阅读说明：本技术 一种低尘多用途高锰钢药芯焊丝及其制备工艺 (Low-dust multipurpose high-manganese steel flux-cored wire and preparation process thereof ) 是由 吴郁均 于 2021-06-09 设计创作，主要内容包括：本发明公开了一种低尘多用途高锰钢药芯焊丝及其制备工艺,该药芯焊丝包括以下组分及含量：钛白粉17-22％、钒铁粉1－3％、金属铬粉3-5％、金属锰粉60-70％、萤石粉5-8％和钼铁2-4％,并将上述原料通过各组分的粉料分别过筛、将过筛后的粉料根据不同特性分高低温进行分开烘焙、将烘干后的各组分按照相应质量百分比配料混合和U型钢带由成型机轧制成型得到成品高锰钢药芯焊丝,该低尘多用途高锰钢药芯焊丝及其制备工艺,不仅能焊补铁道道岔还可用于多种高强钢的对接,且大大地降低了焊接烟尘、焊缝金属强度高、焊缝金属韧性好和高锰钢材料所具备的变形后硬化耐磨性能没变等特点,增加了整体的强度、成型效果和实用性。(The invention discloses a low-dust multipurpose high manganese steel flux-cored wire and a preparation process thereof, wherein the flux-cored wire comprises the following components in percentage by weight: titanium dioxide of 17-22 percent, ferrovanadium powder of 1-3 percent, chromium powder of 3-5 percent, manganese powder of 60-70 percent, fluorite powder of 5-8 percent and ferromolybdenum of 2-4 percent, respectively sieving the raw materials by powder of each component, separately baking the sieved powder at high and low temperatures according to different characteristics, mixing the dried components according to corresponding mass percent, and rolling and molding the U-shaped steel belt by a molding machine to obtain the finished product of the high manganese steel flux-cored wire, the low-dust multipurpose high-manganese steel flux-cored wire and the preparation process thereof can not only weld and repair railway turnouts, but also be used for butt joint of various high-strength steels, the method has the advantages of greatly reducing welding smoke dust, along with high weld metal strength, good weld metal toughness, unchanged hardening and wear resistance after deformation and the like of the high manganese steel material, and increasing the overall strength, forming effect and practicability.)

1. A low-dust multipurpose high manganese steel flux-cored wire and a preparation process thereof are characterized in that: the flux-cored wire comprises the following components in percentage by weight: 17-22% of titanium dioxide, 1-3% of ferrovanadium powder, 3-5% of metal chromium powder, 60-70% of metal manganese powder, 5-8% of fluorite powder and 2-4% of ferromolybdenum.

2. The low-dust multipurpose high-manganese steel flux-cored wire and the preparation process thereof as claimed in claim 1, wherein: the total of the components of the titanium dioxide, the ferrovanadium powder, the metal chromium powder, the metal manganese powder, the fluorite powder and the ferromolybdenum is 100 percent.

3. The low-dust multipurpose high-manganese steel flux-cored wire and the preparation process thereof as claimed in claim 1, wherein: the titanium dioxide comprises the chemical components with the mass percentage of TiO2 being more than or equal to 98 percent, S being less than or equal to 0.05 percent and P being less than or equal to 0.05 percent.

4. The low-dust multipurpose high-manganese steel flux-cored wire and the preparation process thereof as claimed in claim 1, wherein: the chemical components and mass percentage of the metal manganese powder are that Mn is more than or equal to 97.0 percent, S is less than or equal to 0.04 percent, P is less than or equal to 0.04 percent, and C is less than or equal to 0.08 percent.

