Hydraulic engineering composite plate and preparation method for same

A technology for water conservancy projects and composite boards, which is applied in metal processing equipment, chemical instruments and methods, manufacturing tools, etc., can solve the problems of high temperature, decreased mechanical properties of substrates, surface oxidation, etc., and achieves high mechanical properties and uniform surface hardness. Effect

Active Publication Date: 2012-07-04
太原钢铁(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Due to the S31803 dual-phase steel composite steel plate, stress relief heat treatment is required after explosive welding. Due to the inherent characteristics of dual-phase steel, the ratio of the two phases must be readjusted at a heat treatment temperature of 1000-1050 ° C, and water mist cooling is used after the furnace to ensure The two-phase ratio of dual-phase steel, due to the long time and high temperature of the clad steel plate, the mechanical properties of the substrate will be reduced and the surface oxidation will be serious. Uneven cooling will cause the formation of harmful phases in the stainless steel and cracks during processing.

Method used

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  • Hydraulic engineering composite plate and preparation method for same
  • Hydraulic engineering composite plate and preparation method for same

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preparation example Construction

[0051] The present invention also provides a kind of preparation method of composite board, comprises the following steps:

[0052] (1) Treat the surface of the substrate and the double board;

[0053] (2) Explosive welding is carried out to the processed base plate and double plate;

[0054] (3) Carry out repair welding to the clad plate after explosive welding; and

[0055] (4) Heat-treating the composite plate in step (3).

[0056] Wherein the treatment described in the step (1) is grinding, preferably, the surface roughness of the ground substrate and doubler plate is greater than 25 μm. Preferably, the step (1) also includes matching the length and width of the base plate and the doubler plate, preferably the length and width of the doubler plate are respectively 90 mm ± 10 mm larger than the length and width of the base plate. The explosive used in the explosive welding described in step (2) is ammonium oil explosive , explosives are placed on the doubler plate, prefe...

Embodiment 1

[0090] 1. Match

[0091] The substrate that meets the national standard GB / T1591-2008 is used as the substrate, and the following components are contained in terms of mass percentage: C: 0.17%; Si: 0.45%; Mn: 1.50%; Nb: 0.02%; V: 0.13%; Ti: 0.18%; Cr: 0.26%; N: 0.009%; Mo: 0.09%; Ni: 0.45%; P≤0.030%; S≤0.030%; the balance is iron and unavoidable impurities;

[0092] The composite board that meets the GB3280-2007 standard contains the following components in terms of mass percentage: C: 0.09%; Si: 1.20%; Mn: 2.60%; Nb: 0.18%; Cr: 19.3%; N: 0.24% ; Ni: 8.50%; P≤0.035%; S≤0.035%, the balance is iron and unavoidable impurities

[0093] Comparing the length and width of the two, the base plate is 10050mm long, 1500mm wide, and 26mm thick, the double plate is 10150mm long, 1580mm wide, and 4mm thick, and the length of the double plate is 100mm longer than that of the base plate; Width 80mm;

[0094] 2. Grinding the surface

[0095] Remove the oxides and sundries on the explosive...

Embodiment 2

[0106] 1. Match

[0107] The substrate that meets the national standard GB / T1591-2008 is used as the substrate, and contains the following components in terms of mass percentage: C: 0.14%; Si: 0.35%; Mn: 1.00%; Nb: 0.01%; V: 0.11%; Ti: 0.13%; Cr: 0.18%; N: 0.006%; Mo: 0.04%; Ni: 0.35%; P≤0.025%; S≤0.025%; the balance is iron and unavoidable impurities;

[0108] The compound board that meets the GB3280-2007 standard contains the following components in terms of mass percentage: C: 0.12%; Si: 1.50%; Mn: 3.00%; Nb: 0.20%; Cr: 20.0%; N: 0.30% ; Ni: 10.50%; P≤0.055%; S≤0.040%, the balance is iron and unavoidable impurities

[0109] Comparing the length and width of the two, the base plate is 10050mm long, 1500mm wide, and 26mm thick, and the double plate is 10140mm long, 1590mm wide, and 4mm thick, and the length of the double plate is 90mm longer than that of the base plate; Width 90mm;

[0110] 2. Grinding the surface

[0111] Remove the oxides and sundries on the explosive j...

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Abstract

The invention relates to a hydraulic engineering composite plate and a preparation method for the same. The composite plate comprises a base plate and a compound plate, and is characterized in that the base plate is a structural carbon steel plate or a vessel plate, the compound plate is a niobium nitrogen austenite stainless steel plate, the base plate and the compound plate are combined to form the composite plate through atoms, and the composite plate is mainly used for a sand washing pipe and a gate. The preparation method for the composite plate includes the steps: firstly treating the surfaces of the base plate and the compound plate; explosively welding the treated base plate and the treated compound plate; additionally welding the composite plate after explosive welding; and performing heat treatment for the composite plate after additional welding. The shear strength of the obtained composite plate ranges from 280MPa to 330MPa, and the surface hardness of the obtained composite plate ranges from 275N / mm2 to 285N / mm2.

Description

technical field [0001] The invention relates to a composite plate for water conservancy engineering and a manufacturing method thereof, in particular to an atom-bonded stainless steel composite plate and a manufacturing method thereof. Background technique [0002] At present, the surface hardness of stainless steel composite plates for hydraulic engineering is required to be HB270-290. Large-scale water conservancy projects mostly use 2205 dual-phase steel composite steel plates. After explosive welding, stress relief heat treatment is required for them. However, due to the inherent characteristics of dual-phase steel, it must Readjust the ratio of the two phases at the heat treatment temperature of 1000-1050 ° C, and use water mist cooling after the furnace to ensure the ratio of the two phases of the dual-phase steel. Due to the long time and high temperature of the clad steel plate, the mechanical properties of the substrate are reduced and the surface oxidation is seriou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/08B23K20/227B32B15/01B32B15/18
Inventor 卫世杰王虎成郭励武白志伟王海峰刘云飞李玉平
Owner 太原钢铁(集团)有限公司
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