CN106734951A - A kind of high manganese steel frog plane vertical pouring production method for being precisely controlled cast parameter - Google Patents

Abstract

The invention provides a high-manganese steel frog flat-casting production method that can accurately control pouring parameters. The corresponding sand box is made according to the product drawing, and the frog cavity, inner runner and vertical pouring are made in the sand box. The frog cavity and the vertical runner are arranged in parallel, and the inner runner is located between the frog cavity and the vertical runner, and a plurality of them are arranged from bottom to top. The pouring process adopts sand box vertical pouring, and the number of slag inclusions and pores in the high manganese steel frog products produced by this production method is obviously reduced, which effectively improves the product quality.

Description

A production method of high manganese steel frog horizontal casting and vertical casting that can accurately control pouring parameters

technical field

The invention relates to a high manganese steel frog, in particular to a production method for horizontal and vertical casting of a high manganese steel frog which can accurately control pouring parameters.

Background technique

Frogs are key components of railway turnout systems, and high manganese steel frogs are widely used around the world due to their unique characteristics. With the continuous increase in the operating mileage, carrying weight and speed of my country's railways, the specifications and varieties of high manganese steel frogs are constantly changing, and the quality requirements for high manganese steel frogs are rapidly increasing. At present, the production of high manganese steel frogs generally adopts the method of hanging ladle + flat tilting pouring, as shown in Figure 1, the hanging ladle pouring makes the ladle out of the heating condition, and the molten steel is exposed to the atmosphere, resulting in pouring parameters in the production process ( Pouring temperature, flow rate and pressure) are uncontrollable; in the flat pouring method, the riser is located on one side of the frog, and the feeding conditions are not good, resulting in casting defects (including back shrinkage porosity, shrinkage cavities, pores, slag inclusions and grains) Coarse, etc.) are enriched inside and on the surface of the product, which seriously affects the performance, quality and life of the product, and brings hidden dangers to the safe and reliable operation of railway trains. This is the deficiency of the existing technology.

Contents of the invention

The technical problem to be solved by the present invention is to provide a production method of high manganese steel frogs that can precisely control pouring parameters in order to solve the deficiencies in the prior art. The high manganese steel frogs produced by this production method The number of slag inclusions and pores inside the fork product is significantly reduced, which effectively improves the product quality.

This scheme is realized through the following technical measures: the production method of the high manganese steel frog that can accurately control the pouring parameters is as follows: make the corresponding sand box according to the product drawing, and make the frog cavity in the sand box , an inrunner and a vertical runner, the frog cavity and the vertical runner are arranged in parallel, and the inner runner is located between the frog cavity and the vertical runner, and a plurality of them are arranged from bottom to top.

The above-mentioned ingates are inclined from bottom to top from the vertical sprue to the frog cavity, and the centerline of each ingate and the centerline of the vertical runner have an equal angle α, and the value range of the angle α is 70° ≤α≤80°.

The value of the above-mentioned included angle α is α=75°.

Specifically, the high-manganese steel frog flat-casting production method that can precisely control pouring parameters includes the following steps in sequence:

(1) Making wooden molds;

(2) Making sand molds;

(3) Brush the paint and clean the sand box;

(4) After closing the box, place the sand box vertically;

(5) Smelting molten steel and adjusting the composition of molten steel;

(6) The molten steel is injected into the closed casting ladle through the tundish, and the pouring ladle is pumped;

(7) Carry out secondary heating to the molten steel;

(8) Blow argon into the closed pouring ladle;

(9) Pouring;

(10) After the pouring is completed, open the box, cut the vertical sprue and heating riser, and enter the water toughening treatment stage.

Preferably, the production method of high manganese steel frog horizontal casting and vertical casting that can accurately control pouring parameters includes the following steps in sequence:

(1) Make the corresponding sand box according to the product drawing, and make frog cavity, ingate and vertical runner in the sand box. The frog cavity and vertical runner are set in parallel, and the ingate is located in the frog cavity Between the sprue and the vertical sprue, there are several sets from the bottom to the top. The ingate is inclined from the vertical sprue to the frog cavity from the bottom to the top. acute angle α;

(2) Use chrome ore as the surface sand and water glass as the binder to cover the mixed chrome ore on the surface of the wooden mold. The back sand is compacted with ordinary quartz sand, and carbon dioxide is inserted into the hole to harden the sand mold. ;

(3) The surface of the high manganese steel frog cavity is evenly painted with paint, and after the paint is dried, the surface of the high manganese steel frog cavity is cleaned with a brush;

