阅读说明：本技术 一种轧机导辊用高温耐磨合金材料及其制备方法 (High-temperature wear-resistant alloy material for rolling mill guide roller and preparation method thereof ) 是由 杨传坤 于 2020-07-15 设计创作，主要内容包括：本发明公开了一种轧机导辊用高温耐磨合金材料及其制备方法,该材料通过下述重量份的原料制备得到：碳20-25份、铁30-50份、硅5-8份、锰15-20份、镁9-13份、钨8-15份、铬12-17份、钼4-6份、铜7-10份、氮化硼6-8份、刚玉粉3-7份、碳化钛6-9份、镍3-6份；本发明使氮化硼、碳化钛、刚玉粉混入钢液中,提升了制备得到的合金材料的耐高温性能和耐磨性能,同时通过搅拌筒对金属原料混合均匀,方便金属原料在感应电炉中充分混合,省去了直接在感应电炉中搅拌的步骤,提高了工作效率,本发明通过可以自动将感应电炉内的钢液倒入混合筒中,以及将混合筒中的钢液倒出,安全性高。(The invention discloses a high-temperature wear-resistant alloy material for a rolling mill guide roller and a preparation method thereof, wherein the material is prepared from the following raw materials in parts by weight: 20-25 parts of carbon, 30-50 parts of iron, 5-8 parts of silicon, 15-20 parts of manganese, 9-13 parts of magnesium, 8-15 parts of tungsten, 12-17 parts of chromium, 4-6 parts of molybdenum, 7-10 parts of copper, 6-8 parts of boron nitride, 3-7 parts of corundum powder, 6-9 parts of titanium carbide and 3-6 parts of nickel; according to the invention, boron nitride, titanium carbide and corundum powder are mixed into the molten steel, so that the high temperature resistance and wear resistance of the prepared alloy material are improved, meanwhile, the metal raw materials are uniformly mixed through the stirring cylinder, the metal raw materials are conveniently and fully mixed in the induction electric furnace, the step of directly stirring in the induction electric furnace is omitted, and the working efficiency is improved.)

1. The high-temperature wear-resistant alloy material for the guide roller of the rolling mill is characterized by being prepared from the following raw materials in parts by weight: 20-25 parts of carbon, 30-50 parts of iron, 5-8 parts of silicon, 15-20 parts of manganese, 9-13 parts of magnesium, 8-15 parts of tungsten, 12-17 parts of chromium, 4-6 parts of molybdenum, 7-10 parts of copper, 6-8 parts of boron nitride, 3-7 parts of corundum powder, 6-9 parts of titanium carbide and 3-6 parts of nickel;

the material is prepared by the following steps:

step one, adding carbon, iron, chromium and nickel into a mixing drum (16) of an alloy material production device from a feed inlet (26), the fifth motor (22) is started, the fifth motor (22) drives the rope coiling disk (21) to rotate, and pulls the mixing drum (16) to rise to the upper part of one side of the supporting column (15), the fourth motor (18) is started, the fourth motor (18) drives the connecting shaft (17) to rotate, and drives the supporting column (15) to rotate, so that the mixing drum (16) rotates to the upper part of the supporting frame (2), a sixth motor (27) is started, the sixth motor (27) drives a mixing rod (28) to rotate, the stirring blade (29) is driven to rotate, so that carbon, iron, chromium and nickel are uniformly mixed to form a metal mixed material, a valve of the discharge pipe (31) is opened, the metal mixed material passes through the circular through hole (301) and falls into the induction furnace (5), and the metal mixed material is heated and melted in the induction furnace (5);

step two, after molten steel is melted down, when the temperature of the molten steel reaches 1600-;

thirdly, adding boron nitride, titanium carbide and corundum powder preheated at the temperature of 250-270 ℃ for 5-6 hours into a mixing cylinder (9), starting a third motor (12), driving a lead screw (13) to rotate by the third motor (12), driving a moving plate (3) to move, driving an induction furnace (5) to move to one side of the mixing cylinder (9), starting a first motor (6), driving the induction furnace (5) to rotate by the first motor (6), pouring molten steel in the induction furnace (5) into the mixing cylinder (9), covering a sealing cylinder cover (30), starting a second motor (10), driving the mixing cylinder (9) to rotate by the second motor (10), mixing the boron nitride, titanium carbide and corundum powder into the molten steel, opening the sealing cylinder cover (30), driving the mixing cylinder (9) to incline and pour out by the second motor (10) to obtain a liquid high-temperature wear-resistant alloy material, and cooling to obtain the high-temperature wear-resistant alloy material for the rolling mill guide roller.

