초록 ▼

An aluminum alloy for forging comprising from 2.0 to 3.3% by weight of Si, from 0.2 to 0.6% by weight of Mg, from 0.01 to 0.1% by weight of Ti, from 0.0001 to 0.01% by weight of B, up to 0.15% by weight of Fe, one element or at least two elements selected from the group consisting of 0.001 to 0.01%

An aluminum alloy for forging comprising from 2.0 to 3.3% by weight of Si, from 0.2 to 0.6% by weight of Mg, from 0.01 to 0.1% by weight of Ti, from 0.0001 to 0.01% by weight of B, up to 0.15% by weight of Fe, one element or at least two elements selected from the group consisting of 0.001 to 0.01% by weight of Na, 0.001 to 0.05% by weight of Sr, 0.05 to 0.15% by weight of Sb and 0.0005 to 0.01% by weight of Ca, up to 0.001% by weight of P, the P/Ca weight ratio being up to 1.0, and the remainder Al, eutectic Si contained in the cast structure of said aluminum alloy having an average particle size of up to 20 m

대표청구항 ▼

A process for producing an aluminum alloy for forging, comprising the steps of: casting an aluminum alloy which consists essentially of comprises from 2.0 to 3.3% by weight of Si, from 0.2 to 0.6% by weight of Mg, from 0.01 to 0.01 by weight of Ti, from 0.0001 to 0.01% by weight of B, up to 0.15% by

A process for producing an aluminum alloy for forging, comprising the steps of: casting an aluminum alloy which consists essentially of comprises from 2.0 to 3.3% by weight of Si, from 0.2 to 0.6% by weight of Mg, from 0.01 to 0.01 by weight of Ti, from 0.0001 to 0.01% by weight of B, up to 0.15% by weight of Fe, at least one element selected from the group consisting of 0.001 to 0.01% by weight of Na, 0.001 to 0.05% by weight of Sr, 0.05 to 0.15% by weight of Sb and 0.0005 to 0.01% by weight of Ca, at least one element selected from the group consisting of 0.2 to 0.5% by weight of Cu, 0.01 to 0.2% by weight of Zr, 0.02 to 0.5% by weight of Mn and 0.01 to 0.3% by weight of Cr, up to 0.001% by weight of P, the P/Ca weight ratio being up to 1.0, and the remainder Al, by solidifying a melt of said aluminum alloy at a cooling rate of at least 0.5°C./sec to form an ingot of said aluminum alloy having a dendrite arm spacing of up to 60 m500°to 550°C. for 1 to 24 hours under a condition that the heating rate of said ingot is up to 50°C./hour in a temperature range of at least 450°C.; forging, after said homogenizing, said ingot to form a forging; heating said forging in a temperature range of 540°to 550°C. for 0.5 to 2 hours; water quenching said forging after said heating; and tempering, within 6 hours after said water quenching, said forging by heating in a temperature range of 140°to 180°C. for 2 to 20 hours.