5. The low-dust multipurpose high-manganese steel flux-cored wire of claims 1-4, wherein: the preparation process of the high-manganese flux-cored wire comprises the following steps:

the method comprises the following steps: powder materials of all components are respectively sieved, and titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum are placed in a vibrating screen for sieving, so that the sieved raw material components are 17-22% of titanium dioxide, 1-3% of ferrovanadium powder, 3-5% of metal chromium powder, 60-70% of metal manganese powder, 5-8% of fluorite powder and 2-4% of ferromolybdenum;

step two: separately baking the sieved powder according to different characteristics at high and low temperatures, and drying titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum in a dryer to ensure that the whole interior does not contain water and prevent the whole interior from caking, wherein the total content of the dried titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum is 100%;

step three: mixing the dried components according to corresponding mass percentage, placing 17-22% of titanium dioxide, 1-3% of ferrovanadium powder, 3-5% of metal chromium powder, 60-70% of metal manganese powder, 5-8% of fluorite powder and 2-4% of ferromolybdenum into a stirring tank for stirring and mixing, ensuring the complete mixing of the whole, stirring and stirring for 10-15 minutes at a stirring speed of 100 plus 150rpm until the powder in the whole is completely mixed, performing secondary screening on the mixed powder through a vibrating screen, placing the screened powder into a heat-insulating barrel for heat-insulating storage, and keeping the temperature of 20 ℃ in the heat-insulating barrel for storage;

step four: and putting the mixed materials into a U-shaped steel belt, rolling and molding the U-shaped steel belt by a molding machine, drawing the molded materials, ensuring that the molded materials meet the size requirement, cleaning and drying the materials meeting the size requirement, facilitating the overall subsequent operation, and winding the workpieces meeting the size requirement layer by layer to obtain the molded high manganese steel flux-cored wire.

Technical Field

The invention relates to the technical field of magnesium plates, in particular to a low-dust multipurpose high manganese steel flux-cored wire and a preparation process thereof.

Background

The high manganese steel is also called high manganese austenitic steel, has no magnetism and good toughness, and has excellent wear resistance because the surface of the high manganese steel is rapidly hardened under large impact or extrusion. The working environment of parts made of high manganese steel, such as tracks and gears of a bulldozer, hammers, jaw plates and rollers of a crusher is very severe, the damage amount is very large, the parts are generally repaired by high manganese steel welding rods D256, D276 and D266, when the parts are repaired by the welding rods, cracks are easily generated on a welding layer and a heat affected zone, and the wear resistance degree cannot meet higher requirements.

However, most of high manganese steel flux-cored wires cannot meet the repair welding requirements of railway turnouts, strong yellow smoke is generated during welding, and welding smoke generated by other welding materials is generally white and gray. The main poison in the yellow smoke is manganese, and the operator can be poisoned by the manganese and the particles and steam of the manganese and the compounds thereof which exceed the allowable concentration are absorbed for a long time, so that the wear resistance of the D286 welding rod which is developed later is greatly improved, the welding repair requirement of the railway turnout is met, but the defect of the yellow smoke generated when the D286 welding rod is used for welding still exists because the D286 welding rod is limited by the manufacturing mode of the welding rod, such as the coating performance of the welding rod needs viscosity, elasticity, plasticity, slipperiness and the like, and the binder is inevitably added.

Disclosure of Invention

The invention aims to provide a low-dust multipurpose high manganese steel flux-cored wire and a preparation process thereof, aiming at solving the problems that most high manganese steel flux-cored wires are provided in the background technology, weld metal cannot meet the repair welding requirement of railway turnouts, strong yellow smoke is generated during welding, welding smoke generated by other welding materials is generally white and gray, the main poison in the yellow smoke is manganese, and manganese and the particles and steam of manganese compounds with the allowable concentration are inhaled for a long time, so that an operator can be poisoned by manganese. In order to solve the problems, the wear resistance of the D286 welding rod which is developed later is greatly improved, the repair welding requirement of the railway turnout is met, but the defect of yellow smoke generated when the D286 welding rod is used for welding is still the problem because the D286 welding rod is limited by the manufacturing mode of the welding rod, such as the coating performance of the welding rod needs viscosity, elasticity, plasticity, smoothness and the like, and the binder is inevitably added.

In order to achieve the purpose, the invention provides the following technical scheme: a low-dust multipurpose high manganese steel flux-cored wire and a preparation process thereof are disclosed, wherein the flux-cored wire comprises the following components in percentage by weight: 17-22% of titanium dioxide, 1-3% of ferrovanadium powder, 3-5% of metal chromium powder, 60-70% of metal manganese powder, 5-8% of fluorite powder and 2-4% of ferromolybdenum.

