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金属与合金的超塑性效应是提高金属加工工艺效果的重要因素。在体积模锻、板材冲压成形和其它特种成形工艺过程中利用超塑性工艺。因可减少或取消机加工余量,相应的减少了金属的加工体积和劳动量,为此可以提高材料的利用系数和非加工表面系数,降低了能源消耗和成形力,并提高了产品质量。然而,在金属或合金变形时实施超塑性状态,使金属加工工艺大为复杂并提高下成本。首先必须使原始毛坯具备超细晶粒组织。其次,由于必须规定超塑性变形时的温度一速
The superplastic effect of metals and alloys is an important factor to improve the effect of metal processing. In the volume of forging, sheet metal stamping and other special forming process using superplasticity process. Because can reduce or cancel the machining allowance, correspondingly reduce the metal processing volume and labor, which can improve material utilization factor and non-processing surface coefficient, reduce energy consumption and forming force, and improve product quality. However, the implementation of superplasticity in the deformation of metals or alloys complicates the metalworking process and increases the cost. First of all, the original blank must be provided with ultra-fine grain structure. Second, because of the need to prescribe the speed of superplastic deformation temperature