CN202667247U

CN202667247U - Bead welding roll replacing grain roll

Info

Publication number: CN202667247U
Application number: CN 201220049662
Authority: CN
Inventors: 李伟峰
Original assignee: BEIJING CAMET METALLURGICAL TECHNOLOGIES CO LTD
Current assignee: BEIJING CAMET METALLURGICAL TECHNOLOGIES CO LTD
Priority date: 2012-02-16
Filing date: 2012-02-16
Publication date: 2013-01-16
Anticipated expiration: 2022-02-16

Abstract

The utility model provides a bead welding roll replacing a grain roll. The bead welding roll is characterized in that a bead welding layer 2 is formed on the surface of a steel inner core 1 through bead welding processing by utilizing a roll surface bead welding technology, and the bead welding layer serves as a roll working layer to replace the grain roll on a hot continuous rolling production line.

Description

A kind of novel surfacing roll of alternative grain roll

Technical field

The utility model relates to the part on a kind of milling train, adopts the surface overlaying technology to carry out built-up welding in the steel core surface and processes, and substitutes the novel surfacing roll of traditional grain roll as the roll working lining with overlay cladding, belongs to technical field of metallurgical equipment.

Background technology

Roll is that the pressure that produces when utilizing it to roll rolls the instrument that the stone roller steel make stocking generation plastic deformation, is the strength member on steel rolling mill's rolling mill.The roll that uses on the hot continuous rolling production line in the process for producing steel and iron at present is grain roll substantially, and there are the following problems in the production of reality and use procedure for grain roll:

1. the instructions for use of hot continuous rolling production line breaker roll is that inner core intensity is high and hardness of roll body is high, and the roller core intensity of grain roll is difficult to reach requirement;

2. need to add the metals such as chromium nickel in the casting process, cause casting technique control difficulty to become large, the machined difficulty;

3. grain roll very difficultly can carry out the surface overlaying reparation because carbon equivalent is too high, can not reuse.

Summary of the invention

The utility model proposes a kind of novel surfacing roll of alternative grain roll, it is characterized in that using the roller surface technique for overlaying and carry out the built-up welding processing on the mother metal surface of cast steel or forged steel, with the working lining of overlay cladding as roll, mainly be applied to the roller surface technique for overlaying.According to the difference that the different frame breaker roll of hot rolling line case hardness requires, can select different welding wire breaker roll surfaces to carry out built-up welding.The built-up welding number of plies of for the first time built-up welding is layer 2-4, carries out again built-up welding when using roller surface and defective occurring.Later each built-up welding number of plies is the 1-2 layer for the second time.

This kind technique has well solved the problem of grain roll mentioned above in producing and using:

1. the intensity of steel inner core is much better than cast iron, and hardfacing weld deposit hardness is good;

2. the steel inner core is selected ordinary carbon steel, need not to add alloy, and production and processing is easy;

3. repeatedly built-up welding of roll is reused.

Description of drawings

Fig. 1 is the schematic diagram of plain cast iron roll;

Fig. 2 is the schematic diagram of novel surfacing roll, and 1 is the steel inner core, and 2 is overlay cladding;

The specific embodiment

1. produce steel roll according to the specification of the required grain roll of hot-rolling mill, but barrel diameter is more smaller than original grain roll, guarantees the size after the built-up welding, carry out machined and remove blemish, carry out preheating after the flaw detection, programming rate is not declared too fast.

2. form overlay cladding 2 in the 1 enterprising windrow weldering of steel inner core after preheating is finished, built-up welding is carried out machined to the body of roll after finishing, and carries out at last annealing in process.

3. after roll uses a period of time, carry out built-up welding with above-mentioned step again and process, reuse.

Claims

1. the novel surfacing roll of an alternative grain roll is characterized in that using the roller surface technique for overlaying and carries out the built-up welding processing on the mother metal surface of cast steel or forged steel.

2. the novel surfacing roll of a kind of alternative grain roll according to claim 1 is characterized in that processing in the enterprising windrow weldering of steel inner core, with the working lining of overlay cladding as roll.

3. the novel surfacing roll of a kind of alternative grain roll according to claim 1 is characterized in that the number of plies of for the first time built-up welding is layer 2-4, and later on each built-up welding number of plies is the 1-2 layer.

4. the novel surfacing roll of a kind of alternative grain roll according to claim 1 is characterized in that and can select corresponding welding wire kind to carry out built-up welding according to the difference that the different frame breaker roll of hot continuous rolling production line case hardness requires.

5. the novel surfacing roll of a kind of alternative grain roll according to claim 1 is characterized in that the novel surfacing roll of steel inner core can carry out repeatedly built-up welding, Reusability.