Preferably, the total of the components of the titanium dioxide, the ferrovanadium powder, the metal chromium powder, the metal manganese powder, the fluorite powder and the ferromolybdenum is 100%.

Preferably, the chemical components and mass percentage of the titanium dioxide are that TiO2 is more than or equal to 98 percent, S is less than or equal to 0.05 percent, and P is less than or equal to 0.05 percent.

Preferably, the chemical components and the mass percentage of the metal manganese powder are that Mn is more than or equal to 97.0 percent, S is less than or equal to 0.04 percent, P is less than or equal to 0.04 percent, and C is less than or equal to 0.08 percent.

Preferably, the preparation process of the high-manganese flux-cored wire is as follows:

the method comprises the following steps: powder materials of all components are respectively sieved, and titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum are placed in a vibrating screen for sieving, so that the sieved raw material components are 17-22% of titanium dioxide, 1-3% of ferrovanadium powder, 3-5% of metal chromium powder, 60-70% of metal manganese powder, 5-8% of fluorite powder and 2-4% of ferromolybdenum;

step two: separately baking the sieved powder according to different characteristics at high and low temperatures, and drying titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum in a dryer to ensure that the whole interior does not contain water and prevent the whole interior from caking, wherein the total content of the dried titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum is 100%;

step three: mixing the dried components according to corresponding mass percentage, placing 17-22% of titanium dioxide, 1-3% of ferrovanadium powder, 3-5% of metal chromium powder, 60-70% of metal manganese powder, 5-8% of fluorite powder and 2-4% of ferromolybdenum into a stirring tank for stirring and mixing, ensuring the complete mixing of the whole, stirring and stirring for 10-15 minutes at a stirring speed of 100 plus 150rpm until the powder in the whole is completely mixed, performing secondary screening on the mixed powder through a vibrating screen, placing the screened powder into a heat-insulating barrel for heat-insulating storage, and keeping the temperature of 20 ℃ in the heat-insulating barrel for storage;

step four: and putting the mixed materials into a U-shaped steel belt, rolling and molding the U-shaped steel belt by a molding machine, drawing the molded materials, ensuring that the molded materials meet the size requirement, cleaning and drying the materials meeting the size requirement, facilitating the overall subsequent operation, and winding the workpieces meeting the size requirement layer by layer to obtain the molded high manganese steel flux-cored wire.

The invention has the beneficial effects that: the low-dust multipurpose high manganese steel flux-cored wire and the preparation process thereof have the advantages that the particle size of the titanium dioxide is very small, the average particle size is less than 0.30 mu m, the melting point of the titanium dioxide is 1855 ℃, the boiling point is 2900 ℃, the titanium dioxide plays a role in slag formation originally, but the titanium dioxide plays a more important role in inhibiting smoke dust besides slag formation, during welding, molten drops are generated and transited to a welded piece only in one moment, but a complete process also exists, in the process, because the particle size of the titanium dioxide is much smaller than that of metal manganese powder, the melting point is much higher than that of the titanium dioxide, the boiling point is about 1000 ℃, the titanium dioxide can be covered on the molten metal manganese particles to effectively inhibit the metal manganese particles from generating smoke dust, titanium dioxide is not generally added in high manganese steel powder such as D256, D276 and D266, the addition amount of the titanium dioxide in the D286 welding rod is limited by production conditions, and the multipurpose high manganese dioxide high manganese steel flux-cored wire manufactured by the invention has no effect that the addition amount of the high manganese dioxide in the high manganese steel flux-cored wire with low-dust multipurpose flux-cored wire, in order to enable the flux-cored wire to achieve the effect of low dust, 17-22% of titanium dioxide is added in the formula, so that volatilization and oxidation of metal manganese are effectively inhibited, and generation of yellow smoke is greatly reduced, 1-3% of ferrovanadium and 2-4% of ferromolybdenum are added, so that intermetallic compounds are separated out in the crystallization and cooling processes of a welding seam, the strength of the welding seam metal is improved, meanwhile, smoke generated by the high manganese steel flux-cored wire during welding is almost the same as that of a common flux-cored wire such as ZE711, and forms strong contrast with dense smoke generated by high manganese steel welding rods such as D256, D276 and D266, and is also much less than that generated by the D welding rods, and the high manganese steel flux-cored wire has better physical properties than the D286, can be used for butt joint of various high-strength steel flux-cored wires, and has the advantages of greatly reducing welding smoke 286 and 286, The weld metal has high strength, good toughness and unchanged hardening and wear resistance after deformation, and the like, and increases the overall strength, forming effect and practicability.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention discloses a low-dust multipurpose high manganese steel flux-cored wire and a preparation process thereof, wherein the flux-cored wire comprises the following components in percentage by weight: 17-22% of titanium dioxide, 1-3% of ferrovanadium powder, 3-5% of metal chromium powder, 60-70% of metal manganese powder, 5-8% of fluorite powder and 2-4% of ferromolybdenum.

