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A method for local heat treatment of plates

A local heat treatment and plate technology, applied in heat treatment furnaces, heat treatment equipment, furnaces, etc., can solve the problems of the base material, melting zone and heat-affected zone that the performance cannot be optimal, and three temperatures are applied, so as to achieve a clean and pollution-free process , Guarantee processing quality, improve the effect of energy utilization

Active Publication Date: 2017-11-21
QINGDAO SCAN EQUIP TECH CO LTD
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AI Technical Summary

Problems solved by technology

The overall heat treatment cannot apply three temperatures to the base metal, melting zone and heat-affected zone, so only a compromise temperature can be found, so that the properties of the base metal, melting zone and heat-affected zone cannot be optimal

Method used

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  • A method for local heat treatment of plates

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Embodiment Construction

[0024] 1. A heating method for wire heating plate heat treatment and bending forming, characterized in that the steps of the method are:

[0025] Step 1: Divide the tailored welded blank 1 into base metal zone I, heat-affected zone II, fusion zone III, heat-affected zone VI and base metal zone V along the x direction. The main point is that the weld part is directly divided into melting zone III, 1-10mm on both sides of melting zone III are heat-affected zone II and heat-affected zone VI respectively, and the remaining parts are base metal zone I and base metal zone V.

[0026] Step 2: Design the position of the heating line 2a in the heat-affected zone II, design the position of the heating line 2b in the melting zone III, and design the position of the heating line 2c in the heat-affected zone VI. The main points are the heating line 2a, 2b and 2c are the centerlines of heat-affected zone II, melting zone III and heat-affected zone VI respectively.

[0027] Step 3: Prepare ...

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Abstract

The invention discloses a method for local heat treatment on a panel, and relates to the field of advanced manufacturing. The problem that during local heat treatment on large-breadth spliced and welded plates at present, the mechanical performance cannot reach optimal matching is solved. The method comprises the following steps that firstly, a positive electrode and a negative electrode are arranged on the two sides of a metal plate in the thickness direction correspondingly and communicate with a power source through a wire; secondly, the power source is conducted, current passes through the metal plate through one electrode and then passes through the other electrode to form a loop; thirdly, the panel through which the current passes is heated through resistance heat; fourthly, the electrodes move relative to the metal plate according to a preset heating line; and fifthly, tracking cooling is conducted at the position away from a heating point by a certain distance, and the metal mechanical performance at the heating part is improved.

Description

technical field [0001] The invention relates to the field of advanced manufacturing, in particular to a process method for local heat treatment of plates. Background technique [0002] In the automotive and aerospace fields, large-scale panels are generally tailor-welded structures, and there are melting zones and heat-affected zones in the welds, and the performance is greatly reduced compared with the base metal. Heat treatment is required to improve performance. However, at present, heat treatment is completed through a heat treatment furnace, that is, overall heat treatment. It is easy to ensure that the temperature is uniform throughout the overall heat treatment in the furnace, and it has great advantages when used for heat treatment of materials with consistent initial properties. However, it cannot solve the heat treatment of materials with different initial properties like tailor welded blanks. The reason is that the optimal heat treatment temperature is determin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/46C21D1/40
Inventor 初冠南陈钢林艳丽丁名区任冬亮
Owner QINGDAO SCAN EQUIP TECH CO LTD
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