Roller roller-sleeve extrusion and vibration casting production method

A roll sleeve and casting production technology, applied in the field of roll production, can solve the problems of low service life of the roll, and achieve the effects of improving the density of the roll, improving the shrinkage and porosity, and improving the service life of the roll.

Inactive Publication Date: 2018-08-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For this reason, the present invention will solve the problem of low service life of rolls in the prior art, thereby providing a roll sleeve extrusion vibration casting production method capable of producing roll sleeves with high service life

Method used

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  • Roller roller-sleeve extrusion and vibration casting production method
  • Roller roller-sleeve extrusion and vibration casting production method
  • Roller roller-sleeve extrusion and vibration casting production method

Examples

Experimental program
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Effect test

Embodiment 1

[0039] This embodiment provides a production method for extrusion vibration casting of roll sleeves, comprising the following steps:

[0040] S1: Fill the cavity of the vertical roll sleeve mold with molten metal and seal the cavity;

[0041] S2: Vibrate the roll sleeve mold at the same time or before injecting the molten metal, and vibrate with the molten metal in the mold, the vibration frequency is 200Hz, and the amplitude is 20μm;

[0042] S3: Apply vertical pressure to the molten metal in the solidification process of the roll sleeve mold, and the pressure generated when the vertical pressure is applied to the slab is 10 MPa;

[0043] S4: After the molten metal is completely solidified, keep the vibration and pressure for 10 minutes before opening the mold.

[0044] A specific way of the roller sleeve mold is: comprising a bottom mold 2, a side mold 3 and a fixed cylindrical roll mandrel 6, the bottom of the bottom mold 2 is provided with a The vibration motor 8.

[00...

Embodiment 2

[0049] This embodiment provides a production method for extrusion vibration casting of roll sleeves, comprising the following steps:

[0050] S1: Fill the cavity of the vertical roll sleeve mold with molten metal and seal the cavity;

[0051] S2: Vibrate the roll sleeve mold at the same time or before injecting the molten metal, and vibrate with the molten metal in the mold, the vibration frequency is 250Hz, and the amplitude is 24μm;

[0052] S3: Apply vertical pressure to the molten metal in the solidification process in the roll sleeve mold, and the pressure generated when the vertical pressure is applied to the casting is 25MPa;

[0053] S4: After the molten metal is completely solidified, keep the vibration and pressure for 12 minutes before opening the mold.

[0054] A specific way of the roller sleeve mold is: comprising a bottom mold 2, a side mold 3 and a fixed cylindrical roll mandrel 6, the bottom of the bottom mold 2 is provided with a The vibration motor 8.

[...

Embodiment 3

[0059] This embodiment provides a production method for extrusion vibration casting of roll sleeves, comprising the following steps:

[0060] S1: Fill the cavity of the vertical roll sleeve mold with molten metal and seal the cavity;

[0061] S2: Make the roll sleeve mold vibrate at the same time or before injecting the molten metal, and vibrate with the molten metal in the mold, the vibration frequency is 300Hz, and the amplitude is 30μm;

[0062] S3: Apply vertical pressure to the molten metal in the solidification process of the roller sleeve mold, and the pressure generated when the vertical pressure is applied to the casting is 50MPa;

[0063] S4: After the molten metal is completely solidified, keep the vibration and pressure for 15 minutes before opening the mold.

[0064] A specific way of the roller sleeve mold is: comprising a bottom mold 2, a side mold 3 and a fixed cylindrical roll mandrel 6, the bottom of the bottom mold 2 is provided with a The vibration motor ...

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Abstract

The invention provides a roller roller-sleeve extrusion and vibration casting method. The solidification defect is eliminated through vibration in the metal liquid mold filling and solidifying process, inclusion and gas discharging is promoted, and forming of large network carbide is stopped. Meanwhile, distribution of components of a roller sleeve is uniform, and the problem that due to current high-speed steel roller network precipitates, the anti-stripping accident performance is poor is solved. Meanwhile, during metal solidification, pressure is loaded to incompletely or completely solidified metal, metal melt is solidified under the longitudinal pressure, and the solidified metal generates the forging and pressing effect. Compared with traditional static solidification, the density ofa cast and forged piece can be further improved, the problems that shrinkage cavities, loosening and the like are likely to happen to the roller sleeve are solved, and the hardness and abrasion resistance of the roller sleeve are improved. By means of the method, the hardness of the roller sleeve of a roller can reach 75-90 HRC, the density of the roller is improved by 3% or above compared with an ordinary production technology, the metal yield is improved by 15% or above, the service life of the single roller is prolonged by 20% or above, and the production cost is saved.

Description

technical field [0001] The invention relates to a production method of extrusion vibration casting of roll sleeves, belonging to the technical field of roll production. Background technique [0002] The roll is an indispensable key component and the most important consumable spare part in the production of the metallurgical industry. Its quality has an important impact on the production cost, processing efficiency and the quality of the rolled parts; Due to the influence of dynamic and static loads, wear and temperature changes during manufacturing, the rolls are required to have high strength, high toughness, high thermal fatigue resistance and anti-sticking steel; at present, a variety of materials for making rolls have been developed at home and abroad, and the commonly used materials are: Alloy ductile iron, bainite ductile iron, high chromium cast iron, high vanadium cast iron, high boron alloy, tool steel and other casting or forging integral rolls, and high alloy comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D18/02B22D27/08C22C38/34C22C38/32C22C38/28C22C38/24C22C38/22C22C38/04
Inventor 王宏明李桂荣吴江
Owner JIANGSU UNIV
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