2. The high-temperature wear-resistant alloy material for the guide roller of the rolling mill as claimed in claim 1, wherein in the first step, the rotation speed of the stirring rod (28) is 600-800 r/min.

3. The high-temperature wear-resistant alloy material for the guide roller of the rolling mill as claimed in claim 1, wherein in the third step, the rotating speed of the mixing cylinder (9) is 350-500 r/min.

4. A preparation method of a high-temperature wear-resistant alloy material for a rolling mill guide roller is characterized by comprising the following specific steps:

step one, adding carbon, iron, chromium and nickel into a mixing drum (16) of an alloy material production device from a feed inlet (26), the fifth motor (22) is started, the fifth motor (22) drives the rope coiling disk (21) to rotate, and pulls the mixing drum (16) to rise to the upper part of one side of the supporting column (15), the fourth motor (18) is started, the fourth motor (18) drives the connecting shaft (17) to rotate, and drives the supporting column (15) to rotate, so that the mixing drum (16) rotates to the upper part of the supporting frame (2), a sixth motor (27) is started, the sixth motor (27) drives a mixing rod (28) to rotate, the stirring blade (29) is driven to rotate, so that carbon, iron, chromium and nickel are uniformly mixed to form a metal mixed material, a valve of the discharge pipe (31) is opened, the metal mixed material passes through the circular through hole (301) and falls into the induction furnace (5), and the metal mixed material is heated and melted in the induction furnace (5);

step two, after molten steel is melted down, when the temperature of the molten steel reaches 1600-;

thirdly, adding boron nitride, titanium carbide and corundum powder preheated at the temperature of 250-270 ℃ for 5-6 hours into a mixing cylinder (9), starting a third motor (12), driving a lead screw (13) to rotate by the third motor (12), driving a moving plate (3) to move, driving an induction furnace (5) to move to one side of the mixing cylinder (9), starting a first motor (6), driving the induction furnace (5) to rotate by the first motor (6), pouring molten steel in the induction furnace (5) into the mixing cylinder (9), covering a sealing cylinder cover (30), starting a second motor (10), driving the mixing cylinder (9) to rotate by the second motor (10), mixing the boron nitride, titanium carbide and corundum powder into the molten steel, opening the sealing cylinder cover (30), driving the mixing cylinder (9) to incline and pour out by the second motor (10) to obtain a liquid high-temperature wear-resistant alloy material, and cooling to obtain the high-temperature wear-resistant alloy material for the rolling mill guide roller.

5. The preparation method of the high-temperature wear-resistant alloy material for the guide roller of the rolling mill according to claim 4, wherein the alloy material production device comprises a supporting bottom plate (1), a supporting frame (2) is fixedly installed on the upper surface of the supporting bottom plate (1) through welding, a moving plate (3) is movably installed on the supporting frame (2) along the horizontal direction, a circular through hole (301) is formed in the middle of the moving plate (3), two connecting side plates (4) are vertically and fixedly installed on the bottom surface of the moving plate (3) through welding, an electric induction furnace (5) is arranged between the two connecting side plates (4), first rotating shafts (7) are fixedly installed on two sides of the electric induction furnace (5), the two first rotating shafts (7) are respectively rotatably connected with the two connecting side plates (4) through bearings, a first motor (6) is fixedly installed on one side of one connecting side plate (4), the output shaft end of the first motor (6) is fixedly connected with one end of one first rotating shaft (7);

the upper surface of the supporting base plate (1) is vertically fixed with two supporting vertical plates (8) through welding, a mixing drum (9) is arranged between the two supporting vertical plates (8), two ends of the mixing drum (9) are respectively fixedly provided with a second rotating shaft (11) through welding, the two second rotating shafts (11) are respectively in rotating connection with the two supporting vertical plates (8) through bearings, one side of one of the supporting vertical plates (8) is fixedly provided with a second motor (10), the output shaft end of the second motor (10) is fixedly connected with one end of one of the second rotating shafts (11), and a sealing drum cover (30) is arranged on the mixing drum (9);

one side of supporting baseplate (1) is provided with unable adjustment base (14), the last surface rotation of unable adjustment base (14) installs support column (15), one side along vertical direction movable mounting of support column (15) has linking arm (25), the one end fixed mounting of linking arm (25) has churn (16).

