日本钢管公司通过改进复合管坯的构成和轧管工艺,在曼内斯曼轧管机上生产出了中小口径的高耐蚀性无缝复合钢管。为了提高在压延过程中内外管边界面上的抗剪强度,该公司采取了利用内外坯热膨胀差的热扩散接合法,有效地提高了内外坯之间的接合强度,从而制成了 Japanese steel pipe company by improving the composition of the composite tube and rolling process, in the Mannesmann rolling mill to produce a small diameter of the high corrosion resistance seamless composite steel pipe. In order to improve the shearing strength of the inner and outer pipe boundary surfaces during the rolling process, the company adopted a thermal diffusion bonding method that utilizes the difference in thermal expansion between the inner and outer billets, effectively increasing the bonding strength between the inner and outer billets,