A method of preparing a monocrystal anisotropic oxide on alloy medical apparatus, which adds an iron-chromium alloy material into minimally invasive surgical blade, is disclosed by the present invention. Due to the characteristic of alloy material, a stainless steel formed of iron-chromium ally contains grain texture tissue. The method includes: growing polycrystal oxide through a high-temperature oxidation reducing the grain texture tissue and oxide through an electro-polishing oxidation-reduction reaction for 3 to 18 minutes, so as to reveal the grain texture tissue and control the growing orientation of the oxide and growing a monocrystal anisotropic chromium oxide. As discovered by researches, monocrystal anisotropic oxide increases the physical character, chemical character, corrosion-proofness, and biological character of the polycrystal iron-chomium alloy stainless steel material.本發明提供一種開發單晶異向性氧化物在合金醫療器材上之製備方法,其將鐵鉻合金材導入微創外科手術刀具,製備方法包含以下步驟:鐵鉻合金不銹鋼材因合金導致含有晶粒紋理組織,首先經由高溫氧化後成長多晶的氧化物,隨後透過電解拋光有電化學氧化還原反應,其反應時間為3分鐘至18分鐘,消減多晶的晶粒組織及氧化物後使晶粒紋理組織顯露出來,並控制氧化物成長方向,成長出優選方向的單晶異向性氧化鉻。經由研究發現,具有單晶異向性氧化物之多晶鐵鉻合金不銹鋼材具有增強物理性質、化學性質、抗腐蝕性及生物特性的作用。無
