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日本钢管公司研制成功两种新的钛合金:超塑性成形的SP-700和冷成形的CF-800。两种钛合金的突出特点是具有良好的可加工性。 Ti-6AI-4V合金只有在大约900℃的温度时才达到超塑往。因此所用模具价格昂贵和寿命较短。新研制的两种钛合金通过添加数量非常少的几种其它元素而解决了上述问题。例如,SP-700合金在775℃时就呈现超塑性。其延伸率可达2000%,室温强度比Ti-6AI-4V合
Japanese tube company successfully developed two new titanium alloys: superplastic forming SP-700 and cold forming CF-800. The outstanding feature of both titanium alloys is their good machinability. Ti-6AI-4V alloy reaches its superplastic temperature only at about 900 ℃. Therefore, the mold used is expensive and short life expectancy. The newly developed two titanium alloys solve the above problems by adding a few other elements in very small quantities. For example, SP-700 alloys exhibit superplasticity at 775 ° C. Its elongation up to 2000%, room temperature strength than Ti-6AI-4V together