6. The method for preparing the high-temperature wear-resistant alloy material for the guide roller of the rolling mill according to claim 5, wherein a connecting shaft (17) is fixedly installed at the bottom of the supporting column (15), the connecting shaft (17) penetrates through the upper wall of the fixed base (14) and extends to the inner side of the fixed base (14), the connecting shaft (17) is rotatably connected with the fixed base (14), a second gear (20) is fixedly installed on the connecting shaft (17), a fourth motor (18) is fixedly installed on the inner wall of the lower side of the fixed base (14), a first gear (19) is fixedly installed at an output shaft of the fourth motor (18), and the first gear (19) is meshed with the second gear (20).

7. The method for preparing the high-temperature wear-resistant alloy material for the guide roller of the rolling mill according to claim 5, wherein the support pillar (15) is of a hollow structure, a rope winding disc (21) is rotatably mounted on the inner side of the support pillar (15), a lifting rope (23) is wound on the rope winding disc (21), a fifth motor (22) is fixedly mounted on the outer wall of one side of the support pillar (15), the output shaft end of the fifth motor (22) is fixedly connected with the rope winding disc (21), two support wheels (24) are rotatably mounted on the top of the inner side of the support pillar (15), one end of the lifting rope (23) passes through the two support wheels (24) and extends to the outer side of the support pillar (15), and one end of the lifting rope (23) located on the outer side of the support pillar (15) is fixedly connected with the connecting arm (25);

the vertical slide rail that is fixed with on one side outer wall of support column (15), the one end fixed mounting of linking arm (25) has the slider, linking arm (25) are through slider, slide rail and support column (15) sliding connection.

8. The preparation method of the high-temperature wear-resistant alloy material for the guide roller of the rolling mill according to claim 5, wherein a feeding hole (26) is formed in the top of the stirring cylinder (16), a sixth motor (27) is fixedly installed at the center of the upper surface of the stirring cylinder (16), a stirring rod (28) is installed inside the stirring cylinder (16) in a rotating mode, the top end of the stirring rod (28) is fixedly connected with the output shaft end of the sixth motor (27), stirring blades (29) are fixedly installed on two sides of the stirring rod (28), a discharging pipe (31) is fixedly installed at the bottom of the stirring cylinder (16), and a valve is fixedly installed on the discharging pipe (31).

9. The method for preparing the high-temperature wear-resistant alloy material for the guide roller of the rolling mill according to claim 5, wherein a lead screw (13) is rotatably installed on the upper surface of the supporting frame (2), the bottom of the moving plate (3) is in threaded connection with the lead screw (13), a third motor (12) is fixedly installed on the upper surface of the supporting frame (2), and the output shaft end of the third motor (12) is fixedly connected with one end of the lead screw (13).

10. The method for preparing the high-temperature wear-resistant alloy material for the guide roller of the rolling mill according to claim 5, wherein two sliding rails are fixedly arranged on the upper surface of the supporting frame (2), two sliding blocks are fixedly arranged at two ends of the bottom surface of the moving plate (3), and the moving plate (3) is slidably connected with the supporting frame (2) through the sliding blocks and the sliding rails.

Technical Field

The invention relates to the technical field of metal materials, in particular to a high-temperature wear-resistant alloy material for a rolling mill guide roller and a preparation method thereof.

