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法国最近研制成一种含钴的耐热铸铝合金,牌号为AFNOR NF A57-702,代号为A1-Cu5NiCo。其化学成份如下:Cu 4.50～5.50％其中规定:Ni 1.30～1.80％ Ti+Zr=0.50％Mn 0.2～0.30％ Sb+Co=O.60％Ti 0.15～0.25％最大杂质含量:Co 0.10～0.40％ Fe 0.5％,Si 0.3％,Sb 0.10～0.4％ Mg 0.05％,Zn 0.05％,Zr 0.10～0.3％ Pb 0.05％,Sn 0.05％用该合金制成的铸件,使用温度高至250℃时,机械性能几乎不变,超过250℃时略有下降,它特别适用于200～300℃的场合,如煤气灶上的燃烧头子。这种合金应进行热处理,先加热至535±3℃,保
France recently developed a heat-resistant cast aluminum alloy containing cobalt, grade AFNOR NF A57-702, code-named A1-Cu5NiCo. Its chemical composition is as follows: Cu 4.50-5.50% of which stipulated: Ni 1.30 ~ 1.80% Ti + Zr = 0.50% Mn 0.2 ~ 0.30% Sb + Co = O.60% Ti 0.15 ~ 0.25% Maximum impurity content: Co 0.10 ~ 0.40 % Fe 0.5%, Si 0.3%, Sb 0.10-0.4% Mg 0.05%, Zn 0.05%, Zr 0.10-0.3% Pb 0.05%, Sn 0.05% Castings made from this alloy at service temperatures up to 250 ° C, Mechanical performance is almost unchanged, a slight decline over 250 ℃, it is particularly suitable for 200 ~ 300 ℃ occasions, such as the combustion head on a gas stove. This alloy should be heat treatment, first heated to 535 ± 3 ℃, Paul