Abstract

2233 slag system is used; a 08AL steel/316 stainless steel composite slab having a total thickness of 70 mm is produced; the composite slab is cooled to room temperature and conveyed to a heating furnace for heating at a temperature of 1,150-1,250°C for greater than or equal to 240 min, the slab exits the heating furnace at a temperature greater than or equal to 1,100°C, and rolling is controlled in two stages; for rolling in a recrystallization zone, the number of rolling passes is reduced and the reduction ratio of the rolling passes is increased; and the residence time after the rolling is prolonged, the total reduction rate in a non-recrystallization zone is greater than 50%, the reduction rate of the final pass is less than or equal to 5%, and the rolled piece exits a rolling mill and is then cooled by laminar flow. The composite plate of the present invention has interface shear strength greater than or equal to 115 MPa and tensile strength greater than or equal to 325 MPa, and the number of repeated bending is greater than or equal to 7.

IPC Classes  ?

• B21B 1/38 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets
• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
• C22B 9/18 - Electroslag remelting
• C22C 33/04 - Making ferrous alloys by melting

Abstract

2233; after slag melting temperature rising time is reached, taking the electrode away from a slag surface, cutting off a high voltage, lifting the electrode, replacing same with a consumable electrode, adjusting a smelting current, gradually changing the smelting current to a normal smelting current within 8 minutes, and if the consumable electrode is used for arc striking and slagging, after the slag is subjected to dissolved clarification, gradually increasing the current for normal refining; and when the electrode is melted by less than or equal to 100 mm in the late period, gradually decreasing the current to a filling current for filling and feeding; and the slag directly entering a heating furnace after electroslag remelting, and then directly entering a rolling mill for rolling, wherein the interfacial shear strength of a composite board is greater than or equal to 135 MPa, the tensile strength is greater than or equal to 345 MPa, and the number of instances of repeated bending is greater than or equal to 6.

IPC Classes  ?

• B22D 7/02 - Casting compound ingots of two or more different metals in the molten state, i.e. integrally cast
• B22D 23/10 - Electroslag casting
• C22B 9/18 - Electroslag remelting

Abstract

A method for rolling a 1050 aluminum/08AL steel composite sheet, comprising: S1), placing a rolled aluminum coil and a rolled steel coil on two uncoilers for uncoiling, respectively; S2), after the uncoiling, using NaOH and HCl solutions for cleaning, respectively; S3), performing mechanical treatment on surfaces to be combined of the aluminum sheet and the steel sheet for 10-15s by using a rotating steel wire brush method; S4), placing the aluminum sheet and the steel sheet in an acetone solution for ultrasonic cleaning for 2-3min; S5), pre-stretching or pre-compressing the aluminum sheet and steel sheet subjected to surface treatment; S6), welding edges of the pre-stressed aluminum sheet and steel sheet; S7) preheating the welded steel sheet and aluminum sheet before rolling, and then performing hot rolling compounding; and S8) performing annealing treatment in a continuous annealing furnace. According to the described method, the metallic aluminum sheet and steel sheet are combined together by means of hot rolling compounding, the interfacial shear strength is greater than or equal to 90 MPa, and the number of repeated bending times is greater than or equal to 10.

IPC Classes  ?

• B21B 1/38 - Metal rolling methods or mills for making semi-finished products of solid or profiled cross-sectionSequence of operations in milling trainsLayout of rolling-mill plant, e.g. grouping of standsSuccession of passes or of sectional pass alternations for rolling sheets of limited length, e.g. folded sheets, superimposed sheets
• B21B 47/00 - Auxiliary arrangements, devices or methods in connection with rolling of multi-layer sheets of metal
• B21B 37/00 - Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
• B21B 45/02 - Devices for surface treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
• C22C 21/02 - Alloys based on aluminium with silicon as the next major constituent
• C22C 21/00 - Alloys based on aluminium
• C22C 38/02 - Ferrous alloys, e.g. steel alloys containing silicon
• C22C 38/04 - Ferrous alloys, e.g. steel alloys containing manganese
• C22C 38/06 - Ferrous alloys, e.g. steel alloys containing aluminium
• C21D 8/02 - Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of plates or strips
• C22F 1/04 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
• C22F 1/043 - Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with silicon as the next major constituent