中国有色金属学报（英文版）
中國有色金屬學報（英文版）
중국유색금속학보（영문판）
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
2012年
6期
1313-1321
,共9页
螺旋齿轮%粉末挤压%气雾化Zn-22％Al粉%超塑性
螺鏇齒輪%粉末擠壓%氣霧化Zn-22％Al粉%超塑性
라선치륜%분말제압%기무화Zn-22％Al분%초소성
helical gear%powder extrusion%gas atomized Zn-22％Al powder%superplasticity
基于Zn-22％Al共析合金的超塑性,采用粉末挤压工艺制造微型螺旋齿轮,以减小成形压力和获得细小的显微组织.该螺旋齿轮的规格为:模数0.3,齿数1.2,螺旋角15°.将粉末压制坯通过烧结和固溶热处理进行致密化.致密化的坯料由层状和细晶状组织组成.在温度250°C,应变速率2.36×i0-3和1.18×10-1s-1的条件下对坯料进行挤压,并对挤压成形的螺旋齿轮的力学性能进行测试.
基于Zn-22％Al共析閤金的超塑性,採用粉末擠壓工藝製造微型螺鏇齒輪,以減小成形壓力和穫得細小的顯微組織.該螺鏇齒輪的規格為:模數0.3,齒數1.2,螺鏇角15°.將粉末壓製坯通過燒結和固溶熱處理進行緻密化.緻密化的坯料由層狀和細晶狀組織組成.在溫度250°C,應變速率2.36×i0-3和1.18×10-1s-1的條件下對坯料進行擠壓,併對擠壓成形的螺鏇齒輪的力學性能進行測試.
기우Zn-22％Al공석합금적초소성,채용분말제압공예제조미형라선치륜,이감소성형압력화획득세소적현미조직.해라선치륜적규격위:모수0.3,치수1.2,라선각15°.장분말압제배통과소결화고용열처리진행치밀화.치밀화적배료유층상화세정상조직조성.재온도250°C,응변속솔2.36×i0-3화1.18×10-1s-1적조건하대배료진행제압,병대제압성형적라선치륜적역학성능진행측시.
Powder extrusion,which is based on the superplastic behavior of Zn-22％A1 eutectoid alloy,was proposed to reduce the forming load and promises to provide fine microstructures in the manufacture of miniature helical gears.The specifications of the helical gears were as follows:module,0.3; number of teeth,12; and helix angle,15°.Compacted powders were consolidated by sintering and solution heat treatment.The consolidated billets consisted of lamellar and fine-grained microstructures.Extrusion experiments were carried out under the following conditions:temperature,250 °C; strain rates,2.36× 10ˉ3 sˉ1 and 1.18× 10-1 s- 1.The mechanical properties of the extruded helical gears were investigated by measurement of the Vickers hardness and extrusion load,and by scanning electron microscopy.
