chromium nickel stainless steel welding rod, and straight-chromiun stainless steel has centainly anti-corrosion
(Oxidizing acid, organic acid, cavitation erosion)Heat-resisting and corrosion resisting property is typically chosen as the equipment and materials such as power station, chemical industry, oil.But chromium
Solderability is poor under normal circumstances for stainless steel, it should be noted that welding procedure, heat treatment condition and the suitable welding rod of selection.Chromium nickel is not
The steel electrode that becomes rusty has good corrosion resistance and inoxidizability, is widely used in chemical industry, chemical fertilizer, oil, medical machinery manufacture.It is anti-
It only being generated due to heating and is corroded between eyeball, welding current should not be too big, and more less than carbon steel 20% or so, electric arc should not mistake
Long, interlayer rapid cooling is advisable with string(er) bead.
Since the resistance value of the core wire of stainless steel electrode is bigger than carbon steel, thermal conductivity is poorer than carbon steel, and the table of stainless steel molten drop
Face tension is big, thus its molten drop is based on bulky grain short circuiting transfer, so with the extension of weld interval in the welding process
It is increased with temperature, it is not ideal enough just to will produce welding technological properties;General stainless steel electrode in the welding process, electrode coating
Rubescent, the burn-off rate of welding rod becomes faster suddenly, and the droplet transfer is not easy to control, and electric arc moves swiftly, and appearance of weld is deteriorated;Rubescent welding rod
Coating cracks after cooling, causes welding rod that can not be continuing with and causes very big waste, and stainless steel electrode higher price, therefore reduces
Its higher operating costs;
Therefore it needs to produce the covered electrode with high adhesion, in order to enable coating is preferably bonded in stainless steel wire
On, other than improving the composition of coating, it is also necessary in the preparation process of stainless steel wire stainless steel wire drawing is more uniformly distributed,
Surface consistent degree is more uniformly distributed, so that it can be more closely when being combined with coating;But conventional stainless steel wire production
Apply in the process due to lacking constant tension, by it is different pull will cause after power whole steel wire various pieces by
Power is inconsistent, causes its uniformity poor, influences the consistency after it is combined with coating.
Invention content
The purpose of the present invention is to overcome the above shortcomings and to provide a kind of coatings and stainless steel wire to be tightly combined firm welding rod
Stainless steel wire production technology.
The object of the present invention is achieved like this:
A kind of welding rod stainless steel wire production technology, the technique include following steps:
Step 1, the drying of online epithelium;
Wire rod derived from paying out machine coats film agent after constant tension device keeps constant tension, in wire surface, then
Dried in 120 ~ 140 DEG C of baking oven;
Step 2, multi pass drawing;
Wire rod after epithelium drying in step 1 is imported into continuous drawing 5 ~ 6 times on straight drawing machine;
Wire rod after step 3, drawing carries out surface cathodic pickling;
Step 4, surface-brightening processing;
Wire rod after cathodic pickling in step 3 is imported and carries out surface-brightening heat treatment in heat-treatment furnace;
Wire rod after heat treatment is carried out water cooling, washes and dry by step 5;
Step 6, powder are drawn;
Wire rod is subjected to single pass drawing by entering after powder box in mold;
Powder in powder box be odium stearate, calcium stearate and barium stearate mixture;Core surface in diaphragm capsule
It is densely covered with particles of silicon carbide, to provide its wearability, the draft of drawing is 8 ~ 10%;
Constant tension device in step 1 includes bottom plate, and the bottom plate center is equipped with a central shaft vertically upward, described
It is fixed with a reel on the bottom surface of bottom plate, a friction plate is fixed on the top surface of the bottom plate, the friction plate is set in center
On axis, there is a supporting plate to be set on central shaft, and supporting plate activity is positioned on friction plate, above-mentioned supporting plate and central shaft it
Between be provided with bearing, and the bearing holder (housing, cover), loaded on central shaft, a pressing plate is pressed on the bearing;It is equipped at the top of the central shaft
One cover board, is set with spring on the central shaft, and central shaft is between pressing plate and cover board, two on the side wall of the supporting plate
Be connected to oblique connection strap, outlet board be installed on the oblique connection strap, wire rod on reel after pass through wearing on outlet board
It draws in hole;
Heat-treatment furnace in step 4 includes more boiler tubes being connected in heating device, and boiler tube is held on heating dress
In the arc groove of refractory brick top surface in setting, the heating tube being arranged in the heating device is located at the top of boiler tube;Intermediate gas tank
It is connected with ammonia destruction furnace, and intermediate gas tank is connected with every boiler tube respectively by more branch pipes;Thus will be in ammonia destruction furnace
The nitrogen and hydrogen of generation import in boiler tube, and nitrogen is inert gas, serve as protective gas, hydrogen the open end of boiler tube with
Extraneous oxygen combustion, to stop that oxygen is carried out as in boiler tube, external screw thread, resistance to mill tube are provided on the outer wall of the open end of boiler tube
Inner wall be provided with internal thread, resistance to mill tube is spun on by inside spin on the external screw thread of boiler tube, and the center of resistance to mill tube be provided with it is logical
Cross the perforation of wire rod.
Compared with prior art, the beneficial effects of the invention are as follows:
Using after constant tension device in the preceding road unwrapping wire process of the present invention, stainless steel wire obtains constant in process of production
Tension, therefore it no matter in drawing or other processes, stress is more uniformly distributed, and ensure that the consistency of stainless steel wire so that
It, which is subsequently combined with coating, is more uniformly distributed reliably;Meanwhile in heat treatment procedure by ammonolysis craft gas to stainless in boiler tube
Steel wire is protected, and the generation of deposit is avoided, and improves the treatment effect of stainless steel wire.
