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摘要：
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采用外观和金相方法,对止血钳和手术剪锻坯出现的型腔填充不满、裂纹、重皮和切边撕裂等缺陷进行分析。结果表明:锻坯缺陷是由钢材低温流动性差和锻坯未进行锻后高温回火处理引起,提高锻造温度,增加钢的流动性,可避免或减少型腔填充不满、开裂和重皮缺陷,锻后高温回火可避免切边撕裂,选用合适的模具材料降低锻造应力可提高模具寿命。
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Forging defects of mould cavity non-saturate,crack,pucker and shearing edge avulsion,etc.on the astrictive clamps and operating scissors are studied by means of appearance and metallography.The results show that bad low-temperature flowing capability of steel and no tempering at high-temperature after forging cause the forging defects.Flowing capability of steel should be increased by means of increasing forging temperature to avoiding mould cavity non-saturate,crack and pucker.Shearing edge avulsion can be removed by means of tempering at high-temperature after forging.Selecting suitable mould material to reduce the forging stress can increase the mould service life.
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基金项目：
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作者简介：
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参考文献：
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[1]《理化检验》编辑部.金相检验[M].上海:机械工业部上海材料研究所,1983.
[2]王笑天.金属材料学[M].北京:机械工业出版社,1987.
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