(4) After closing the box, use sand box clamps on the outside to fix the joint, stand up the closed sand box vertically, stabilize the sand box, put the heating riser and sprue cup, and add heating covering agent to the heating riser ;

(5) Put the raw material into the smelting furnace to melt;

(6) The molten steel smelted in the smelting furnace is injected into the closed casting ladle through the tundish, the lid is preheated in advance, and the exhaust fan is turned on after the lid is closed to discharge the dust and gas in the ladle;

(7) Turn on the power supply of the closed casting ladle to heat the molten steel twice;

(8) Reduce the power supply of the closed pouring ladle, and at the same time blow argon into the closed pouring ladle through the argon blowing port;

(9) Move the sand box to the bottom of the closed casting ladle with a flatbed truck, align the pouring port with the sprue cup, input the set pouring parameters into the terminal computer system, and lift the stopper to start pouring;

(10) The terminal computer system controls the pouring flow rate, constant temperature and constant pressure of molten steel in the whole pouring process;

(11) After the pouring is completed, open the box, cut the vertical sprue and the heating riser, bury it in the sand pit, take it out after a period of heat preservation, and enter the water toughening treatment stage.

Preferably, the production method of high manganese steel frog horizontal casting and vertical casting that can accurately control pouring parameters includes the following steps in sequence:

(1) Make the corresponding sand box according to the product drawing, and make frog cavity, ingate and vertical runner in the sand box. The frog cavity and vertical runner are set in parallel, and the ingate is located in the frog cavity Between the sprue and the vertical sprue, there are several sets from the bottom to the top. The ingate is inclined from the vertical sprue to the frog cavity from the bottom to the top. Acute angle α, the value range of acute angle α is 70°≤α≤80°;

(2) Use chrome ore as the surface sand and water glass as the binder to cover the mixed chrome ore on the surface of the wooden mold. The thickness of the chrome ore is 10-40mm. And inject carbon dioxide to harden the sand mold;

(3) The surface of the high manganese steel frog cavity is evenly coated with alkaline alcohol-based magnesium powder paint, and after the paint is dried, the surface of the high manganese steel frog cavity is cleaned with a brush;

(4) After closing the box, use sand box clamps on the outside to fix the joint, stand up the closed sand box vertically, stabilize the sand box, put the heating riser and sprue cup, and add heating covering agent to the heating riser ;

(5) Put the raw material into the melting furnace to melt, the melting temperature is 1600°C±20°C, add the alloy to adjust the chemical composition to the required range;

(6) The molten steel smelted in the smelting furnace is poured into the closed casting ladle through the tundish, the lid of the ladle is preheated in advance, and the exhaust fan is turned on after the lid of the ladle is closed to discharge the dust and gas in the ladle;

(7) Turn on the power supply of the closed casting ladle, heat the molten steel for a second time, raise the temperature to 1550°C±10°C, and keep it at a constant temperature;

(8) Reduce the power supply of the closed casting ladle, and at the same time blow argon into the closed casting ladle through the argon blowing port set at the bottom of the ladle, so that the temperature of the molten steel drops to 1410°C ± 10°C;

(9) Use a flatbed truck to move the sand box to the bottom of the closed pouring ladle, align the pouring port with the sprue cup, input the set pouring parameters to the terminal computer, and lift the stopper to start pouring;

(10) The terminal computer system realizes continuous heat supply by controlling the power supply current to ensure constant temperature of the molten steel throughout the pouring process; the terminal computer system ensures that the pouring speed is 25-35kg/s by adjusting the opening and closing distance between the stopper rod and the pouring gate; As the liquid level of the molten steel decreases, the terminal computer system will control the argon blowing pressure to gradually increase to ensure a constant pressure of the molten steel during the pouring process;

(11) Open the box 2.5-3.5 hours after pouring, cut the vertical sprue and heating riser, bury it in the sand pit, take it out after 20-30 hours of heat preservation, and enter the water toughening treatment stage.