Background

The guide roller is a part which causes the steel rolling piece to generate plastic deformation in the rolling process of the section steel, mainly bears the dynamic and static load and abrasion in the rolling process, and the guide roller of the rolling mill has short service life, large consumption and frequent replacement because the guide roller works in a high-temperature environment for a long time and bears the impact of shock and hot cooling, and becomes one of the bottlenecks which restrict the production of the steel at present;

patent document (CN106282756B) discloses a high-temperature wear-resistant alloy material for a finishing mill guide roller and a preparation method thereof, the high-temperature resistance and the wear resistance of the finishing mill guide roller are poor, molten steel in an induction electric furnace needs to be stirred manually during the preparation of the alloy material for the finishing mill guide roller, the labor intensity is high, the working efficiency is low, and meanwhile, the molten steel needs to be poured by manpower in the preparation process, and the safety is low.

Disclosure of Invention

The invention aims to provide a high-temperature wear-resistant alloy material for a rolling mill guide roller and a preparation method thereof, wherein the high-temperature wear-resistant alloy material is prepared by adding metal raw materials with low cost, sequentially adding manganese, silicon, magnesium, molybdenum, copper and tungsten into an induction furnace in stages after molten steel is melted down, adding preheated boron nitride, titanium carbide and corundum powder into a mixing cylinder to mix the boron nitride, the titanium carbide and the corundum powder into the molten steel, so that the high-temperature resistance and the wear resistance of the prepared alloy material are improved, and the high-temperature resistance and the wear resistance of the high-temperature wear-resistant alloy material are tested to obtain the high-temperature wear-resistant alloy material with the room-temperature hardness of 64.5-65.3HRC, the hardness of 56.4-57.3HRC at 600 ℃ and the room-temperature impact toughness of 167.9-169.1KJ/mm²The room-temperature tensile strength is 1315-1362MPa, the high-temperature-resistant and wear-resistant alloy material has excellent high-temperature resistance and wear resistance, and the technical problem of poor high-temperature resistance and wear resistance of the existing rolling mill guide roller is solved;

according to the invention, metal raw materials are added into the stirring cylinder from the feeding hole, the rope winding disc is driven to rotate by the fifth motor, the stirring cylinder is pulled to ascend, the support column is driven to rotate by the fourth motor, the stirring cylinder is driven to rotate above the support frame, the stirring blades are driven by the sixth motor to mix the metal raw materials, and all groups of metal raw materials are dropped into the induction electric furnace by opening the valve of the discharge pipe;

according to the invention, the third motor drives the screw rod to rotate and drives the moving plate to move and drives the electric induction furnace to move to one side of the mixing cylinder, the first motor drives the electric induction furnace to rotate, so that molten steel in the electric induction furnace is poured into the mixing cylinder, the second motor drives the mixing cylinder to rotate, the molten steel is mixed, the sealing cylinder cover is opened, and the second motor drives the mixing cylinder to incline to pour out the molten steel.

The purpose of the invention can be realized by the following technical scheme:

the high-temperature wear-resistant alloy material for the guide roller of the rolling mill is prepared from the following raw materials in parts by weight: 20-25 parts of carbon, 30-50 parts of iron, 5-8 parts of silicon, 15-20 parts of manganese, 9-13 parts of magnesium, 8-15 parts of tungsten, 12-17 parts of chromium, 4-6 parts of molybdenum, 7-10 parts of copper, 6-8 parts of boron nitride, 3-7 parts of corundum powder, 6-9 parts of titanium carbide and 3-6 parts of nickel.

A preparation method of a high-temperature wear-resistant alloy material for a rolling mill guide roller comprises the following specific steps:

step one, adding carbon, iron, chromium and nickel into a mixing drum of an alloy material production device from a feed inlet, starting a fifth motor, driving a rope winding disc to rotate by the fifth motor, pulling the mixing drum to rise above one side of a support column, starting a fourth motor, driving a connecting shaft to rotate by the fourth motor, driving the support column to rotate, enabling the mixing drum to rotate above a support frame, starting a sixth motor, driving a mixing rod to rotate by the sixth motor, driving a mixing blade to rotate, enabling the carbon, the iron, the chromium and the nickel to be uniformly mixed to form a metal mixed material, opening a valve of a discharge pipe, enabling the metal mixed material to pass through a circular through hole and fall into an induction furnace, and heating and melting the metal mixed material in the induction furnace;