Description of the drawings
Fig. 1 is the structural schematic diagram of the constant tension device in a kind of welding rod stainless steel wire production technology of the present invention.
Fig. 2 is the structural schematic diagram of the heat-treatment furnace in a kind of welding rod stainless steel wire production technology of the present invention.
Wherein:
Bottom plate 101, central shaft 102, reel 103, friction plate 104, supporting plate 105, pressing plate 106, bearing 107, cover board
108, spring 109, oblique connection strap 110, outlet board 111;
Boiler tube 1, heating device 2, solution heat treatment slot 3, intermediate gas tank 4;
Heating tube 2.1.
Specific implementation mode
Referring to Fig. 1, a kind of welding rod stainless steel wire production technology of the present invention, the technique includes following steps:
Step 1, the drying of online epithelium;
Wire rod derived from paying out machine coats film agent after constant tension device keeps constant tension, in wire surface, then
Dried in 120 ~ 140 DEG C of baking oven;
Step 2, multi pass drawing;
Wire rod after epithelium drying in step 1 is imported into continuous drawing 5 ~ 6 times on straight drawing machine;
Wire rod after step 3, drawing carries out surface cathodic pickling;
Step 4, surface-brightening processing;
Wire rod after cathodic pickling in step 3 is imported and carries out surface-brightening heat treatment in heat-treatment furnace;
Wire rod after heat treatment is carried out water cooling, washes and dry by step 5;
Step 6, powder are drawn;
Wire rod is subjected to single pass drawing by entering after powder box in mold;
Powder in powder box be odium stearate, calcium stearate and barium stearate mixture;Core surface in diaphragm capsule
It is densely covered with particles of silicon carbide, to provide its wearability, the draft of drawing is 8 ~ 10%;
Using the mixed powder of above-mentioned three kinds of materials as powdered lubricant after, after enabling to its drawing densification be attached to steel wire
The surface of wire rod, without floating powder, ensure welding rod production process in without dust pollution, ensure tangential velocity while, coating with it is stainless
High adhesion between steel electrode.
Constant tension device in step 1 includes bottom plate 101, and 101 center of the bottom plate is equipped with a center vertically upward
Axis 102 is fixed with a reel 103 on the bottom surface of the bottom plate 101, a friction plate is fixed on the top surface of the bottom plate 101
104, the friction plate 104 is set on central shaft 102, has a supporting plate 105 to be set on central shaft 102, and supporting plate 105
Activity is positioned on friction plate 104, and bearing 107, and 107 sets of the bearing are provided between above-mentioned supporting plate 105 and central shaft 102
Loaded on central shaft 102, a pressing plate 106 is pressed on the bearing 107;102 top of the central shaft is equipped with a cover board 108,
It is set with spring 109 on the central shaft 102, and central shaft 102 is between pressing plate 106 and cover board 108, the supporting plate
Two are connected to oblique connection strap 110 on 105 side wall, and outlet board 111, stainless steel wire winding are equipped on the oblique connection strap 110
It is drawn by the perforation on outlet board 111 after on reel 103;
In use, supporting plate 105 is pressed together on friction plate 104 by the elastic force provided by spring 109, due to spring 109
The elastic constant of offer, therefore the frictional force between supporting plate 105 and friction plate 104 is constant, and when stainless steel wire is pullled,
Power balances each other with frictional force, therefore its constant tension, is conducive to the progress of subsequent technique, ensures the quality of production.
Heat-treatment furnace in step 4 includes more boiler tubes 1 being connected in heating device 2, and boiler tube 1 is held on heating
In the arc groove of refractory brick top surface in device 2, the heating tube 2.1 being arranged in the heating device 2 is located at the top of boiler tube 1;
Intermediate gas tank 4 is connected with ammonia destruction furnace, and intermediate gas tank 4 is connected with every boiler tube 1 respectively by more branch pipes;Thus will
The nitrogen and hydrogen generated in ammonia destruction furnace imports in boiler tube 1, and nitrogen is inert gas, serves as protective gas, hydrogen is in stove
The open end of pipe 1 and extraneous oxygen combustion, to stop that oxygen carries out in such as boiler tube 1, therefore ensure that the stainless steel in boiler tube 1
Silk will not be in contact during brightness heat treatment with oxygen, ensure that treatment effect and the participation of no oxygen also subtracts significantly
The generation for having lacked impurity avoids the generation of deposit on 1 inner wall of boiler tube;
Further, anti-deposit coating is coated on the inner wall of the boiler tube 1, to ensure to be that convenient deposit generates,
It will not be adhered with the inner wall of boiler tube 1, easy cleaning is safeguarded;
Further, external screw thread is provided on the outer wall of the open end of boiler tube 1, the inner wall of resistance to mill tube is provided with internal thread,
Resistance to mill tube is spun on by inside spin on the external screw thread of boiler tube 1, and the center of resistance to mill tube is provided with the perforation by stainless steel wire, should
Resistance to mill tube is made of wear-resistant material, passes through resistance to mill tube so that by 1 both ends of boiler tube stainless steel wire can smooth centering, avoid
Its friction caused by inclination with boiler tube inner wall;
Further, the boiler tube 1 is inserted in solution heat treatment slot 3, after heating device 2 is heated, by solid
Coolant liquid in molten heat treatment groove 3 carries out solution annealing processing(A kind of water-cooling pattern i.e. in step 5), further help in and carry
The treatment effect of high stainless steel wire;
In addition:It should be noted that above-mentioned specific implementation mode is only a prioritization scheme of this patent, the skill of this field
Any change or improvement that art personnel are done according to above-mentioned design, within the protection domain of this patent..