Preferably, the production method of high manganese steel frog horizontal casting and vertical casting that can accurately control pouring parameters includes the following steps in sequence:

(1) Make the corresponding sand box according to the product drawing, and make frog cavity, ingate and vertical runner in the sand box. The frog cavity and vertical runner are set in parallel, and the ingate is located in the frog cavity Between the sprue and the vertical sprue, there are several sets from the bottom to the top. The ingate is inclined from the vertical sprue to the frog cavity from the bottom to the top. Acute angle α, acute angle α=75°;

(2) Use chrome ore as the surface sand and water glass as the binder to cover the mixed chrome ore on the surface of the wooden mold. The thickness of the chrome ore is 25mm. Inject carbon dioxide to harden the sand mold;

(3) The surface of the high manganese steel frog cavity is evenly coated with alkaline alcohol-based magnesium powder paint, and after the paint is dried, the surface of the high manganese steel frog cavity is cleaned with a brush;

(4) After closing the box, use sand box clamps on the outside to fix the joint, stand up the closed sand box vertically, stabilize the sand box, put the heating riser and sprue cup, and add heating covering agent to the heating riser ;

(5) Put the raw materials into the melting furnace to melt, the melting temperature is 1600°C, add the alloy to adjust the chemical composition to the required range;

(6) The molten steel smelted in the smelting furnace is poured into the closed casting ladle through the tundish, the lid of the ladle is preheated in advance, and the exhaust fan is turned on after the lid of the ladle is closed to discharge the dust and gas in the ladle;

(7) Turn on the power supply of the closed casting ladle, heat the molten steel for a second time, raise the temperature to 1550°C, and keep the temperature constant;

(8) Reduce the power supply of the closed pouring ladle, and at the same time blow argon into the closed pouring ladle through the argon blowing port set at the bottom of the ladle, so that the temperature of the molten steel drops to 1410°C;

(9) Use a flatbed truck to move the sand box to the closed pouring ladle, align the pouring port with the sprue cup, input the set pouring parameters to the terminal computer, and lift the stopper to start pouring;

(10) The terminal computer system realizes continuous heat supply by controlling the power supply current to ensure constant temperature of molten steel in the whole pouring process; the terminal computer system ensures the pouring speed is 30kg/s by adjusting the opening and closing distance between the stopper rod and the pouring port; As the liquid level decreases, the terminal computer system will control the argon blowing pressure to gradually increase to ensure the constant pressure of the molten steel during the pouring process;

(11) Open the box within 3 hours of pouring, cut the vertical sprue and heating riser, bury it in the sand pit, take it out after 24 hours of heat preservation, and enter the water toughening treatment stage.

The above-mentioned heating riser includes a straight heating riser positioned at the bottom and a necked heating riser positioned at the top.

The above sand box includes an upper sand box and a lower sand box, and the box dividing surface between the upper sand box and the lower sand box is coplanar with the side center line of the frog cavity.

The beneficial effects of the technical solution of the present invention:

1. Optimize the structure of the sand box: the filling of molten steel is completed sequentially from bottom to top, and the filling effect and feeding effect of key parts of high manganese steel frogs are given priority, so that the crystal grains are refined during the solidification of molten steel, which greatly improves the The quality of high manganese steel frogs;

2. Improve the pouring method: it is beneficial to the slag inclusion in the molten steel to float up and the gas in the cavity to be discharged. After the casting is formed, the top heating riser is directly cut off to ensure the quality of the high manganese steel frog body;

3. Improvement of ladle pouring system: accurate controllable pouring parameters are realized, the grains are refined during the solidification of molten steel, and the possibility of internal shrinkage and shrinkage is almost zero.

To sum up, the high-manganese steel frog products produced by the high-manganese steel frog production method have almost zero internal defects, fine grains, compact structure, and stable improvement in comprehensive mechanical properties.

Description of drawings

Fig. 1 is a schematic diagram of the pouring structure of a high manganese steel frog in the prior art.

Figure 2 is a process flow diagram of a specific embodiment of the present invention.

Figure 3 is a schematic diagram of the pouring process of a high manganese steel frog.

Fig. 4 is a schematic cross-sectional structure schematic diagram of a front view of a sand box in a specific embodiment of the present invention.

Fig. 5 is a side view structural schematic diagram of a sand box in a specific embodiment of the present invention.

In the figure, 1-gate cup, 2-heating covering agent, 3-heating riser, 4-sprue, 5-inner runner, 6-frog cavity, 7-sand box clamp, 8-sand box , 9- sub-box surface, 10-melting furnace, 11-tundish, 12-casting ladle, 13-stopper, 14-casting port, 15-argon blowing port, 16-exhaust fan, 17-flat car.

detailed description

In order to clearly illustrate the technical characteristics of this solution, the following will describe this solution through specific implementation modes and in conjunction with the accompanying drawings.

