摘要
采用液相线铸造（在液相线温度铸造）和常规铸造的铝合金２６１８和７０７５，在２００ｋＮ材料试验机上采用具有不同模孔（直径１０，２０，３０ｍｍ）的一系列模具进行半固态模锻，以坯料充填高度作为衡量成形性能指标，考察不同变形温度（４９０～６００℃），不同锻压速度（ｖ＝０．１５～０．６ｍｍ／ｓ）和不同锻压力（ｐ＝５８～９７．２ｋＮ）对其半固态成形性的影响，结果表明，液相线铸造铝合金半固态成形性优于传统的固态成形，在液固相温度区间，随着温度的升高，成形性提高，并且在５８０～６００℃成形性均最好·
Aluminum alloy 2618 and 7075 prepared by liquidus casting (casting at the liquidus temperature) and conventional casting were mould forged in semi solid state between the liquidus and solidus temperature. The experiments were carried out on a 200kN mechanical test machine using the moulds with different holes diameters ( D 10, D 20,and D 30mm). The formability of the materials in the semi solid state were investigated at different deformation temperatures from 490℃ to 600℃,at different deformation rates (0 15～0.6mm/s) and different pressures (58～97 2kN). The height of filling was used to indicate the formability. The results show that the formability of liquidus casting aluminum alloy in semi solid state is better than conventional casting in solid state and the formability increases with increasing the temperature between the liquidus and solidus temperatures and the best formability can be obtained at the temperature between 580℃ and 600℃ for both liquidus casting 2618 and 7075.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
1999年第3期308-311,共4页
Journal of Northeastern University(Natural Science)
基金
辽宁省科委资助
关键词
铝合金
半固态
成形性
液相线铸造
aluminum alloy, semi solid state, formability, liquidus casting, reheating.