Furthermore, the total of the components of the titanium dioxide, the ferrovanadium powder, the metal chromium powder, the metal manganese powder, the fluorite powder and the ferromolybdenum is 100%, and the 100% components of the titanium dioxide, the ferrovanadium powder, the metal chromium powder, the metal manganese powder, the fluorite powder and the ferromolybdenum are conveniently and integrally and fully mixed, so that the integral forming effect is improved.

Furthermore, the chemical components and mass percentage of the titanium dioxide are that TiO2 is more than or equal to 98 percent, S is less than or equal to 0.05 percent, P is less than or equal to 0.05 percent, the titanium dioxide has more important function of inhibiting smoke dust besides slagging, and during welding, the generation and transition of molten drops to a welded piece are only instant, but a complete process is also provided, in the process, because the granularity of the titanium dioxide is much smaller than that of the manganese metal powder, the melting point is much higher, and the boiling point is about 1000 ℃, the titanium dioxide can be covered on the molten manganese metal particles, and the smoke dust generation of the manganese metal particles is effectively inhibited.

Furthermore, the chemical components and the mass percentage of the metal manganese powder are that Mn is more than or equal to 97.0 percent, S is less than or equal to 0.04 percent, P is less than or equal to 0.04 percent, and C is less than or equal to 0.08 percent, so that the normal forming of the whole body is ensured, and the practicability of the whole body is improved.

Example one

The method comprises the following steps: powder materials of all components are respectively sieved, and titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum are placed in a vibrating screen for sieving, so that the sieved raw material components are 19% of titanium dioxide, 1.5% of ferrovanadium powder, 3.5% of metal chromium powder, 67% of metal manganese powder, 6% of fluorite powder and 3% of ferromolybdenum;

step two: separately baking the sieved powder according to different characteristics at high and low temperatures, and drying titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum in a dryer to ensure that the whole interior does not contain water and prevent the whole interior from caking, wherein the total content of the dried titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum is 100%;

step three: mixing the dried components according to corresponding mass percentage, placing 19% of titanium dioxide, 1.5% of ferrovanadium powder, 3.5% of metal chromium powder, 67% of metal manganese powder, 6% of fluorite powder and 3% of ferromolybdenum into a stirring tank for stirring and mixing, ensuring the complete mixing of the whole, stirring and stirring for 10-15 minutes at a stirring speed of 100 plus 150rpm until the powder in the whole is completely mixed, performing secondary screening on the mixed powder through a vibrating screen, placing the screened powder into a heat-insulating barrel for heat-insulating storage, and keeping the temperature of 20 ℃ in the heat-insulating barrel for storage;

step four: putting the mixed materials into a U-shaped steel belt, rolling and molding the U-shaped steel belt by a molding machine, drawing the molded materials, ensuring that the molded materials meet the size requirement, cleaning and drying the materials meeting the size requirement, facilitating the overall subsequent operation, and winding the workpieces meeting the size requirement in a layer manner to obtain the molded high manganese steel flux-cored wire;

the low-dust multipurpose high-manganese steel flux-cored wire prepared by the embodiment is adopted for welding, and the physical properties of the weld joint structure are measured and listed in table 1;