step two, after molten steel is melted down, when the temperature of the molten steel reaches 1600-1635 ℃, adding manganese and silicon into a stirring cylinder for mixing, adding the mixed manganese and silicon into an induction furnace in the smelting process, preserving heat for 4-7min, then adding magnesium and molybdenum into the stirring cylinder for mixing, adding the mixed magnesium and molybdenum into the induction furnace, preserving heat for 5-8min, then adding copper and tungsten into the stirring cylinder for mixing, adding the mixed copper and tungsten into the induction furnace, removing slag when the temperature of the molten steel reaches 1590-1650 ℃, and stopping electrifying the induction furnace;

and step three, adding boron nitride, titanium carbide and corundum powder preheated at the temperature of 250-270 ℃ for 5-6 hours into a mixing cylinder, starting a third motor, driving a lead screw to rotate by the third motor, driving a moving plate to move, driving an induction furnace to move to one side of the mixing cylinder, starting a first motor, driving the induction furnace to rotate by the first motor, pouring molten steel in the induction furnace into the mixing cylinder, covering a sealing cylinder cover, starting a second motor, driving the mixing cylinder to rotate by the second motor, mixing the boron nitride, the titanium carbide and the corundum powder into the molten steel, opening the sealing cylinder cover, driving the mixing cylinder to incline by the second motor, pouring the molten steel out to obtain a liquid high-temperature wear-resistant alloy material, and cooling to obtain the high-temperature wear-resistant alloy material for the guide roller of the rolling mill.

Further, in the first step, the rotation speed of the stirring rod is 600-.

Further, in the third step, the rotation speed of the mixing cylinder is 350-.

Further, the alloy material production device comprises a supporting bottom plate, a supporting frame is fixedly installed on the upper surface of the supporting bottom plate through welding, a moving plate is movably installed on the supporting frame in the horizontal direction, a circular through hole is formed in the middle of the moving plate, two connecting side plates are vertically and fixedly installed on the bottom surface of the moving plate through welding, an induction furnace is arranged between the two connecting side plates, first rotating shafts are fixedly installed on two sides of the induction furnace, the two first rotating shafts are respectively and rotatably connected with the two connecting side plates through bearings, a first motor is fixedly installed on one side of one of the connecting side plates, and an output shaft end of the first motor is fixedly connected with one end of one of the first rotating shafts;

the upper surface of the supporting bottom plate is vertically fixed with two supporting vertical plates through welding, a mixing drum is arranged between the two supporting vertical plates, two ends of the mixing drum are fixedly provided with second rotating shafts through welding, the two second rotating shafts are respectively and rotatably connected with the two supporting vertical plates through bearings, one side of one of the supporting vertical plates is fixedly provided with a second motor, the output shaft end of the second motor is fixedly connected with one end of one of the second rotating shafts, and a sealing drum cover is arranged on the mixing drum;

one side of supporting baseplate is provided with unable adjustment base, unable adjustment base's last surface rotation installs the support column, one side along vertical direction movable mounting of support column has the linking arm, the one end fixed mounting of linking arm has the churn.

Further, the bottom fixed mounting of support column has the connecting axle, the connecting axle runs through unable adjustment base's upper wall and extends to unable adjustment base's inboard, the connecting axle rotates with unable adjustment base to be connected, fixed mounting has the second gear on the connecting axle, unable adjustment base's downside inner wall fixed mounting has the fourth motor, the output shaft fixed mounting of fourth motor has first gear, first gear meshes with the second gear mutually.

Furthermore, the supporting column is of a hollow structure, a rope winding disc is rotatably mounted on the inner side of the supporting column, a lifting rope is wound on the rope winding disc, a fifth motor is fixedly mounted on the outer wall of one side of the supporting column, the output shaft end of the fifth motor is fixedly connected with the rope winding disc, two supporting wheels are rotatably mounted at the top of the inner side of the supporting column, one end of the lifting rope penetrates through the upper portions of the two supporting wheels and extends to the outer side of the supporting column, and one end, located on the outer side of the supporting column, of the lifting rope is fixedly connected with a connecting arm;

the vertical slide rail that is fixed with on one side outer wall of support column, the one end fixed mounting of linking arm has the slider, the linking arm passes through slider, slide rail and support column sliding connection.

