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发明授权
CN107523719B 一种新型高硬度镍钛基合金 有权

一种新型高硬度镍钛基合金
摘要：
本发明公开了一类具有高硬度、低弹模、耐摩擦磨损、低密度、无磁性、耐腐蚀的富镍的镍钛基合金。通过在富镍的Ni‑Ti二元合金体系基础上，加入取代Ni‑Ti合金中Ti位的Al、Nb、Hf、Ta、Zr、Mo、Co元素(X组元素)或其组合。或者在富镍的Ni‑Ti二元合金体系基础上加入取代Ni‑Ti合金中Ni位的Cu、Fe、Cr、Mo、Co元素(Y组元素)或其组合。或者在富镍的Ni‑Ti二元合金体系基础上同时加入取代Ni‑Ti合金中Ti位和Ni位的上述合金元素及其组合。该合金的主要强化相位纳米Ni4Ti3相，体积分数为30～80Vol％，合金硬度不低于600HV。
摘要（英）：

The invention discloses a nickel-rich nickel-titanium-based alloy high in hardness, low in elastic modulus, resistant to frictional wear, low in density, nonmagnetic and resistant to corrosion. On the basis of a nickel-rich Ni-Ti binary alloy system, elements of Al, Nb, Hf, Ta, Zr, Mo and Co (X group elements) or combinations of the elements of Al, Nb, Hf, Ta, Zr, Mo and Co (X group elements) replacing Ti positions in the Ni-Ti alloy are added. Or on the basis of the nickel-rich Ni-Ti binary alloy system, elements of Cu, Fe, Cr, Mo and Co (Y group elements) or combinations of the elements of Cu, Fe, Cr, Mo and Co (Y group elements) replacing Ni positions in the Ni-Ti alloy are added. Or on the basis of the nickel-rich Ni-Ti binary alloy system, the above alloy elements or the combinations of the alloy elements replacing the Ti positions and the Ni positions in the Ni-Ti alloy are added at the same time. Main strengthened phases of the alloy are nanometer Ni4Ti3 phases, the volume fraction is 30-80 Vol%, and the alloy hardness is not lower than 600 HV.

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