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Heat treatment method for ultra-high-hardness nonferrous-metal cold roll

A heat treatment method and non-ferrous metal technology, applied in heat treatment furnaces, heat treatment equipment, furnace types, etc., to achieve full austenitization, increase the amount of retained austenite, and reduce the cost of use

Active Publication Date: 2014-09-10
YIXING YONGCHANG ROLL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a 3%Cr-containing material with a surface hardness of 102-105HSD, a hardness uniformity of ≤1HSD, and a hardened layer depth of more than 20mm in view of the current problem of the depth of the hardened layer of the 3% Cr roll. Heat treatment method for ultra-high hardness non-ferrous metal cold rolls

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] According to the chemical composition of the designed roll, the roll blank of the present invention is produced, and the blank is tested by ultrasonic to make it meet the relevant technical requirements. Finishing makes the diameter of the roll body ground to the set size before heat treatment can be performed. The process of heat treatment is as follows: a. First put the roll into the preheating furnace and preheat it at a temperature of 250 ° C, and the preheating time is not less than 12 hours; b. Install the preheated roll on the quenching machine for the roll The body is rotated and sprayed with water for quenching. The working parameters of the quenching machine tool are: quenching temperature is 900°C, quenching water temperature is 15-25°C, quenching water pressure is 0.25MPa, roll rotation speed is 35r / min and roll moving speed is 36mm / min, the roll needs to be cooled after quenching and the cold storage time is 60 minutes; c. After quenching, it is hoisted in...

Embodiment 2

[0025] According to the chemical composition of the designed roll, the roll blank of the present invention is produced, and the blank is tested by ultrasonic to make it meet the relevant technical requirements. Finishing makes the diameter of the roll body ground to the set size before heat treatment can be performed. The process of heat treatment is as follows: a. First put the roll into the preheating furnace and preheat it at a temperature of 230 ° C, and the preheating time is not less than 12 hours; b. Install the preheated roll on the quenching machine for the roll The body is rotated and sprayed with water for quenching. The working parameters of the quenching machine are: quenching temperature is 950°C, quenching water temperature is 15-25°C, quenching water pressure is 0.15MPa, roll rotation speed is 30r / min and roll moving speed is 42mm / min, the roll needs to be cooled after quenching and the cold storage time is 80 minutes; c. After quenching, it is hoisted into th...

Embodiment 3

[0027] According to the chemical composition of the designed roll, the roll blank of the present invention is produced, and the blank is tested by ultrasonic to make it meet the relevant technical requirements. Finishing makes the diameter of the roll body ground to the set size before heat treatment can be performed. The process of heat treatment is as follows: a. First put the roll into the preheating furnace and preheat it at a temperature of 220 ° C, and the preheating time is not less than 12 hours; b. Install the preheated roll on the quenching machine for the roll The body is rotated and sprayed with water for quenching. The working parameters of the quenching machine tool are: quenching temperature is 930°C, quenching water temperature is 15-25°C, quenching water pressure is 0.30MPa, roll rotation speed is 33r / min and roll moving speed is 30mm / min, the roll needs to be cooled after quenching and the cold storage time is 45 minutes; c. After quenching, it is hoisted in...

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Abstract

The invention discloses a heat treatment method for a ultra-high-hardness nonferrous-metal cold roll. The heat treatment method comprises the following steps: a, firstly putting the roll in a preheating furnace for preheating at a temperature of 220-250 DEG C; b, installing the roll on a quenching machine tool to performing rotation water-spraying quenching on the roll body, wherein the working parameters of the quenching machine tool comprise the quenching temperature of 900-950 DEG C, the quenching water temperature of 15-25 DEG C and the quenching water pressure of 0.15-0.30 MPa; c, after quenching, performing ultralow-temperature deep cryogenic treatment at -120 DEG C to -180 DEG C; d, after deep cryogenic treatment is finished, hanging the roll and sending to a heating furnace to quench at 100-120 DEG C, and controlling the quenching time to not less than 72 h; and e, performing hardness detection on the surface of the roll body subjected to quenching, so as to prepare the needed ultra-high-hardness nonferrous-metal cold roll is the surface hardness is qualified. The surface hardness of the prepared roll reaches 102-105 HSD, the hardness uniformity is 1 HSD or less, and the depth of a hardening layer reaches 20 mm or more.

Description

technical field [0001] The invention relates to a heat treatment process technology for ultra-high hardness cold rolls, especially for cold rolls used in the aluminum foil rolling industry, specifically a method for making the surface hardness reach 102-105HSD, the hardness uniformity ≤ 1HSD and the hardened layer A heat treatment method for ultra-high hardness non-ferrous metal cold rolling rolls containing 3% Cr materials with a depth of more than 20 mm. Background technique [0002] Because of its excellent characteristics, aluminum foil is widely used in food and beverage, automobile industry, medicine, electronics industry and daily necessities. With the improvement of living standards, people's demand for aluminum foil will continue to grow, showing its broad application prospects, and the aluminum foil industry will also face a period of rapid development. Rolling aluminum foil has extremely high requirements on the performance of the roll itself (especially surface ...

Claims

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Application Information

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IPC IPC(8): C21D9/38C21D6/04C22C38/46
Inventor 邵黎军陈彬曹旭杨国平蒋云峰
Owner YIXING YONGCHANG ROLL
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