CN201429330Y

CN201429330Y - Built-up welding composite furnace roller

Info

Publication number: CN201429330Y
Application number: CN2009203031398U
Authority: CN
Inventors: 杨祥生
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-05-14
Filing date: 2009-05-14
Publication date: 2010-03-24
Anticipated expiration: 2019-05-14

Abstract

The utility model discloses a built-up welding composite furnace roller for transporting steel billets in a heating furnace, which comprises a roller shaft and a roller body, wherein the roller body is fixed on the roller shaft through shaft shoulders arranged on two ends, a breather is arranged on the roller body, and a built-up welding layer is arranged on the roller body. The original single casting body is turned to be a casting, forging and built-up welding composite body. Welding materials and the roller body are secondarily fused and combined during the built-up welding composite process, thereby forming a built-up welding layer with stable material tissue structures and fine crystals, worldwide difficult problems in steel industries comprising roller surface noclulation, stick steel and the like are eliminated in use, and meanwhile, the built-up welding layer can be used for continuous built-up welding after being abraded, and the built-up welding composite furnace roller accords with the economic development requirements, and improves the service span of the furnace roller.

Description

Surfacing compound furnace roller

Technical field

The utility model relates to the roller-way that transports steel billet in a kind of heater for rolling steel in the equipment, particularly heating furnace.

Background technology

At present, in the walking beam furnace at home and abroad, going into stove and coming out of the stove of blank generally all adopts roller-way to take on steel, steel billet is sent in the stove by the dress steel rider road in the stove, by step rate steel billet is delivered to from the charging end stepping in the stove of discharge end on the tapping roller-way, finish the heating process of steel billet simultaneously, then it is sent heating furnace and be rolled by tapping roller-way in the stove.China's roll manufacturing industry has obtained than good result, but has not caught up with the steel and iron industry technological progress fully in the breed structure adjustment through the development of decades, the paces that structure optimization is adjusted, and high-end roll production capacity is obviously not enough.Big shaped steel enterprise such as Baosteel, Anshan iron and steel plant wide plate hoop mill every year all will be from external import roll, and this reflects that the overall manufacture level of China's roll awaits further to improve.Therefore, for being equipped with high performance roll, present-day mill becomes the new problem that China's roll manufacturing industry faces.Under the normal condition, heating furnace work temperature is all more than 950 ℃, and furnace roller is the groundwork body in the heating furnace, particularly guarantees the service behaviour of hearth roll under hot conditions, improves its service life.At present, the product that industry is used is a casting roll, because casting is difficult to avoid producing segregation, it is very common in use to produce dross, crackle, 12 months service life of inlet roller, 10 months service life of homemade roller, and also furnace roller can only melt down casting again after wearing and tearing, increase the production cost of steel mill so greatly, do not met " minimizing, utilize again, recycle, make again " development principle of recycling economy.

The utility model content

The utility model purpose is to provide a kind of surfacing compound furnace roller of new structure, and the single cast body of script is become casting, forging and built-up welding complex.Making the welding material and the body of roll carry out second melting in the built-up welding recombination process combines, form the overlay cladding that materials microstructure is stable, crystal grain is tiny, in use eliminate the global problem of steel industries such as roll surface dross, steel bonding, met the requirement of recycling economy development simultaneously.

The technical scheme that realizes the utility model purpose is:

A kind of surfacing compound furnace roller comprises the roll shaft and the body of roll, and the described body of roll is fixed on the described roll shaft by the shaft shoulder at two ends, and the described body of roll is provided with air-vent, it is characterized in that: an overlay cladding is arranged on the described body of roll.

Between the described roll shaft and the body of roll, be provided with the insulation layer.

The utility model compared with prior art has following advantage:

1. with the original single compound submerged arc overlay welding combination process that changes into of casting, avoid cast article segregation etc. to influence the defective of serviceability, the automatic surfacing technology makes the welding material and the body of roll carry out second melting and combines, form compound working lining--the overlay cladding that materials microstructure is stable, crystal grain is tiny, eliminate the global problem that furnace roller in use is easy to generate steel industries such as steel bonding, dross; Serviceability surpasses casting, forged material product simultaneously, has high strength, high tenacity, high-wearing feature, and furnace roller reaches more than 18 months service life.

2. after overlay cladding wearing and tearing, can continue built-up welding on the body of roll, so the body of roll can obtain recyclingly, meet the requirement of recycling economy development, reduce the production cost of steel mill significantly.

3. between the described roll shaft and the body of roll, be provided with the insulation layer, the simple temperature of roll shaft, the service life of having improved roll shaft.

Description of drawings

Fig. 1 is the structural representation of surfacing compound furnace roller described in the utility model

1. roll shaft 2. bodies of roll 3. shaft shoulders 4. insulation layers 5. air-vent 6. overlay claddings

The specific embodiment

As can be seen from Figure 1, a kind of surfacing compound furnace roller, comprise the roll shaft 1 and the body of roll 2, the described body of roll is fixed on the described roll shaft 1 by the shaft shoulder 3 at two ends, between the described roll shaft 1 and the body of roll 2, be provided with insulation layer 4, the described body of roll 2 is provided with air-vent 5, and an overlay cladding 6 is arranged on the described body of roll 2.

Select welding material according to the instructions for use of furnace roller product in process of production, with welding material according to technological specification built-up welding on the body of roll 2, in weld deposit process with the body of roll 2 second meltings, the overlay cladding 6 that formation is thinner than cast body texture, structure is more closely knit, overlay cladding 6 and the body of roll 2 be combined into the metallurgical binding structure.

Claims

1. surfacing compound furnace roller, comprise the roll shaft (1) and the body of roll (2), the described body of roll is fixed on the described roll shaft (1) by the shaft shoulder (3) at two ends, and the described body of roll (2) is provided with air-vent (5), it is characterized in that: an overlay cladding (6) is arranged on the described body of roll (2).

2. a kind of surfacing compound furnace roller according to claim 1 is characterized in that: be provided with insulation layer (4) between the described roll shaft (1) and the body of roll (2).