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本文用光学显微镜、电阻、硬度测量等方法研究了AgMg_(0.12),AgMg_(0.24),AgMg_(0.47)合金丝材在2—8kg/cm~2氧压下,500——800℃范围内的氧化动力学、组织和性能,研究结果表明:内氧化深度的平方与氧压力的平方根成正比;与Mg含量成反比;内氧化深度平方的对数与绝对温度的倒数成线性关系。丝材的氧化区面积与氧化时间成抛物线关系,电阻率随氧化温度的增加而降低,电阻率及显微硬度不随氧压力变化。上述结果还表明,提高内氧化速度可以改善合金的性能。
The mechanical properties of AgMg_ (0.12), AgMg_ (0.24) and AgMg_ (0.47) alloy wires were studied under light pressure of 2-8kg / cm ~ 2 and 500-800 ℃ by means of optical microscope, electrical resistance and hardness measurement. The results show that the square of the depth of internal oxidation is proportional to the square root of oxygen pressure, inversely proportional to the content of Mg, and the logarithm of the depth of inner oxidation is linear with the reciprocal of absolute temperature. The oxide area of the wire has a parabolic relationship with the oxidation time, the resistivity decreases with the increase of the oxidation temperature, and the resistivity and microhardness do not change with the oxygen pressure. The above results also show that increasing the rate of internal oxidation can improve the performance of the alloy.