A production method for high manganese steel frog flat-casting and vertical casting that can accurately control pouring parameters: make a corresponding sand box 8 according to the product drawing, and make a frog cavity 6, an ingate 5 and a vertical casting in the sand box 8 Road 4, the frog cavity 6 and the vertical runner 4 are arranged in parallel, and the inner runner 5 is located between the frog cavity 6 and the vertical runner 4, and a plurality of them are arranged from bottom to top, and the inner runner 5 is self-supporting The channel 4 inclines from the bottom to the frog cavity 6, and the centerline of each ingate 5 and the centerline of the vertical runner 4 have an equal angle α, and the value range of the angle α is 70°≤α ≤80°, the preferred angle α is α=75°.

Specifically, the high-manganese steel frog flat-casting production method that can precisely control pouring parameters includes the following steps in sequence:

(1) Making wooden molds;

(2) Making sand molds;

(3) brush paint, sand cleaning box 8;

(4) Place the sand box 8 vertically after closing the box;

(5) Smelting molten steel and adjusting the composition of molten steel;

(6) The molten steel is injected into the closed casting ladle 12 through the tundish 11, and the pouring ladle 12 is pumped;

(7) Carry out secondary heating to the molten steel;

(8) Blow and fill the closed pouring ladle 12 with argon;

(9) Pouring;

(10) After the pouring is completed, open the box, cut the vertical sprue 4 and the heating riser 3, and enter the water toughening treatment stage.

Preferably, the production method of high manganese steel frog horizontal casting and vertical casting that can accurately control pouring parameters includes the following steps in sequence:

(1) Make the corresponding sand box 8 according to the product drawing, and make the frog cavity 6, the inner runner 5 and the vertical runner 4 in the sand box 8, and the frog cavity 6 and the vertical runner 4 are arranged in parallel, and the inner runner The runner 5 is located between the frog cavity 6 and the vertical runner 4, and multiple runners are arranged from bottom to top. The runner 5 is inclined upward from the runner 4 to the frog cavity 6. There is an equal acute angle α between the centerline and the centerline of the vertical runner 4;

(2) Use chrome ore as the surface sand and water glass as the binder to cover the mixed chrome ore on the surface of the wooden mold. The back sand is compacted with ordinary quartz sand, and carbon dioxide is inserted into the hole to harden the sand mold. ;

(3) The surface of the high manganese steel frog cavity 6 is evenly painted with paint, and after the paint is dried, the surface of the high manganese steel frog cavity 6 is cleaned with a brush;

(4) After the box is closed, the outer side is fixed with the sand box clip 7, and the closed sand box 8 is erected vertically, the sand box 8 is stabilized, the heating riser 3 and the sprue cup 1 are placed, and the heating riser Add heat-generating covering agent 2 into mouth 3;

(5) Put the raw material into the smelting furnace 10 and melt it;

(6) The molten steel smelted in the smelting furnace 10 is poured into the closed casting ladle 12 through the tundish 11, the lid of the ladle is preheated in advance, and the exhaust fan 16 is turned on after the lid is closed to discharge the dust and gas in the ladle 12;

(7) Turn on the power supply of the closed casting ladle 12 to heat the molten steel twice;

(8) Reduce the power supply of the closed pouring ladle 12, and blow argon into the closed pouring ladle 12 through the argon blowing port 15 at the same time;

(9) Use the flatbed truck 17 to move the sand box 8 to the bottom of the closed pouring ladle 12, align the pouring port 14 with the sprue cup 1, input the set pouring parameters into the terminal computer system, and lift the stopper rod 13 to start pouring;

(10) The terminal computer system controls the pouring flow rate, constant temperature and constant pressure of molten steel in the whole pouring process;

(11) After the pouring is completed, open the box, cut the vertical sprue 4 and the heating riser 3, bury it in the sand pit, take it out after a period of heat preservation, and enter the water toughening treatment stage.

Preferably, the production method of high manganese steel frog horizontal casting and vertical casting that can accurately control pouring parameters includes the following steps in sequence:

(1) Make the corresponding sand box 8 according to the product drawing, and make the frog cavity 6, the inner runner 5 and the vertical runner 4 in the sand box 8, and the frog cavity 6 and the vertical runner 4 are arranged in parallel, and the inner runner The runner 5 is located between the frog cavity 6 and the vertical runner 4, and multiple runners are arranged from bottom to top. The runner 5 is inclined upward from the runner 4 to the frog cavity 6. There is an equal acute angle α between the center line and the center line of the vertical runner 4, and the value range of the acute angle α is 70°≤α≤80°;

(2) Use chrome ore as the surface sand and water glass as the binder to cover the mixed chrome ore on the surface of the wooden mold. The thickness of the chrome ore is 10-40mm. And inject carbon dioxide to harden the sand mold;

