ALLOY WITH A LOW SPECIFIC GRAVITY, AND A MANUFACTURING METHOD THEREOF WITHOUT ADDING LARGE AMOUNT OF MANGANESE

摘要

PURPOSE: An alloy with a low specific gravity, and a manufacturing method thereof are provided to improve product commercialization by using Al with better castability than Mn.;CONSTITUTION: An alloy with a low specific gravity is composed of Fe as a main component, 0.2-0.5wt% of C, 5-10wt% of Mn, 10-15wt% of Al, 3wt% or less of Si, 3wt% or less of Cr, 0.1-2wt% of Ni, 0.005wt% or less of B, and other inevitable impurities. A structure of the alloy is ferrite combined with austenite, or ferrite.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Hot rolling(FRT: 950°C); (BB) Recrystalization(700-900°C, 5min-1hr); (CC) Multi-stage cold rolling;