Sintering and mechanical properties of FeCoCu fetal body applied for diamond tools
Sintering and mechanical properties of FeCoCu fetal body applied for diamond tools
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发表时间：
2010
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通讯作者：
Jiang Jian-feng
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作者：
Jiang Jian-feng
采用真空热压烧结法制备了FeCoCu、A和B 3种合金胎体，研究了烧结温度对FeCoCu合金胎体的断口形貌、抗弯强度、硬度和相对密度的影响，并进行了对比。对不同烧结温度下的A、B胎体进行了力学性能测试，结果表明，所有FeCoCu胎体试样的断口形貌均为沿晶断裂和穿晶断裂骨折;随着烧结温度的升高，FeCoCu胎体的晶粒尺寸增大，抗弯强度和相对密度先增大后减小，硬度降低，塑性提高，在750-850 ℃范围内，FeCoCu胎体的抗弯强度高于其它两种胎体;随着烧结温度的升高，FeCoCu，A和B胎体的硬度均降低，烧结温度对FeCoCu，A和B胎体硬度的影响趋势一致，当烧结温度低于750 ℃时，FeCoCu胎体的硬度高于其它几种，当烧结温度高于750 ℃时，FeCoCu胎体的硬度介于其它几种胎体之间，接近A胎体的硬度。
FeCoCu,A and B fetal bodies were prepared by hot-press sintering in vacuum.The effect of the sintering temperature on the fracture morphology,bending strength,hardness and relative density of FeCoCu fetal body was studied.For comparison,the mechanical properties of A and B fetal bodies sintered at different temperatures were tested.The results show that the fracture morphology of all FeCoCu fetal body samples exhibits intergranular fracture and transgranular fracture;with the increase of sintering temperature,the grain size of the FeCoCu fetal body increases,the bending strength and relative density first increase and then decrease,the hardness decreases and plasticity enhances;when the sintering temperature is in the range of 750-850 ℃,the bending strength of FeCoCu fetal body is higher than that of other two fetal bodies;with the increase of the sintering temperature,the hardness of FeCoCu,A and B fetal bodies decreases.The change trend of the hardness on the sintering temperature of FeCoCu,A and B fetal bodies is uniform.When the sintering temperature is lower than 750 ℃,the hardness of FeCoCu fetal body is higher than that of others.When the sintering temperature is higher than 750 ℃,the hardness of FeCoCu fetal body is between that of the others and close to that of A fetal body.