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The mg-al-si alloy system coated steel plate with wide hot forming heating process window and its preparation and hot stamping forming process

A hot stamping forming, mg-al-si technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problem of premature brittle fracture of cold-formed parts, inability to effectively absorb energy, and disadvantageous passengers. Safety and other issues, to achieve the effect of improving cold bending performance, increasing resistance to hydrogen-induced delayed cracking, and reducing wear of welded joints

Active Publication Date: 2022-04-15
MAANSHAN IRON & STEEL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the strength increases, the corresponding plasticity and toughness will decrease. The three-point bending performance (test standard reference VDA238-100) is an important index for evaluating the plasticity and toughness of hot-formed steel.
Insufficient cold bending performance (bending limit angle) of materials or parts used in automobiles will lead to premature brittle fracture of parts during vehicle collision, which cannot effectively absorb the energy generated by the collision, and is not conducive to the safety of occupants

Method used

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  • The mg-al-si alloy system coated steel plate with wide hot forming heating process window and its preparation and hot stamping forming process
  • The mg-al-si alloy system coated steel plate with wide hot forming heating process window and its preparation and hot stamping forming process
  • The mg-al-si alloy system coated steel plate with wide hot forming heating process window and its preparation and hot stamping forming process

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Embodiment Construction

[0037] The present invention will be described in detail below in conjunction with the embodiments and the accompanying drawings.

[0038] Firstly, the present invention provides a Cr alloy system hot-formed coated steel plate, in which the cold bending performance and delayed cracking resistance are improved by controlling the decarburization layer and adding trace amounts of Nb, V and other alloying elements. In this embodiment, a slab with the required composition is provided. As an example, the composition of the reference substrate and the composition of the substrate of the present invention are shown in Table 1.

[0039] Table 1 Chemical composition of steel plate, wt%

[0040]

[0041] Hot-rolled, cold-rolled and hot-dipped annealed hot-formed steel slabs with the same composition system, through the atmosphere in the heating furnace and controlled rolling and controlled cooling technology, the thickness of the decarburized layer of the hot coil is 8-15 μm (see Fi...

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Abstract

The invention discloses a Mg-Al-Si alloy coated steel plate with a wide thermal forming heating process window and its preparation and hot stamping forming process. The liquid bath used for the coated steel strip contains the following raw materials in weight percentage: 5-11% Si, 0-4% Fe, 0.4-3% Mg, the rest is Al and impurities inherent in processing, the thickness of the coating layer is 10-33μm, the coating, cold bending, hydrogen resistance of the prepared hot stamping parts Excellent delayed cracking performance and low loss of welded joints.

Description

technical field [0001] The invention belongs to the technical field of iron and steel preparation, and in particular relates to a Mg-Al-Si alloy system coated steel plate with a wide hot forming heating process window and its preparation and hot stamping forming process. Background technique [0002] In recent years, high-strength thinning, energy saving and emission reduction have been the main development trends of the automotive industry. Among them, hot stamping is a common way to achieve high-strength products. It is a combination of heat treatment and high-temperature forming to achieve high-strength products. . Commonly used hot stamping products mainly include: front and rear door left and right anti-collision bars (beams), front and rear bumpers, A-pillar reinforcement plates, B-pillar reinforcement plates, C-pillar reinforcement plates, middle channel, roof reinforcement beams and other safety structures These hot stamping products have the characteristics of high...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C2/12C23C2/40C22C38/04C22C38/02C22C38/06C22C38/28C22C38/26C22C38/24C22C38/22C21D8/02C22C21/02
CPCC23C2/12C23C2/40C22C38/04C22C38/02C22C38/06C22C38/28C22C38/26C22C38/24C22C38/22C21D8/0205C21D8/0247C22C21/02
Inventor 陈乐崔磊詹华刘永刚周世龙晋家春孙立王蕾谷海荣陈德顺
Owner MAANSHAN IRON & STEEL CO LTD