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Magnesium alloy plate strip different-temperature different-speed coordinated rolling device and application

A magnesium alloy plate and isothermal technology, which is applied in the driving device of metal rolling mill, metal rolling, metal rolling, etc., can solve the problem of difficult to achieve continuous production, difficult to control the flatness of plate shape, damage to the rolling mill, etc. The problem is to improve the bending problem of the plate shape, the design of the device is simple and ingenious, and the effect of improving the edge cracking of the strip rolling

Pending Publication Date: 2022-03-25
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, both rolling processes have certain limitations: the equal-channel radial-angle rolling process is complicated and it is difficult to realize continuous production; the plate shape of asynchronous rolling is often bent to the side of the slow-speed roll, and the flatness of the plate shape is difficult to control
Although this method can improve the profile bending problem of asynchronous rolling, the excessive offset of the upper and lower rolls will damage the rolling mill

Method used

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  • Magnesium alloy plate strip different-temperature different-speed coordinated rolling device and application
  • Magnesium alloy plate strip different-temperature different-speed coordinated rolling device and application
  • Magnesium alloy plate strip different-temperature different-speed coordinated rolling device and application

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiment one, as figure 1 Shown is a coordinated rolling device for magnesium alloy plates and strips at different temperatures and speeds. The device includes a roll 2, a frame 1, a roll induction heating system and a roll speed adjustment system; The upper induction coil 31 and the upper temperature measuring probe 41 on the periphery, and the lower induction coil 31 and the lower temperature measuring probe 41 arranged on the periphery of the lower roll 22; the upper and lower induction coils are electrically connected to the heating system console 10 respectively; The above-mentioned induction coil is a U-shaped induction coil, which is half surrounded by the outer circumference of the roll. The roll speed adjustment system includes a motor 8, a reducer 7, and a shaft coupling 6 that are electrically connected in sequence; the motor 8, the reducer 7, and the shaft coupling 6 are provided with two groups, which are respectively connected with the upper and lower ro...

Embodiment 2

[0034]Taking ZK60 as an example, the bending degree and microstructure properties of the plates obtained by rolling deformation using the device and process method of the present invention were compared with those obtained without using the device and process method of the present invention.

[0035] Test 1: use device and technique of the present invention, concrete steps are as follows:

[0036] 1) Turn on the induction heating of the upper and lower rolls, preheat the temperature of the upper roll to 100°C, and preheat the temperature of the lower roll to 300°C, so that the temperature ratio of the upper and lower rolls is 1:3;

[0037] 2) Set the speed of the upper roll to 10m / min, and the speed of the lower roll to 5m / min, so that the speed ratio of the upper and lower rolls is 2:1;

[0038] 3) Preheat the 20mm thick ZK60 sheet to 300°C and keep it for 30min;

[0039] 4) The diameter of the roll is 350mm, and the deformation is 50%; rolling is carried out.

[0040] Comp...

Embodiment 3

[0047] Taking the Mg-Nd-Zn-Zr alloy as an example, the plate shape bending and microstructure properties of the plates obtained by rolling deformation using the device and process method of the present invention are compared with those obtained without the device and process method of the present invention.

[0048] Test 2: use device and technique of the present invention, concrete steps are as follows:

[0049] 1) Turn on the induction heating of the upper and lower rolls, preheat the temperature of the upper roll to 250°C, and preheat the temperature of the lower roll to 450°C, so that the temperature ratio of the upper and lower rolls is 1:1.8;

[0050] 2) Set the speed of the upper roll to 10m / min, and the speed of the lower roll to 5m / min, so that the speed ratio of the upper and lower rolls is 2:1;

[0051] 3) Preheat the 25mm thick ZK60 sheet to 450°C and keep it for 50min;

[0052] 4) The diameter of the roll is 350mm, and the deformation is 40%; rolling is carried o...

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Abstract

The invention provides a magnesium alloy plate strip different-temperature different-speed coordinated rolling device and application, and belongs to the field of magnesium alloy machining. According to the different-temperature and different-speed coordinated rolling device, a roller induction heating system and a roller speed adjusting system are arranged on a rolling mill; the roller induction heating system comprises an induction coil, and the heating temperature of the upper temperature measuring probe is controlled by a heating system console. The roller speed adjusting system comprises a motor, a speed reducer, a coupler and the like which are respectively connected with the upper roller and the lower roller; the temperatures and the speeds of the upper roller and the lower roller are independently adjusted through a master console. According to the device, the different-speed ratio and the different-temperature ratio of the upper roller and the lower roller can be set according to needs, different-temperature and different-speed rolling is conducted on a magnesium alloy plate, and the magnesium alloy plate strip of a thickness-direction gradient structure is prepared. According to the device and the process, the two problems that in the current magnesium alloy field, a gradient structure in the thickness direction of a plate strip is difficult to prepare, and asymmetrical rolling plate type bending is serious are solved at the same time. And technical support is provided for future application expansion of the wrought magnesium alloy.

Description

technical field [0001] The invention relates to a coordinated rolling device and application of a magnesium alloy plate and strip at different temperatures and speeds, belonging to the field of magnesium alloy processing. Background technique [0002] Wrought magnesium alloy sheets and strips are widely used in many lightweight fields such as aerospace, national defense and military industry, and automobile transportation. However, the increasingly complex service environment puts forward higher requirements on the structure and properties of magnesium alloy plates and strips. Among them, the strong basal texture and the gradient structure of plates and strips along the thickness direction are difficult to prepare. Two serious problems limit the application expansion of wrought magnesium alloys. [0003] As we all know, the performance of magnesium alloy is closely related to its microstructure, and its microstructure is directly related to the temperature in the plastic de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B3/00B21B37/46B21B37/74
CPCB21B3/00B21B37/46B21B37/74B21B2267/12B21B2275/05Y02P10/25
Inventor 王文珂张文丛陈文振杨建雷崔国荣
Owner HARBIN INST OF TECH AT WEIHAI
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