Process for controlling double-frequency quenching deformation of slender H13 straightening roll

A technology of straightening rollers and frequency quenching, which is applied in the field of dual-frequency quenching deformation control of slender H13 straightening rollers, which can solve the problems of poor jumping deformation of straightening rollers, inability to straighten, large deformation, etc., and reduce quenching stress , Reduce energy consumption, uniform heating effect

Pending Publication Date: 2021-12-31
MCC SFRE HEAVY IND EQUIP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the deep hardening layer, the straightening roller will inevitably have a certain run-out deformation after quenching, especially the slender and relatively large H13 straightening roller, which has a huge deformation after dual-frequency quenching according to the conventional process and cannot be straightened.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Process for controlling double-frequency quenching deformation of slender H13 straightening roll
  • Process for controlling double-frequency quenching deformation of slender H13 straightening roll
  • Process for controlling double-frequency quenching deformation of slender H13 straightening roll

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The product size of the H13 straightening roller used in this embodiment is: φ315X4450 / 5506. The hardness of the roll body is required to be HRC54-56, and the layer depth is 12-14mm. The main components of the product are shown in Table 1, and the basic parameters of the dual-frequency quenching transformer used are shown in Table 2;

[0025] Table 1H13 Main components of straightening rollers

[0026] C Si mn Cr Mo V 0.38 1.10 0.45 5.20 1.55 1.30

[0027] Table 2 Basic parameters of dual-frequency quenching transformer

[0028]

[0029] Adopt technology of the present invention to operate, as figure 1 As shown, the specific steps are as follows:

[0030] (1) Stress relief before quenching

[0031] Place the H13 straightening roller in a trolley-type resistance furnace, raise the temperature to 650°C at a rate of 80°C / h and keep it warm for 5-6h, and then cool the furnace to about 300°C for straightening after power failure, until t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a process for controlling double-frequency quenching deformation of a slender H13 straightening roll. The process specifically comprises the following steps: stress of the H13 straightening roll is relieved, straightening is carried out after relieving stress, and stress relieving and straightening are repeated until jumping deformation after relieving stress is less than or equal to 1mm; a proper quenching power frequency inductor and a proper intermediate frequency inductor are selected; the quenching temperature of the power frequency inductor and the intermediate frequency inductor is set, the H13 straightening roll descends at the speed of 42 mm / min in the quenching process, the H13 straightening roll does not rotate at the beginning of quenching, along with downward movement of a workpiece, when slight deformation of the H13 straightening roll is found, the H13 straightening roll is rotated to be located in the center of the power frequency inductor and the intermediate frequency inductor all the time, and the process is conducted all the time till quenching is completed. The four quenching links are subjected to process innovation, so that the double-frequency quenching deformation of the slender H13 straightening roll is greatly reduced, and the hardness uniformity of the roll surface is also improved.

Description

technical field [0001] The invention belongs to the technical field of heat treatment induction quenching of straightening rollers, and in particular relates to a process for controlling the double-frequency quenching deformation of elongated H13 straightening rollers. Background technique [0002] H13 straightening roll is a roll commonly used in hot-rolled strip leveling machines. Its surface requires high wear resistance and a certain depth of hardened layer. Therefore, generally this type of straightening roller needs to be induction hardened to achieve the required hardness and layer depth. For ordinary medium frequency induction hardening, the hardened layer depth is mostly around 6-8mm. To obtain a deeper hardened layer, you need Using dual-frequency quenching process, it can generally reach a hardened layer of 10-15mm. However, due to the deep hardening layer, the straightening roller will inevitably have a certain run-out deformation after quenching, especially the...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C21D1/10C21D1/18C21D6/00C21D9/38C21D11/00C22C38/02C22C38/04C22C38/22C22C38/24
CPCC21D1/18C21D1/10C21D9/38C21D11/00C21D6/002C21D6/005C21D6/008C22C38/02C22C38/04C22C38/22C22C38/24Y02P10/25
Inventor 李文彭元飞
Owner MCC SFRE HEAVY IND EQUIP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap