阅读说明：本技术 一种离心浇注方法 (A kind of casting method for centrifugal ) 是由 张新宇 高海 程鹏 毛凯田 展益彬 李慧 于 2019-09-06 设计创作，主要内容包括：本发明公开了一种离心浇注方法。该方法包括出钢、吊运和浇注过程,离心浇注采用柱塞包和浇注小车进行,浇注包括：1)包嘴伸入管模；2)柱塞包放在中间包上,压实耐火密封垫密封；3)惰性气体由惰性气体出口Ⅰ进入中间包；4)打开柱塞包的柱塞,实现离心浇注。钢水吊运在保护渣或惰性气体的保护下进行。钢水出钢采用遍布惰性气体出口Ⅱ的出钢小车,在出钢小车后部安装有煤气管和氧气管；出钢过程包括以下步骤：1)惰性气体由惰性气体出口Ⅱ排出,包围柱塞包,隔绝空气；2)关闭氧气管和煤气管；3)出钢。钢水出钢、吊运、浇注全部过程中,采用隔绝空气措施,杜绝钢水氧化,保证了钢水成分和铸钢管内在质量。(The invention discloses a kind of casting method for centrifugal.This method includes tapping, handling and casting process, and centrifugal casting is carried out using plunger packet and casting trolley, casting include: 1) packet mouth protrude into pipe die；2) plunger packet is placed on tundish, compacting fire-resistant seal sealing；3) inert gas enters tundish by inert gas outlet I；4) plunger for opening plunger packet, realizes centrifugal casting.Molten steel handling carries out under the protection of covering slag or inert gas.Molten steel tapping is equipped with gas pipe and oxygen hose using the tapping trolley throughout inert gas outlet II, at tapping trolley rear portion；For tapping process the following steps are included: 1) inert gas is discharged by inert gas outlet II, encirclement plunger packet completely cuts off air；2) oxygen hose and gas pipe are closed；3) it taps.Molten steel tapping, is poured in all processes handling, using isolation air measure, is prevented molten steel oxidation, be ensure that molten steel composition and cast-steel pipe inherent quality.)

1. a kind of casting method for centrifugal, including tapping, handling and casting, it is characterised in that: the casting using plunger packet (1) and Casting trolley (3), the casting trolley (3) include tundish (2), bracket (8) and travelling bogie, and the tundish (2) is by propping up Frame (8) welding is supported and fixed on the platform of travelling bogie；The tundish (2) includes packet mouth (5), fire-resistant seal (6), lazy Property gas vent I (7), inert gas tube I (9) and packet mouth (11)；It is described casting the following steps are included:

1) packet mouth (11) is made to protrude into pipe die casting end from the non-casting end of pipe die to inert gas, mobile casting trolley (3) are passed through；

2) plunger packet (1) is placed on packet mouth (5), and the top surface of plunger packet (1) bottom surface and Bao Kou (5) is compacted fire-resistant seal (6) Sealing；

3) valve of inert gas tube I (9) is opened, inert gas is by uniformly distributed inert gas outlet I (7) entrance of packet mouth (5) Between wrap (2)；

4) plunger of plunger packet (1) is opened, molten steel flows into pipe die by tundish (2).

2. a kind of casting method for centrifugal according to claim 1, it is characterised in that: the handling is in covering slag or indifferent gas It is carried out under the protection of body.

3. a kind of casting method for centrifugal according to claim 1, it is characterised in that: the tapping is using tapping trolley (12), tapping trolley (12) top is the sandwich of inert gas cavity (15), in interlayer upper surface cover board, throughout lazy Property gas vent II (14)；The inert gas tube II (16) for being connected to inert gas cavity (15) passes through valve and inert gas duct Connection；In a kind of casting method for centrifugal according to claim 1 of tapping, it is characterised in that: trolley (12) rear portion is equipped with Gas pipe (17) and oxygen hose (18)；It is described tapping the following steps are included:

1) inert gas duct valve is opened, inert gas enters inert gas cavity (15) by inert gas tube II (16), It is discharged by inert gas outlet II (14)；

2) oxygen hose (18) are closed, when the packet mouth of plunger packet (1) does not have flare, closed gas pipe (17)；

3) it taps.

4. a kind of casting method for centrifugal according to claim 1 or 3, it is characterised in that: the plunger packet (1) can use sliding Mouth of a river packet substitution.

