A kind of large-thickness slab manufacturing process method

A manufacturing process and large thickness technology, applied in the direction of manufacturing tools, workpiece edge parts, metal processing equipment, etc., can solve the problems of complex operation, high production cost, low production efficiency, etc., to improve production efficiency, improve welding efficiency, high efficiency The effect of production

Inactive Publication Date: 2014-10-22
JIGANG GRP
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The invention overcomes the problems of high production cost, complicated operation and low production efficiency in the welding method of all four side seams of combined continuous casting slabs being welded by full vacuum electron beams, and provides a method for vertical welding of combined continuous casting slabs. Gas shielded welding and submerged arc welding are used for the three side seams of the continuous casting slab group under the condition of placement, and the welding process of vacuum electron beam welding is used for the last side seam in a vacuum environment

Method used

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  • A kind of large-thickness slab manufacturing process method
  • A kind of large-thickness slab manufacturing process method
  • A kind of large-thickness slab manufacturing process method

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Embodiment 1

[0029]Embodiment 1: Production of 180mm thick Q345B steel plate

[0030] 1) Process two 300mm thick Q345B continuous casting slabs by milling machine to remove surface oxide scale, oil stains, etc. to achieve surface cleanliness, and process the two slabs to the same size.

[0031] 2) The three sides of the surface-processed continuous casting slab to be welded are processed by flame cutting method, the groove depth is 25mm, and the groove angle is 30°.

[0032] 3) After the processed continuous casting slabs are stacked together, they are rotated 90° and placed vertically, aligned and clamped.

[0033] 4) Adopt the welding method of gas shielded welding to carry out bottom welding on the edge seams of the three sides of the continuous casting slab that have processed the groove, the diameter of the welding wire is 2.0mm, the welding voltage is 20V, the welding current is 200A, and the welding speed is 300mm / min , the dry elongation of the welding wire is 25mm, and the shield...

Embodiment 2

[0045] Embodiment 2: Production of 400mm thick Q345B extra thick steel plate

[0046] 1) Process the produced three 300mm thick Q345B continuous casting slabs with a milling machine to remove surface oxide scales, oil stains, etc. to clean the surface and process them into the same size.

[0047] 2) The three sides of the surface-processed continuous casting slab to be welded are processed by flame cutting method, the groove depth is 30mm, and the groove angle is 30°.

[0048] 3) After the processed blanks are stacked together, they are rotated 90° and placed vertically, aligned and clamped.

[0049] 4) Adopt the welding method of gas shielded welding, and perform bottom welding on the six side seams with processed grooves on the three sides of the blank. The diameter of the welding wire is 2.0mm, the welding voltage is 20V, the welding current is 200A, the welding speed is 500mm / min, and the welding wire The dry elongation is 25mm, and the protective gas is CO 2 , the prote...

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Abstract

The invention discloses a big-thickness slab manufacturing technique belonging to the technical field of ferrous metallurgy. According to the technique, more than two continuous casting slab blanks are overlapped, and then the four sides of the blanks are combined and welded by using a combined welding technique of gas shielded welding, submerged-arc welding and electron-bombardment welding so as to form one big-thickness slab. The invention breaks through the limit of complex manufacturing process, no guarantee in inner quality or low production efficiency in the traditional big-thickness slab manufacturing technique and provides a method for producing a big-thickness slab with high quality and high efficiency by using the traditional continuous cast slab blanks, and the method is simple in operation, small in investment, high in production efficiency, flexible in organization form, capable of well satisfying the requirement of a raw material used for producing the big-thickness slab with high piece weight and high compression ratio and realizing mass industrial production, and especially suitable for the production of the big-thickness slab with the thickness of more than 600mm, and is widely applied to the manufacturing of high-quality super-thick steel plates used for various important technique equipment.

Description

technical field [0001] The invention belongs to the field of iron and steel metallurgy, and relates to a manufacturing process method of a large-thickness slab. Background technique [0002] Large-thickness slabs refer to blanks with a thickness greater than 400mm, which are mainly used in the production and manufacture of high-quality extra-thick steel plates for major technical equipment industries such as heavy machinery, molds, high-rise buildings, pressure vessels, and electric power. There are many large-thickness slabs in China. It adopts the form of large die-casting steel ingot, electroslag remelted slab and so on. [0003] The traditional die-cast billet production process has low efficiency, high energy consumption, and low billet yield. At the same time, due to the large cross-sectional size of die-cast steel ingots, it is difficult to eliminate core quality defects, which cannot meet the quality requirements of high-quality extra-thick steel plates. Large slabs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K28/02B23K33/00
Inventor 陈启祥孙卫华马兴云赵乾崔健李敏王金华
Owner JIGANG GRP
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