(北京有色金属研究总院 有色金属材料制备加工国家重点实验室,
北京 100088)
摘 要: 采用喷射成形技术制备了70Si30Al合金， 研究了在喷射成形工艺过程中雾化气体压力与金属熔体质量流率比值(p/m)对沉积坯件的影响。 结果表明： p/m比值对沉积坯件的实收率、 初生硅尺寸、 致密度有显著影响。 随着p/m比值增大， 沉积坯件实收率、 初生硅相平均尺寸、 致密度均减小； 综合考虑p/m比值对实收率、 初生硅尺寸、 致密度的影响， 分析认为， 在喷射成形工艺过程中最佳的p/m比值应在0.209～0.231 MPa/(kg·min-1)之间。
关键字: 70Si30Al合金；喷射成形；雾化气体压力；金属熔体质量流率
（ State Key Laboratory for Fabrication and Processing of Nonferrous Metals, General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract: The effect of ratio of the atomization pressure to the melt mass flux rate(p/m) on the preforms of spray formed 70Si30Al alloy was studied. The results indicate that ratio of the atomization pressure to the melt mass flux rate has considerate influence on the yield of the preforms, dimension of the primary silicon phases and the relative density, which decrease with ratio of p/m increasing. Effect of p/m ratio on the yield of the preforms, dimension of the primary silicon phases and the relative density is comprehensively considered, then the optimal ratio of p/m is 0.209-0.231 MPa/(kg·min-1).
Key words: 70Si30Al alloy; spray forming; atomization pressure; melt mass flux rate
