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A processing method for suppressing edge cracking during rolling of brittle materials

A technology of brittle material and processing method, which is applied in the processing field of suppressing edge cracking during rolling of brittle materials, can solve the problems of reduced production efficiency, reduced quality of strip edge, broken strip accident, etc., and achieves complete defect-free surface quality , Reduce the effect of broken belt injury accidents and overcome edge cracking

Active Publication Date: 2018-05-18
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Strip edge cracks directly lead to the decline of the edge quality of the strip, which reduces the yield of the steel, resulting in a huge waste of resources, and even serious accidents that may cause strip breakage; cold rolling generally withstands tens of tons of tension and Under the condition of high speed of hundreds of meters per minute, the huge impact caused by the broken belt will cause serious damage to the production equipment, resulting in a decrease in production efficiency and incalculable huge economic losses.
So far, there is no report on the use of edge welding to suppress the edge cracking behavior of brittle materials

Method used

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  • A processing method for suppressing edge cracking during rolling of brittle materials
  • A processing method for suppressing edge cracking during rolling of brittle materials
  • A processing method for suppressing edge cracking during rolling of brittle materials

Examples

Experimental program
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Effect test

Embodiment 1

[0032] (1) Pretreatment: Put the 0.5mm thick Fe-6.5wt.% Si high silicon steel alloy sheet into the flat fixture in the warm box-type resistance furnace, the temperature of the box-type resistance furnace is 850 ° C, the holding time is 5min, and then Take it out, press it with two unheated stainless steel plates to cool, cool to room temperature, then pickle the alloy sheet to remove the surface oxide scale; use a grinder to polish the edge of the alloy sheet and the edge of the plastic material.

[0033] (2) The plastic material is 304 stainless steel.

[0034] (3) Connection: use laser welding to realize the connection between Fe-6.5wt.% Si high-silicon steel and 304 stainless steel; use a special mold to dock the warm-rolled sheet after the pickling and polishing with the plastic material; laser welding Preheating before welding and slow cooling after welding are adopted. The preheating temperature is 150°C. After welding, asbestos is used to wrap the welded parts; The las...

Embodiment 2

[0038] (1) Pretreatment: Put the 0.5mm thick Fe-6.5wt.% Si high silicon steel alloy sheet into the flat fixture in the warm box-type resistance furnace, the temperature of the box-type resistance furnace is 850 ° C, the holding time is 5min, and then Take it out, press it with two unheated stainless steel plates to cool, cool to room temperature, then pickle the alloy sheet to remove the surface oxide scale; use a grinder to polish the edge of the alloy sheet and the edge of the plastic material.

[0039] (2) The plastic material is non-oriented silicon steel sheet of Baosteel brand B50A470.

[0040] (3) Connection: use laser welding to realize the connection between Fe-6.5wt.% Si high silicon steel and B50A470 non-oriented silicon steel sheet; Butt jointing; laser welding adopts preheating before welding and slow cooling after welding. The preheating temperature is 150 ° C. After welding, asbestos is used to wrap the welded parts; For side welding, the laser welding power is...

Embodiment 3

[0044] (1) Pretreatment: Put the 0.5mm thick Fe-6.5wt.% Si high silicon steel alloy sheet into the flat fixture in the warm box-type resistance furnace, the temperature of the box-type resistance furnace is 850 ° C, the holding time is 5min, and then Take it out, press it with two unheated stainless steel plates to cool, cool to room temperature, then pickle the alloy sheet to remove the surface oxide scale; use a grinder to polish the edge of the alloy sheet and the edge of the plastic material.

[0045] (2) The plastic material is non-oriented silicon steel sheet of Baosteel brand B50A800.

[0046] (3) Connection: Laser welding is used to realize the connection of Fe-6.5wt.% Si high-silicon steel and the non-oriented silicon steel sheet of B50A800; the warm-rolled thin plate after the pickling and polishing is docked with the plastic material by using a special mold; Laser welding adopts preheating before welding and slow cooling after welding. The preheating temperature is ...

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Abstract

The invention provides a method for restraining edge cracking of a fragile material in the rolling process. The method is characterized by comprising the steps that the two sides of a fragile material alloy sheet are connected with a material with certain strength and plasticity, so that the plasticity machining capacity of the edge is reinforced; firstly, warm rolling is conducted on a composite board through a rolling machine, and then cold rolling is conducted at the room temperature; and finally the alloy sheet excellent in surface quality and free of edge cracking phenomenon is obtained. According to the method, the technology of welding a plastic material to the edge is adopted, the edge, prone to cracking, of the fragile material is reinforced, the problem of edge cracking of the fragile material in the cold rolling process is solved, and the fragile material alloy sheet which is intact, free of defect and excellent in surface quality is obtained. Meanwhile, through the technology of welding the plastic material to the edge, the production yield of the fragile material alloy sheet is increased, and the possibility of belt breakage and injury accidents caused by edge cracking in the continuous production process is substantially decreased.

Description

technical field [0001] The invention relates to the technical field of metal material preparation, in particular to a processing method capable of suppressing edge cracking during rolling of brittle materials. Background technique [0002] Under the action of external force (such as stretching, impact, etc.), the material that only produces a small deformation, that is, breaks and fractures, is called a brittle material. Typical brittle materials in the field of metal materials include Ti 3 Al-based alloys, TiAl-based alloys, Ti 2 AlNb-based alloy, Ni 3 Al-based alloy, Fe 3 Al-based alloy and Fe-6.5wt.% Si high silicon steel. [0003] Ti 3 Al-based alloys, TiAl-based alloys and Ti 2 AlNb-based alloys have low density (3.8-5.8g / cm 3 ), high temperature, high strength, high steel, and excellent oxidation resistance, creep resistance, etc., can reduce the weight of structural parts by 35-50%. Ni 3 Al-based alloy, MX-246 has good corrosion resistance, wear resistance an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21B3/02
CPCB21B3/02
Inventor 叶丰张豹梁永锋石祥聚林均品温识博刘斌斌
Owner UNIV OF SCI & TECH BEIJING