铝及铝合金反向挤压(1)

介绍了金属反向挤压法的基本原理、特点、主要分类、生产中应注意的技术、质量问题和主要经济指标。介绍了国内50MN反向挤压机挤压生产工艺，反向挤压时金属流动特性，制品的组织、性能及尺寸精度，现代反向挤压设备的主要特点（如铸锭表面切屑加工、铸锭梯度加热与排气、穿孔针拉力显示与保护、过程信息与控制系统、挤压机中心精度控制技术等），铝及铝合金管、棒、型材的反向挤压生产工艺。

Indirect extrusion of aluminum and aluminum alloy( 1 )

This thesis introduces the cardinal principal,characteristics,major classfication of indirect extrusion of metal,as well as technique problems,quality problems,chief technical and economic index that should be noticed in the production of indirect extrusion.It also presents the productive technology of the domestic 50 MN indirect extruder,flow behavior of metal in the indirect extrusion,organization,performance and dimensional accuracy of the production,main characteristics of modern indirect extruding equipment(e.g.chip process on ingot surface,gradient heating and air-exhausting for cast ingot,tension display and protection of the pecker,processing information and control system,control technique of extruder's central accuracy,etc.),and productive technology of indirect extrusion on tube,bar and section bar of aluminum and aluminum alloy.