Aluminum foil mill work roll and manufacturing method thereof

Abstract

The invention discloses a working roll of an aluminum foil rolling mill and a manufacturing method thereof. The chemical composition and weight percentage of the working roll of an aluminum foil rolling mill are as follows: carbon 0.90-0.95%, silicon 0.35-0.45%, manganese 0.20-0.35%, chromium 1.70-2.10 %, Molybdenum 0.20~0.30%, Nickel 0.15~0.25%, Vanadium 0.10~0.20%, Phosphorus ≤0.015%, Sulfur ≤0.015%, and the rest are iron and unavoidable impurities. On the one hand, the present invention optimizes the alloy composition of the traditional 2% Cr material, and on the other hand, cooperates with the corresponding heat treatment, cold treatment and machining process for this material, and finally can obtain a roll body diameter between 200-300mm and a roll surface length of 2000mm Above, roll neck coaxiality ≤ 0.002mm, roll body surface hardness 100-105HSD, hardness uniformity ≤ 2HSD, hardened layer depth ≥ 12.5mm, scrapping aluminum foil mill work rolls with hardness ≥ 98HSD, meeting the rolling double Zero aluminum foil required.

Description

technical field [0001] The invention belongs to the technical field of aluminum foil rolling mills, and in particular relates to a working roll of an aluminum foil rolling mill and a manufacturing method thereof. Background technique [0002] Aluminum foil refers to the aluminum material with a thickness of ≤0.2mm after cold rolling. According to the thickness, aluminum foil can be divided into thick aluminum foil (0.1mm≤thickness≤0.2mm), single zero aluminum foil (0.01mm≤thickness<0.1mm) and double Zero aluminum foil (0.005≤thickness<0.01mm). The so-called "single zero aluminum foil" refers to the aluminum foil with "one zero" after the decimal point when mm is the thickness measurement unit; the so-called "double zero aluminum foil" refers to the "two zeros" after the decimal point when mm is the thickness measurement unit Zero" aluminum foil. [0003] Due to its excellent characteristics, aluminum foil is widely used as packaging materials for food, beverages, cig...

AI Technical Summary

Problems solved by technology

[0007] The work rolls made of 3%Cr (and above) have high alloy content, which leads to high production cost of the blank, especially the high alloy content will also make it more difficult to control segregation during the smelting and forging process of the roll blank, especially for this If the length of the roll surface is required to be more than 2000mm, it is more difficult to ensure the uniformity of the hardness of the roll body

[0008] The traditional 2%Cr roll blank is less difficult to smelt and forge, and the roll surface structure uniformity is better. However, due to the shallow depth of the hardened layer, low surface hardness of the roll body, and rapid hardness drop, it is rarely used to prepare rolled double-rollers at present. Foil-free work rolls