Iron-based superconductors have become a promising candidate for high-field applications due to their high transition temperature, ultra-high upper critical field, and low anisotropy. For practical applications, it is important to improve the transport J _c and lower the cost of superconductors. In this paper, with groove rolling and hot isostatic pressing (HIP) process, the transport J _c of the Cu/Ag composite sheathed (Ba, K)Fe₂As₂ powder-in-tube round wires was increased to 4.7 10⁴ A cm⁻² at 10 T and 4.2 K. The utilization of HIP and groove rolling process improved the mass density of the wire. Moreover, a certain axial texture was introduced through groove rolling. It is suggested that the combination of groove rolling and HIP processes are of great help to improve the microstructure of the wires, thereby obtaining a higher transport J _c.

铁基超导体由于其高转变温度、超高上临界场和低各向异性，已成为高场应用的有希望的候选者。对于实际应用，重要的是提高传输J _c并降低超导体的成本。本文采用滚槽和热等静压(HIP)工艺，将Cu/Ag复合护套(Ba,K)Fe ₂ As ₂管内粉末圆线的输运J _c提高到4.7 10 ⁴ A厘米^-2在 10 T 和 4.2 K。HIP 和槽滚轧工艺的利用提高了线材的质量密度。此外，通过沟槽滚压引入了一定的轴向织构。建议滚槽和HIP工艺的结合对改善线材的微观结构有很大帮助，从而获得更高的传输J _c。