example two

The method comprises the following steps: powder materials of all components are respectively sieved, and titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum are placed in a vibrating screen for sieving, so that the sieved raw material components are 20% of titanium dioxide, 2% of ferrovanadium powder, 4% of metal chromium powder, 65% of metal manganese powder, 6% of fluorite powder and 3% of ferromolybdenum;

step two: separately baking the sieved powder according to different characteristics at high and low temperatures, and drying titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum in a dryer to ensure that the whole interior does not contain water and prevent the whole interior from caking, wherein the total content of the dried titanium dioxide, ferrovanadium powder, metal chromium powder, metal manganese powder, fluorite powder and ferromolybdenum is 100%;

step three: mixing the dried components according to corresponding mass percentage, putting 20% of titanium dioxide, 2% of ferrovanadium powder, 4% of metal chromium powder, 65% of metal manganese powder, 6% of fluorite powder and 3% of ferromolybdenum into a stirring tank for stirring and mixing, ensuring the complete mixing of the whole, stirring and stirring for 10-15 minutes at a stirring speed of 100 plus one year of 150rpm until the powder in the whole is completely mixed, carrying out secondary screening on the mixed powder through a vibrating screen, putting the screened powder into a heat-preserving barrel for heat preservation and storage, and keeping the temperature of 20 ℃ in the heat-preserving barrel for storage;

step four: putting the mixed materials into a U-shaped steel belt, rolling and molding the U-shaped steel belt by a molding machine, drawing the molded materials, ensuring that the molded materials meet the size requirement, cleaning and drying the materials meeting the size requirement, facilitating the overall subsequent operation, and winding the workpieces meeting the size requirement in a layer manner to obtain the molded high manganese steel flux-cored wire;

the low-dust multipurpose high-manganese steel flux-cored wire prepared by the embodiment is adopted for welding, and the physical properties of the weld joint structure are measured and listed in table 1;

comparative example 1

The method comprises the following steps: sieving the powder of each component respectively, and putting marble powder, rutile powder, ferrosilicon powder, manganese metal powder and fluorite powder into a vibrating screen for sieving, so as to ensure that the sieved raw material components are 25% of marble powder, 12% of rutile powder, 5% of ferrosilicon powder, 50% of manganese metal powder and 8% of fluorite powder;

step two: separately baking the sieved powder according to different characteristics at high and low temperatures, and drying marble powder, rutile powder, ferrosilicon powder, manganese metal powder and fluorite powder in a dryer to ensure that the whole interior does not contain water and prevent the whole interior from caking, and ensuring that the total content of the dried titanium dioxide, ferrovanadium powder, chromium metal powder, manganese metal powder, fluorite powder and ferromolybdenum is 100%;

step three: mixing the dried components according to corresponding mass percentage, putting 25% of marble powder, 12% of rutile powder, 5% of ferrosilicon powder, 50% of manganese metal powder and 8% of fluorite powder into a stirring tank for stirring and mixing, ensuring the complete mixing, stirring and stirring for 10-15 minutes at a stirring speed of 100 plus 150rpm until the powder in the whole is completely mixed, carrying out secondary screening on the mixed powder through a vibrating screen, putting the screened powder into a heat-preserving barrel for heat preservation and storage, and keeping the temperature of 20 ℃ in the heat-preserving barrel for storage;

step four: putting the mixed materials into a U-shaped steel belt, rolling and molding the U-shaped steel belt by a molding machine, drawing the molded materials, ensuring that the molded materials meet the size requirement, cleaning and drying the materials meeting the size requirement, facilitating the overall subsequent operation, and winding the workpieces meeting the size requirement in a layer manner to obtain the molded high manganese steel flux-cored wire;

the low-dust multipurpose high-manganese steel flux-cored wire prepared by the embodiment is used for welding, and the physical properties of the weld joint structure are measured and listed in table 1.

TABLE 1

	Tensile Strength Rm (MPa)	Elongation A (%)	Welding yellow smoke
				Example one	780	29	Chinese character shao (a Chinese character of 'shao')
Example two	760	28	Chinese character shao (a Chinese character of 'shao')
				Comparative example 1	560	21	Concentration

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.