Aluminum foil mill working roll and manufacturing method thereof

Abstract

The invention discloses an aluminum foil mill working roll and a manufacturing method thereof. The chemical components of the aluminum foil mill working roll comprise, by weight, 0.90-0.95% of carbon,0.35-0.45% of silicon, 0.20-0.35% of manganese, 1.70-2.10% of chromium, 0.20-0.30% of molybdenum, 0.15-0.25% of nickel, 0.10-0.20% of vanadium, less than or equal to 0.015% of phosphorus, less than or equal to 0.015% of sulfur, and the balance iron and inevitable impurities. Through the aluminum foil mill working roll, on one hand, the alloy components containing 2% of a chromium material are optimized, and on the other hand, the corresponding heat treatment, cold treatment and machining processes are adopted in cooperation with the chromium material; finally, the aluminum foil mill working roll of which the diameter of a roll body is 200-300 mm, the length of the roll surface is 2000 mm or more, the coaxiality of the roll body and the roll neck is less than or equal to 0.002 mm, the surface hardness of the roll body is 100-105 HSD, the hardness uniformity is less than or equal to 2 HSD, the hardness of a hardening layer is greater than or equal to 12.5 mm and the scrap hardness is greater than or equal to 98 HSD can be obtained and meets the requirements for rolling double-zero aluminum foil.

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