(3) The surface of high manganese steel frog cavity 6 is evenly coated with alkaline alcohol-based magnesium powder paint, and after the paint is dried, clean the surface of high manganese steel frog cavity 6 with a brush;

(4) After the box is closed, the outer side is fixed with the sand box clip 7, and the closed sand box 8 is erected vertically, the sand box 8 is stabilized, the heating riser 3 and the sprue cup 1 are placed, and the heating riser Add heat-generating covering agent 2 into mouth 3;

(5) Put the raw material into the smelting furnace 10 to melt, the melting temperature is 1600°C±20°C, add the alloy to adjust the chemical composition to the required range;

(6) The molten steel smelted in the smelting furnace 10 is injected into the closed casting ladle 12 through the tundish 11, the lid is preheated in advance, and the exhaust fan 16 is turned on after the lid is closed to discharge the dust and gas in the ladle;

(7) Turn on the power supply of the closed pouring ladle 12, heat the molten steel twice to raise the temperature to 1550°C±10°C, and maintain a constant temperature;

(8) Reduce the power supply of the closed casting ladle 12, and at the same time blow argon gas into the closed casting ladle 12 through the argon blowing port 15 arranged at the bottom of the ladle, so that the temperature of the molten steel drops to 1410°C ± 10°C;

(9) Use the flatbed truck 17 to move the sand box 8 to the bottom of the closed pouring ladle 12, align the pouring port 14 with the sprue cup 1, input the set pouring parameters to the terminal computer, and lift the stopper rod 13 to start pouring;

(10) The terminal computer system realizes continuous heat supply by controlling the power supply current to ensure constant temperature of molten steel throughout the pouring process; the terminal computer system ensures the pouring speed is 25-35kg/s by adjusting the opening and closing distance between the stopper rod 13 and the pouring port 14 ;As the molten steel level decreases, the terminal computer system will control the argon blowing pressure to gradually increase to ensure the constant pressure of the molten steel during the pouring process;

(11) Open the box 2.5-3.5 hours after the pouring is completed, cut the vertical sprue 4 and the heating riser 3, bury them in the sand pit, take them out after 20-30 hours of heat preservation, and enter the water toughening treatment stage.

Take an assembled high manganese steel frog casting of a certain specification as an example, its material is ZGMn13, its chemical composition is: C: 0.90-1.30; Si: 0.30-1.00; Mn: 11.00-14.00; P≤0.070; S≤0.040, weight The weight is 605kg. The high manganese steel frog horizontal and vertical casting production method that can accurately control the pouring parameters includes the following steps in sequence:

(1) Make the corresponding sand box 8 according to the product drawing, and make the frog cavity 6, the inner runner 5 and the vertical runner 4 in the sand box 8, and the frog cavity 6 and the vertical runner 4 are arranged in parallel, and the inner runner The runner 5 is located between the frog cavity 6 and the vertical runner 4, and multiple runners are arranged from bottom to top. The runner 5 is inclined upward from the runner 4 to the frog cavity 6. There is an equal acute angle α between the centerline and the centerline of the vertical runner 4, and the acute angle α=75°;

(2) Use chrome ore as the surface sand and water glass as the binder to cover the mixed chrome ore on the surface of the wooden mold. The thickness of the chrome ore is 25mm. Inject carbon dioxide to harden the sand mold;

(3) The surface of high manganese steel frog cavity 6 is evenly coated with alkaline alcohol-based magnesium powder paint, and the thickness is controlled according to the size and location of the workpiece. After the paint is dried, brush the gravel on the surface of high manganese steel frog cavity 6 and dust cleaning;

(4) After the box is closed, the outer side is fixed with the sand box clip 7, and the closed sand box 8 is erected vertically, the sand box 8 is stabilized, the heating riser 3 and the sprue cup 1 are placed, and the heating riser Add heat-generating covering agent 2 into mouth 3, and complete the preparation work before pouring of sand box 8;

(5) Put the raw material into the smelting furnace 10 to melt, the smelting temperature is 1600°C, add alloys (such as ferrosilicon or ferrochrome) to adjust the chemical composition to the above-mentioned required range;

(6) The molten steel smelted in the smelting furnace 10 is injected into the closed casting ladle 12 through the tundish 11, the lid is preheated in advance, and the exhaust fan 16 is turned on after the lid is closed to discharge the dust and gas in the ladle;

(7) Turn on the power supply of the closed casting ladle 12, heat the molten steel twice to raise the temperature to 1550°C, and keep the constant temperature continuously;

