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对六方螺母冷镦凹模进行了超塑成形与渗钒复合工艺的试验研究，结果表明：采取逐渐增速的超塑挤压成形工艺，可使模具型腔表面获得均匀一致的渗层厚度，渗层钒化物呈粒状组织，模具寿命较普通渗钒提高了２５％，模具成本明显降低。
The experimental research on superplastic forming and vanadizing of hexagonal cold heading die was carried out. The results show that the superplastic extrusion forming process with gradual increasing speed can make the surface of the die cavity get a uniform layer thickness, Penetrating layer of vanadium compounds were granular structure, die life than ordinary vanadium increased by 25%, significantly reducing the cost of the mold.