Technical field

The present invention is applied to centrifugal casting field, and in particular to a kind of casting method for centrifugal, this method can be effectively prevented Molten steel oxidation.

Background technique

Centrifugal casting steel pipe mostly uses intermediate frequency furnace as smelting equipment due to centrifuge production efficiency problem.For certain spies For steel centrifugal casting steel pipe, no matter from performance or from ingredient, it is desirable that the whole process such as entire melting, casting must not Oxidation.Such as strict control is needed during intermediate frequency furnace melting and centrifugal casting containing the oxidizable activity element of Al, Ti Prevent air oxidation.Once molten steel aoxidizes, one increases the oxide inclusion in molten steel, reduces special steel casting mechanics Performance；Two can not accurately control constituent content, and waste product is caused when serious.

In response to the above problems, the melting of vacuum intermediate-frequency furnace is generally used, the melting and casting of alloy are completed in a vacuum.But If also including vacuumizing that over-burden into vacuum chamber for centrifuge, energy consumption is very big, and cost is very high, can be described as at present Point is unrealistic.

Centrifugal casting is common process using inert gas shielding, can complete special steel molten steel and prevent to aoxidize in pipe die, But in the entire flow process of molten steel from pouring ladle to pipe die, it is also desirable to take anti-oxidation measure.

Summary of the invention

Technical problem solved by the present invention is providing a kind of casting method for centrifugal, waited in molten steel tapping, handling, casting Cheng Zhong can effectively prevent molten steel oxidation.

The technical scheme adopted by the invention is that: casting method for centrifugal includes tapping, handling and casting process.Molten steel centrifugation Casting process is carried out using plunger packet and casting trolley, and the casting trolley includes tundish, bracket and travelling bogie, tundish It is supported and fixed on the platform of travelling bogie by bracket welding；The tundish includes that packet mouth, fire-resistant seal, inert gas go out Mouth I, inert gas tube I and packet mouth；The casting process is the following steps are included: 1) from the non-casting end of pipe die to being passed through indifferent gas Body, mobile casting trolley make packet mouth protrude into pipe die casting end；2) plunger packet is placed on tundish, plunger packet bottom surface and centre The upper surface compacting fire-resistant seal sealing of packet；3) valve of inert gas tube I is opened, inert gas is evenly distributed with by tundish packet mouth Inert gas outlet I enter tundish；4) plunger of plunger packet is opened, molten steel flows into pipe die by tundish, realizes centrifugation Casting.

Further, the handling carries out under the protection of covering slag or inert gas.

Further, molten steel tapping process is carried out using tapping trolley, and the top of the tapping trolley is inert gas cavity Sandwich, in interlayer upper surface cover board, throughout inert gas outlet II；It is connected to the inert gas tube II of inert gas cavity It is connect by valve with inert gas duct；Gas pipe and oxygen hose are installed at tapping trolley rear portion；Tapping process include with Lower step: 1) inert gas duct valve is opened, inert gas enters inert gas cavity by inert gas tube II, by inertia Gas vent II is discharged；Inert gas surrounds plunger packet, completely cuts off air；2) oxygen hose is closed, when the packet mouth of plunger packet does not have When flare, gas pipe is closed；3) intermediate frequency furnace is tumbled tapping.

Above-mentioned plunger packet can be replaced with slide gate nozzle packet.

The beneficial effects of the present invention are: molten steel from tapping, handling, be poured all processes in, using covering slag or indifferent gas Body completely cuts off air, and whole process protection prevents molten steel oxidation, ensure that molten steel composition and cast-steel pipe inherent quality.

Detailed description of the invention

Fig. 1 is present invention casting schematic diagram；

Fig. 2 is casting trolley structural schematic diagram；

Fig. 3 is tapping schematic diagram；

Fig. 4 is tapping vehicle structure schematic diagram；

Wherein: 1- plunger packet, 2- tundish, 3- casting trolley, 4- pipe die, 5- packet mouth, 6- fire-resistant seal, 7- inert gas go out Mouth I, 8- bracket, 9- inert gas tube I, 10- ring pipe, 11- packet mouth, 12- tapping trolley, 13- intermediate frequency furnace, 14- inert gas Export II, 15- inert gas cavity, 16- inert gas tube II, 17- gas pipe, 18- oxygen hose, 19- back stall.

Specific embodiment