(8) Reduce the power supply of the closed casting ladle 12, and at the same time blow argon gas into the closed casting ladle 12 through the argon blowing port 15 arranged at the bottom of the ladle, so that the temperature of the molten steel drops to 1410°C;

(9) Use the flatbed truck 17 to move the sand box 8 to the closed pouring ladle 12, align the pouring port 14 with the sprue cup 1, input the set pouring parameters (pouring temperature, flow rate and pressure) to the terminal computer, and lift the plug Rod 13 starts pouring;

(10) The terminal computer system realizes continuous heat supply by controlling the power supply current to ensure constant temperature of molten steel in the whole pouring process; the terminal computer system realizes accurate and reliable pouring flow rate in the whole pouring process by adjusting the opening and closing distance between the stopper rod 13 and the pouring port 14 control to ensure that the pouring speed is 30kg/s; as the molten steel level decreases, the terminal computer system will control the argon blowing pressure to gradually increase to ensure a constant pressure of the molten steel during the pouring process;

(11) Open the box within 3 hours of pouring, cut the vertical sprue 4 and heating riser 3, bury them in the sand pit, take them out after 24 hours of heat preservation, and enter the water toughening treatment stage.

Wherein, the heating riser 3 includes a straight heating riser at the bottom and a necking heating riser at the top, and the number of straight heating risers can be increased or decreased according to feeding needs. During production, heating risers 3 of different forms and specifications can be used according to the specification of the pouring product and the need for feeding. Compared with the side multiple heating risers 3 in the prior art, the sand box 8 adopts a single heating riser 3 at the top. The heating riser 3 of this structure is beneficial to the floating of slag inclusions in the molten steel and the slag inclusion in the frog cavity 6. After the casting is formed, the top heating riser 3 is directly cut off, which ensures the quality of the high manganese steel frog body and significantly reduces the number of slag inclusions and pores inside the cast high manganese steel frog product.

The sand box 8 includes an upper sand box and a lower sand box, and the sub-box surface 9 between the upper sand box and the lower sand box is coplanar with the side center line of the frog cavity 6, that is, the sand box 8 is formed from the frog cavity 6. Separate in the middle, so that the making of sand box 8 and the opening of sand box 8. The sand box adopts flat vertical pouring, and the runners are all buried inside the sand box 8. The runner 4 is opened on one side of the high manganese steel frog cavity 6. According to the characteristics of the high manganese steel, a stepped inner runner is used. 5. According to different product specifications, different numbers of ingates 5 are selected. The heating riser 3 is arranged on the top away from the key part of the high manganese steel frog, and the heating covering agent 2 is added inside it. After the box is closed, the outside of the box body 8 is fixed and closed with sand box clips 7. Stand up the closed sand box 8 vertically, stabilize the sand box 8, place the heating riser 3 and the sprue cup 1, and complete the preparatory work before pouring. During pouring, the filling of molten steel is completed sequentially from bottom to top, giving priority to ensuring the filling effect and feeding effect of key parts of high manganese steel frogs, so that the crystal grains are refined during the solidification of molten steel, and the possibility of internal shrinkage and shrinkage is generated It is almost zero, reducing casting defects, greatly improving the quality of high manganese steel frogs, and improving product performance, quality and stability.

The technical features not described in the present invention can be realized by existing technologies, and will not be repeated here. The present invention is not limited to the above-mentioned specific implementation methods, and changes, modifications, additions or substitutions made by those skilled in the art within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims (9)

1. it is a kind of to be precisely controlled the high manganese steel frog plane vertical pouring production method for pouring into a mould parameter, it is characterized in that：According to product figure Paper makes corresponding sandbox, and railway frog die cavity, ingate and upright casting road are made in sandbox, and railway frog die cavity sets parallel with upright casting road Put, ingate is located between railway frog die cavity and upright casting road, and bottom-up setting is multiple.

2. according to claim 1 to be precisely controlled the high manganese steel frog plane vertical pouring production method for pouring into a mould parameter, it is special Levying is：The ingate self-support running channel is inclined from bottom to top to railway frog die cavity, in the center line and upright casting road of each ingate There is equal angle α, the span of angle α is 70 °≤α≤80 ° between heart line.

3. according to claim 2 to be precisely controlled the high manganese steel frog plane vertical pouring production method for pouring into a mould parameter, it is special Levying is：The value of the angle α is α=75 °.