Further, the top of churn is provided with the feed inlet, the upper surface central point of churn puts fixed mounting and has the sixth motor, the puddler is installed in the inside rotation of churn, the top of puddler and the output shaft fixed connection of sixth motor, the equal fixed mounting in both sides of puddler has the stirring leaf, the bottom fixed mounting of churn has the discharging pipe, fixed mounting has the valve on the discharging pipe.

Furthermore, a lead screw is rotatably mounted on the upper surface of the supporting frame, the bottom of the moving plate is in threaded connection with the lead screw, a third motor is fixedly mounted on the upper surface of the supporting frame, and the output shaft end of the third motor is fixedly connected with one end of the lead screw.

Furthermore, two slide rails are fixedly mounted on the upper surface of the supporting frame, two slide blocks are fixedly mounted at two ends of the bottom surface of the moving plate, and the moving plate is connected with the supporting frame in a sliding mode through the slide blocks and the slide rails.

The invention has the beneficial effects that:

according to the invention, the cost of adding metal raw materials is low, after molten steel is molten down, manganese, silicon, magnesium, molybdenum, copper and tungsten are sequentially added into an induction furnace in stages, preheated boron nitride, titanium carbide and corundum powder are added into a mixing barrel, so that the boron nitride, the titanium carbide and the corundum powder are mixed into the molten steel, the high temperature resistance and the wear resistance of the prepared alloy material are improved, the high temperature resistance and the wear resistance of the high temperature wear-resistant alloy material are tested, and the room temperature hardness of the high temperature wear-resistant alloy material is measured to be 64.5-65.3HRC, the room temperature hardness of the high temperature wear-resistant alloy material is measured to be 56.4-57.3HRC, and the room temperature impact toughness is measured to be 167.9-169.1KJ/mm²The room-temperature tensile strength is 1315-1362MPa, and the high-temperature wear-resistant alloy material has excellent high-temperature resistance and wear resistance;

according to the invention, metal raw materials are added into the stirring cylinder from the feeding hole, the rope coiling disc is driven to rotate by the fifth motor, the stirring cylinder is pulled to ascend, the connecting shaft is driven to rotate by the fourth motor, the supporting column is driven to rotate, the stirring cylinder is driven to rotate above the supporting frame, the stirring rod is driven to rotate by the sixth motor, the stirring blades are driven to rotate, the metal raw materials are mixed, and each group of metal raw materials fall into the induction furnace by opening the valve of the discharging pipe;

the third motor drives the lead screw to rotate and drives the moving plate to move and drives the electric induction furnace to move to one side of the mixing cylinder, the first motor drives the electric induction furnace to rotate, molten steel in the electric induction furnace is poured into the mixing cylinder, the second motor drives the mixing cylinder to rotate, the molten steel is mixed, the sealing cylinder cover is opened, and the second motor drives the mixing cylinder to incline to pour out the molten steel.

Drawings

In order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of an alloy material production apparatus according to the present invention;

FIG. 2 is a partial structural plan view of an alloy material production apparatus of the present invention;

FIG. 3 is a sectional front view showing another partial structure of the alloy material production apparatus of the present invention;

FIG. 4 is an assembled side view of the moving plate, the connecting side plate, the induction furnace, and the first motor of the present invention;

FIG. 5 is an assembled side view of the mixing drum, support riser, and second motor of the present invention.

In the figure: 1. a support base plate; 2. a support frame; 3. moving the plate; 301. a circular through hole; 4. connecting the side plates; 5. an induction furnace; 6. a first motor; 7. a first rotating shaft; 8. a support vertical plate; 9. a mixing drum; 10. a second motor; 11. a second rotating shaft; 12. a third motor; 13. a lead screw; 14. a fixed base; 15. a support pillar; 16. a mixing drum; 17. a connecting shaft; 18. a fourth motor; 19. a first gear; 20. a second gear; 21. rope coiling disc; 22. a fifth motor; 23. a lifting rope; 24. a support wheel; 25. a connecting arm; 26. a feed inlet; 27. a sixth motor; 28. a stirring rod; 29. stirring blades; 30. a sealing cylinder cover; 31. and (4) discharging the pipe.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.