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A kind of induction heating heat treatment process method of composite steel plate

A technology of induction heating and clad steel plate, which is applied in the field of steel rolling heat treatment, can solve the problems of difficult shaping of extra-thick clad plate, push up the cost of clad plate, consume large energy, etc., and achieve the effect of improving structure and performance, increasing efficiency and saving energy

Active Publication Date: 2018-03-09
CHINA FIRST HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the overall heat treatment is carried out on the clad steel plate, it is often difficult to take into account the performance requirements of the base material and the cladding layer at the same time, and some properties of the base material or the cladding layer will inevitably be sacrificed; in addition, the overall heating and heat treatment process consumes a lot of energy, pushing up the composite The cost of the board, and the warpage of the board after the overall heat treatment is too large, which makes it difficult to shape the extra-thick composite board

Method used

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  • A kind of induction heating heat treatment process method of composite steel plate
  • A kind of induction heating heat treatment process method of composite steel plate
  • A kind of induction heating heat treatment process method of composite steel plate

Examples

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Effect test

Embodiment 1

[0030] Example 1 Induction heating heat treatment of 304 / Q345R clad steel plate

[0031] The size of the hot-rolled composite steel plate is: length 400 mm, width 200 mm, total thickness 30 mm, base material is 25 mm thick Q345R, cladding is 5 mm thick 304 stainless steel. The steel plate is placed vertically, the lower end of the steel plate is fixed with a vise, the coil is located on one side of the cladding, and placed at the lower end of the slab, the distance between the coil and the cladding surface is 8.0 mm, the heating voltage is 420 V, the magnetic field frequency is 8.2 kHz, and the induced current is 320 A, and the heating power is 134.4 kW. When heating, the coil is preheated first, and the preheating time is 5s, and then the coil is moved at a speed of 80mm / min, and the moving direction is from bottom to top. Perform solution treatment.

[0032] Cut the metallographic sample on the composite slab after heat treatment, use the GB / T 4334 method A oxalic acid ele...

Embodiment 2

[0035] Example 2 Induction heating heat treatment of 304 / Q345R clad steel plate

[0036] The size of the clad steel plate is 400 mm long, 200 mm wide, and 30 mm in total thickness, the base material is Q345R with a thickness of 25 mm, and the cladding is 304 stainless steel with a thickness of 5 mm. Place the steel plate vertically, fix the lower end of the steel plate with a vise, place the coil on one side of the coating, and place it at the lower end of the slab, the distance between the coil and the surface of the coating is 8.0mm, the heating voltage is 420V, the magnetic field frequency is 8.2kHz, and the induced current is 320A, heating power is 134.4kW. When heating, the coil is preheated first, and the preheating time is 5s, and then the coil is moved at a speed of 100mm / min, and the moving direction is from bottom to top. The coating is solution treated.

[0037] The slab after heat treatment was cut into metallographic samples, and the intergranular corrosion resi...

Embodiment 3

[0039] Example 3 Induction heating heat treatment of 304 / Q345R clad steel plate

[0040] The size of the clad steel plate is 400 mm long, 200 mm wide, and 30 mm in total thickness, the base material is Q345R with a thickness of 25 mm, and the cladding is 304 stainless steel with a thickness of 5 mm. Place the steel plate vertically, fix the lower end of the steel plate with a vise, place the coil on one side of the coating, and place it at the lower end of the slab, the distance between the coil and the surface of the coating is 8.0mm, the heating voltage is 420V, the magnetic field frequency is 8.2kHz, and the induced current is 320A, heating power is 134.4kW. When heating, the coil is preheated first, and the preheating time is 5s, and then the coil is moved at a speed of 120mm / min, and the moving direction is from bottom to top. The coating is solution treated.

[0041] The slab after heat treatment was cut into metallographic samples, and the intergranular corrosion resi...

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Abstract

The invention discloses an induction heat treatment process method of a composite steel plate, and belongs to the technical field of steel rolling heat treatment. According to an induction heating device, a bracket capable of vertically moving is arranged at the upper ends of conveying rollers of a conveying machine, a plurality of induction coils are arranged below the bracket in the horizontal direction, a plurality of rows of exhaust pipes are perpendicularly arranged at the side end of the bracket, nozzles are arranged at the lower ends of the exhaust pipes, a plurality of rows of water draining pipes are arranged on one sides of the exhaust pipes, nozzles are arranged at the lower ends of the water draining pipes, and the direction of the nozzles of the exhaust pipes and the direction of the nozzles of the water draining pipes are opposite to the direction of the induction coils. The method comprises the steps that firstly, a composite slag is mounted at the upper ends of the conveying rollers, and the bracket is adjusted to enable the induction coils and the composite slab to keep a certain distance; secondly, the power of the induction coils, the distance between the induction coils and coatings and the moving speed of the induction coils are adjusted, and the coatings made of different materials and with different thicknesses can be subject to rapid solid-solution treatment or quenching heat treatment; and thirdly, the induction heat treatment process comprises an induction preheating stage, the high-temperature solid-solution stage and water cooling or air cooling quenching treatment.

Description

technical field [0001] The invention relates to an induction heating heat treatment process for a composite steel plate, belonging to the technical field of steel rolling heat treatment. Background technique [0002] Composite steel plates generally use ordinary carbon steel or container steel as the base material, and stainless steel, wear-resistant steel or other high-alloy steel as the cladding layer, and are combined into one by explosion, explosion + hot rolling, hot rolling and other methods. The composite steel plate comprehensively utilizes the functionality of the cladding and the mechanical properties of the base material, saves the expensive cladding, reduces the cost of equipment manufacturing, and improves the overall performance of the equipment. It can be widely used in chemical industry, petroleum, seawater desalination, Shipbuilding, metallurgy and other fields. [0003] At present, stainless steel clad plates or wear-resistant clad plates, whether through ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D1/42C21D9/00
CPCC21D1/42C21D9/0081Y02P10/25
Inventor 何毅刘会云张心金何冰冷张留军祝志超郭秀斌李萌蘖
Owner CHINA FIRST HEAVY IND