4. the high manganese steel frog plane vertical pouring production method of the be precisely controlled cast parameter according to claim 1,2 or 3, It is characterized in that：It in turn includes the following steps：

（1）Make wooden model；

（2）Make sand mo(u)ld；

（3）Swabbing, sand removal case；

（4）Sandbox is placed vertically after mould assembling；

（5）Melting molten steel, and adjust molten steel component；

（6）Molten steel injects closed pouring ladle by tundish, and pouring ladle is evacuated；

（7）Reheating intensification is carried out to molten steel；

（8）To blowing applying argon gas in closed pouring ladle；

（9）Cast；

（10）Shake out after casting complete, cuts upright casting road and exothermic riser, into the water-tenacity treatment stage.

5. according to claim 4 to be precisely controlled the high manganese steel frog plane vertical pouring production method for pouring into a mould parameter, it is special Levying is：It in turn includes the following steps：

（1）Corresponding sandbox is made according to product drawing, railway frog die cavity, ingate and upright casting road, railway frog type are made in sandbox Chamber is set parallel with upright casting road, and ingate is located between railway frog die cavity and upright casting road, and bottom-up setting is multiple, and ingate is certainly Upright casting road is inclined from bottom to top to railway frog die cavity, is had between the center line and the center line in upright casting road of each ingate equal Sharp angle α；

（2）Using chrome ore as facing sand, using waterglass as binding agent, the chrome ore that will be mixed is covered in wooden model table Face, the common quartz sand of floor sand hits reality, and jack is simultaneously passed through carbon dioxide, hardens sand mo(u)ld；

（3）High manganese steel frog mold cavity surface uniform brushing paint is clear by high manganese steel frog mold cavity surface with hairbrush after coating drying Reason is clean；

（4）After mould assembling, outside flask clamp is fixed closing, and the sandbox after mould assembling is erected vertically, has stablized sandbox, puts hair well Hot riser and sprue cup, add exothermic shield in exothermic riser；

（5）Raw material are put into smelting furnace and are melted；

（6）The molten steel that smelting furnace is refined injects closed pouring ladle by tundish, and clad is preheated in advance, is opened after closing clad Open pumping blower fan, dust and gas in discharge pouring ladle；

（7）The power supply of closed pouring ladle is connected, reheating intensification is carried out to molten steel；

（8）The output power of closed pouring ladle is reduced, while by argon blowing hole to blowing applying argon gas in closed pouring ladle；

（9）Sandbox is moved into closed pouring ladle lower section with flat car, sprue gate sprue cup is directed at, to terminal computer system The cast parameter that system input sets, lifts stopper and starts cast；

（10）Cast flow velocity, molten steel constant temperature and the constant pressure of overall process are poured into a mould in terminal computing system control；

（11）Shake out after casting complete, cuts upright casting road and exothermic riser, is embedded in sand pit, and insulation is taken out after a period of time and gone forward side by side Enter the water-tenacity treatment stage.

6. according to claim 5 to be precisely controlled the high manganese steel frog plane vertical pouring production method for pouring into a mould parameter, it is special Levying is：It in turn includes the following steps：

（1）Corresponding sandbox is made according to product drawing, railway frog die cavity, ingate and upright casting road, railway frog type are made in sandbox Chamber is set parallel with upright casting road, and ingate is located between railway frog die cavity and upright casting road, and bottom-up setting is multiple, and ingate is certainly Upright casting road is inclined from bottom to top to railway frog die cavity, is had between the center line and the center line in upright casting road of each ingate equal Sharp angle α, the span of sharp angle α is 70 °≤α≤80 °；

（2）Using chrome ore as facing sand, using waterglass as binding agent, the chrome ore that will be mixed is covered in wooden model table Face, the thickness of chrome ore is 10-40mm, and the common quartz sand of floor sand hits reality, and jack is simultaneously passed through carbon dioxide, hardens sand mo(u)ld；

（3）High manganese steel frog mold cavity surface uniformly brushes alkaline alcohol radical magnesium powder coating, with hairbrush by potassium steel rut after coating drying The removing surface of forked type chamber is clean；

（4）After mould assembling, outside flask clamp is fixed closing, and the sandbox after mould assembling is erected vertically, has stablized sandbox, puts hair well Hot riser and sprue cup, add exothermic shield in exothermic riser；

（5）Raw material are put into smelting furnace and are melted, smelting temperature is 1600 DEG C ± 20 DEG C, add alloy adjustment chemical composition extremely Required scope；

（6）The molten steel that smelting furnace is refined injects closed pouring ladle by tundish, and clad is preheated in advance, is opened after closing clad Open pumping blower fan, dust and gas in discharge bag；

