Double-phase laminated structure steel plate and preparation method thereof

A stacking and organization technology, applied in the field of steel plate manufacturing, can solve the problem that steel cannot be combined at the same time, and achieve the effects of low sensitivity to cold cracks and hot cracks, simple technical route, high strength and toughness matching and wear resistance

Active Publication Date: 2018-08-17
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a dual-phase laminated structure steel plate and its preparation method to solve the problem that the existing steel cannot have two kinds of mechanical properties at the same time, such as good strength and plastic toughness, weldability and plasticity, etc.

Method used

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  • Double-phase laminated structure steel plate and preparation method thereof
  • Double-phase laminated structure steel plate and preparation method thereof
  • Double-phase laminated structure steel plate and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation method of the dual-phase laminated structure steel plate of this embodiment includes:

[0029] (1) Use ferrite welding wire to surfacing a layer of ferrite layer with a certain height on one side of the low carbon steel substrate. The surfacing welding conditions are: wire feeding speed: 5mm / min, welding speed: 300mm / min, arc length Correction: 10, arc thrust: -2.5, distance between centers of each weld bead: 5mm, current: 140A, voltage: 14.3V, shielding gas flow: 25L / min.

[0030] (2) Using the same surfacing welding process parameters, a layer of martensitic layer is surfacing with martensitic stainless steel welding wire on the ferrite layer.

[0031] (3) Repeat the above operation, alternately stacking 6 times. The ferrite surfacing layer accounts for 65% of the entire surfacing layer, and the formed martensitic surfacing layer accounts for 35% of the entire surfacing layer.

[0032] (4) Roll the welded plate in a rolling mill, with a reduction of ...

Embodiment 2

[0035] The preparation method of the dual-phase laminated structure steel plate of this embodiment includes:

[0036] (1) Use ferrite welding wire to surfacing a layer of ferrite layer with a certain height on one side of the low carbon steel substrate. The surfacing welding conditions are: wire feeding speed: 5mm / min, welding speed: 250mm / min, arc length Correction: 10, arc thrust: -2.5, distance between centers of each weld bead: 5mm, current: 160A, voltage: 15V, shielding gas flow: 23L / min.

[0037] (2) Using the same surfacing welding process parameters, a layer of martensitic layer is surfacing with martensitic stainless steel welding wire on the ferrite layer.

[0038] (3) Repeat the above operation, alternately stacking 5 times. The ferrite surfacing layer accounts for 70% of the entire surfacing layer, and the formed martensitic surfacing layer accounts for 30% of the entire surfacing layer.

[0039] (4) Roll the welded plate in a rolling mill, the reduction in each ...

Embodiment 3

[0042] The preparation method of the dual-phase laminated structure steel plate of this embodiment includes:

[0043] (1) Use ferrite welding wire to surfacing a layer of ferrite layer with a certain height on one side of the low carbon steel substrate. The surfacing welding conditions are: wire feeding speed: 5mm / min, welding speed: 350mm / min, arc length Correction: 10, arc thrust: -2.5, distance between centers of each weld bead: 5mm, current: 120A, voltage: 10V, shielding gas flow: 20L / min.

[0044] (2) Using the same surfacing welding process parameters, a layer of martensitic layer is surfacing with martensitic stainless steel welding wire on the ferrite layer.

[0045] (3) Repeat the above operation, alternately stacking 5 times. The ferrite surfacing layer accounts for 60% of the entire surfacing layer, and the formed martensitic surfacing layer accounts for 40% of the entire surfacing layer.

[0046] (4) Roll the welded plate in a rolling mill, with a reduction of 1....

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Abstract

The invention discloses a double-phase laminated structure steel plate and a preparation method thereof, and belongs to the technical field of steel production. The preparation method of the dual-phase laminated structure steel plate comprises the following steps that a first surfacing layer and a second surfacing layer which are alternately distributed are formed through alternately surfacing different first welding wires and second welding wires on a steel substrate, and the double-phase laminated structure steel plate is obtained after the rolling and annealing treatment; and the first welding wires and the second welding wires are selected from one of ferritic welding wires, martensite welding wires and austenite welding wires. The preparation method directly adopts any two of the ferritic stainless steel welding wires, the martensite stainless steel welding wires, the austenite stainless steel welding wires and bainitic stainless steel welding wires to form a double-phase laminated structure by surfacing, the double-phase laminated steel plate with ideal performance can be obtained through rolling and annealing treatment, the process flow is simple, the processing efficiency is high, full automatic production is easy to realize, the production cost is saved, and the effective control over the microstructure and macroscopic mechanical properties of the steel plate is realized.

Description

technical field [0001] The invention relates to the technical field of steel plate manufacturing, in particular to a steel plate with a dual-phase laminated structure and a preparation method thereof. Background technique [0002] Steel with high strength and high toughness has always been the tireless pursuit of the majority of scientific researchers and technicians, and it is also an urgent need for steel structural parts to cope with the deteriorating working environment. However, the traditional steel prepared by smelting, rolling and heat treatment has uniform internal grain size and close mechanical properties in each region. The general method of grain refinement cannot take into account both strength and ductility, which greatly limits the steel. application range. Contents of the invention [0003] The object of the present invention is to provide a steel plate with dual-phase laminated structure and its preparation method, so as to solve the problem that the exi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23P15/00B23K9/04B23K103/04
CPCB23K9/04B23P15/00
Inventor 李达张乔杨先锋陈兵
Owner SOUTHWEST JIAOTONG UNIV
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