锻压技术

挤压工艺参数对挤压态新型铝合金建筑型材性能的影响

英文标题：Influence of extrusion process parameters on properties of extruded architectural profiles for new aluminum alloy

作者：王莹郝雨胡申成

分类号：TG146.21

出版年,卷(期):页码：2018,43(4):154-158

摘要：

为了研究挤压工艺参数对Al-Mg-Si-Cu-Cr-Sr新型铝合金建筑型材性能的影响，采用不同的挤压温度、挤压速度和挤压比，进行了该新型铝合金型材的挤压成形，并进行了拉伸性能和耐腐蚀性能的测试与分析。结果表明：随挤压温度从430 ℃提高至550 ℃，挤压速度从1 m·min-1增大至5 m·min-1，挤压比从10增加至26，型材的抗拉强度先增大后减小，耐腐蚀性能先提升后下降。与430 ℃挤压相比，490 ℃挤压时型材的抗拉强度增大39 MPa、腐蚀电位正移0.127 V；与1 m·min-1挤压速度相比，3 m·min-1挤压时型材的抗拉强度增大27 MPa、腐蚀电位正移0.097 V；与挤压比26相比，挤压比18时型材的抗拉强度增大22 MPa、腐蚀电位正移0.109 V。Al-Mg-Si-Cu-Cr-Sr新型铝合金建筑型材的挤压工艺参数优选为：挤压温度490 ℃、挤压速度3 m·min-1和挤压比18。

In order to study the influence of extrusion process parameters on properties of architectural profiles for new aluminum alloy Al-Mg-Si-Cu-Cr-Sr, the new aluminum alloy profiles were extruded by taking various extrusion temperatures, extrusion speeds and extrusion ratios, and the tensile properties and corrosion resistance properties of profiles were tested and analyzed. The results show that both tensile strength and corrosion resistance property of profiles first increase and then decrease with the increasing of extrusion temperature from 430 ℃ to 550 ℃, extrusion speed from 1 m·min-1 to 5 m·min-1 and extrusion ratio from 10 to 26. Compared with the extrusion temperature of 430 ℃, when the extrusion temperature is 490 ℃, the tensile strength of profiles increases by 39 MPa, and the corrosion potential shifts positively by 0.127 V. However, compared with the extrusion speed of 1 m·min-1, when the extrusion speed is 3 m·min-1, the tensile strength of profiles increases by 27 MPa, and the corrosion potential shifts positively by 0.097 V. Furthermore, compared with the extrusion ratio of 26, when the extrusion ratio is 18, the tensile strength of profiles increases by 22 MPa, and the corrosion potential shifts positively by 0.109 V. Finally, the optimal extrusion process parameters of architectural profiles for new aluminum alloy Al-Mg-Si-Cu-Cr-Sr are as follows: the extrusion temperature is 490 ℃, the extrusion speed is 3 m·min-1 and the extrusion ratio is 18.

基金项目：

王莹（1965-），女，硕士，副教授；E-mail：ccwy121@sina.com

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