（7）The power supply of closed pouring ladle is connected, reheating intensification is carried out to molten steel, temperature is increased to 1550 DEG C ± 10 DEG C, and keep continuing constant temperature；

（8）Closed pouring ladle output power is reduced, while by being arranged at the argon blowing hole of cylinder-packing bottom to closed pouring ladle Applying argon gas are inside blown, molten steel temperature is down to 1410 DEG C ± 10 DEG C；

（9）Sandbox is moved into closed pouring ladle lower section with flat car, sprue gate is directed at sprue cup, it is defeated to terminal computer Enter the cast parameter for setting, lift stopper and start cast；

（10）Terminal computing system is realized continuing heat supply by controlling source current size, it is ensured that cast overall process molten steel is permanent Temperature；Terminal computing system is by adjusting the folding distance of stopper and sprue gate, it is ensured that poring rate is 25-35kg/s；With The reduction of molten steel liquid level, terminal computing system will control Argon pressure to gradually rise, it is ensured that perseverance of the molten steel in casting process Constant-pressure；

（11）Shake out after casting complete 2.5-3.5 hours, cuts upright casting road and exothermic riser, is embedded in sand pit, and 20-30 is small for insulation When after take out enter the water-tenacity treatment stage.

7. according to claim 6 to be precisely controlled the high manganese steel frog plane vertical pouring production method for pouring into a mould parameter, it is special Levying is：It in turn includes the following steps：

（1）Corresponding sandbox is made according to product drawing, railway frog die cavity, ingate and upright casting road, railway frog type are made in sandbox Chamber is set parallel with upright casting road, and ingate is located between railway frog die cavity and upright casting road, and bottom-up setting is multiple, and ingate is certainly Upright casting road is inclined from bottom to top to railway frog die cavity, is had between the center line and the center line in upright casting road of each ingate equal Sharp angle α, sharp angle α=75 °；

（2）Using chrome ore as facing sand, using waterglass as binding agent, the chrome ore that will be mixed is covered in wooden model table Face, the thickness of chrome ore is 25mm, and the common quartz sand of floor sand hits reality, and jack is simultaneously passed through carbon dioxide, hardens sand mo(u)ld；

（3）High manganese steel frog mold cavity surface uniformly brushes alkaline alcohol radical magnesium powder coating, with hairbrush by potassium steel rut after coating drying The removing surface of forked type chamber is clean；

（4）After mould assembling, outside flask clamp is fixed closing, and the sandbox after mould assembling is erected vertically, has stablized sandbox, puts hair well Hot riser and sprue cup, add exothermic shield in exothermic riser；

（5）Raw material are put into smelting furnace and are melted, smelting temperature is 1600 DEG C, add alloy to adjust chemical composition to required model Enclose；

（6）The molten steel that smelting furnace is refined injects closed pouring ladle by tundish, and clad is preheated in advance, is opened after closing clad Open pumping blower fan, dust and gas in discharge bag；

（7）The power supply of closed pouring ladle is connected, reheating intensification is carried out to molten steel, temperature is increased to 1550 DEG C, and hold Constant temperature is held in continuation of insurance；

（8）Closed pouring ladle output power is reduced, while by being arranged at the argon blowing hole of cylinder-packing bottom to closed pouring ladle Applying argon gas are inside blown, molten steel temperature is down to 1410 DEG C；

（9）Sandbox is moved under closed pouring ladle with flat car, sprue gate is directed at sprue cup, be input into terminal computer The cast parameter for setting, lifts stopper and starts cast；

（10）Terminal computing system is realized continuing heat supply by controlling source current size, it is ensured that cast overall process molten steel is permanent Temperature；Terminal computing system is by adjusting the folding distance of stopper and sprue gate, it is ensured that poring rate is 30kg/s；With molten steel The reduction of liquid level, terminal computing system will control Argon pressure to gradually rise, it is ensured that constant pressure of the molten steel in casting process Power；

（11）3 hours shake outs of casting complete, cut upright casting road and exothermic riser, be embedded in sand pit, insulation 24 hours after take out into Enter the water-tenacity treatment stage.

8. according to claim 7 to be precisely controlled the high manganese steel frog plane vertical pouring production method for pouring into a mould parameter, it is special Levying is：The exothermic riser includes straight tube exothermic riser and position of the position under in upper necking down exothermic riser.

9. according to claim 8 to be precisely controlled the high manganese steel frog plane vertical pouring production method for pouring into a mould parameter, it is special Levying is：The sandbox includes cope and drag box, in flask joint between cope and drag box and the side of railway frog die cavity Heart line is coplanar.