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Minor-diameter cold roll hardening and tempering technology

A technology of cold rolling and small diameter, which is applied in the quenching and tempering process of small diameter cold rolling, which can solve the problems of long production cycle and large number of counts, and achieve the effect of clean quenching and tempering process and shortened production cycle

Active Publication Date: 2015-11-18
YIXING YONGCHANG ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For the quenching and tempering of batches of small diameter (≤Φ250) cold rolling rolls, the number of counts is large, and the quenching and tempering is carried out one by one, and the production cycle is long

Method used

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  • Minor-diameter cold roll hardening and tempering technology
  • Minor-diameter cold roll hardening and tempering technology

Examples

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Embodiment 1

[0025] Select a small-diameter cold roll for quenching and tempering treatment, such as Figure 1-2 As shown, the specific process is: (1) Carry out flaw detection on the roll blank 2; (2) Roughly process the qualified roll blank 2 according to the drawing; (3) Put the roll blank 2 into the furnace, and determine the bottom stacking five Support roll blanks 2, and then successively reduce and stack roll blanks 2 upwards layer by layer, and stack fourteen roll blanks 2 in total. The roll blanks 2 are separated by brackets 1 and the distance between the roll blanks 2 is guaranteed to be 10mm; (4) Carry out heat treatment on the roll billet. In stage one, the temperature is raised to 350°C for preheating and heat preservation for 2 hours. In stage two, the temperature is raised to 650°C for heat treatment and heat preservation for 2 hours. In stage three, the temperature is raised to 900°C for heat treatment and heat preservation for 1 hour. The description is: the heating rate i...

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Abstract

The invention discloses a minor-diameter cold roll hardening and tempering technology, which comprises the steps: (1) roll blanks are subjected to flaw detection ; (2) the roll blanks are fed into a furnace; (3) the roller blanks are subjected to heat treatment, in a phase I, the temperature is risen to 320-350 DEG C, preheating is carried out, and thermal insulation is carried out for 1-2h; in a phase II, the temperature is risen to 640-670 DEG C, heat treatment is carried out, and thermal insulation is carried out for 2-3h; and in a phase III, the temperature is risen to 860-930 DEG C, heat treatment is carried out, and thermal insulation is carried out for 1-2h; (4) after heat treatment, the roll blanks are integrally hoisted out of the resistance furnace, and are placed into a cooling tank for cooling for 7-9 min; (5) after cooling ends, the roll blanks are hoisted out of the cooling tank, and are subjected to air cooling for 10-15 min; (6) the roll blanks are hoisted into the resistance furnace, and a tempering working procedure is carried out; and (7) after tempering ends, detection is carried out, namely, the hardening and tempering technology is completed. According to the hardening and tempering technology, the production period is shortened when minor-diameter cold rolls are produced in batches, and the whole hardening and tempering process is clean and pollution-free.

Description

technical field [0001] The invention relates to a production method of rolls, in particular to a quenching and tempering process for small-diameter cold rolls which can be tempered in batches. Background technique [0002] For quenching and tempering batches of small-diameter (≤Φ250) cold rolling rolls, there are many counts, and the quenching and tempering is carried out one by one, and the production cycle is long. Contents of the invention [0003] The object of the present invention is to provide a quenching and tempering process for small-diameter cold rolls that can be tempered in batches in order to solve the problems in the prior art. [0004] The purpose of the present invention is solved by the following technical solutions: [0005] A tempering process for small-diameter cold rolls, characterized in that: the steps of the tempering process are: [0006] (1) Carry out flaw detection on the roll blank; [0007] (2) Roughly process qualified roll blanks accordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D1/25C21D9/38
Inventor 曹旭朱明俊
Owner YIXING YONGCHANG ROLL
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