To prevent rapid progress of wear in the case that a super-hard wear- resistant sheet is damaged and worn, by adhering through sequentially laminating the super-hard wear-resistant sheet composed of super-hard alloy, an insert sheet as stress relaxation material, and a hard wear-resistant sheet composed of iron and chrome as base material.

A wear-resistant liner 10 is constructed by sequentially laminating super-hard wear-resistant sheet 11 composed of tungsten-cobalt super-hard alloy, an insert sheet 12 composed of copper, a hard wear-resistant sheet 13 composed of high-chrome cast iron, and an iron sheet 14 composed of SS steel. The insert sheet 12 is composed of a copper sheet, where oxygen content of the copper material is, for example 5-10 ppm, and thickness is, for example 2 mm. By controlling oxygen density, generation of oxide is inhibited at the time of diffusion joining of the hard wear-resistant sheet 13 and the super-hard wear-resistant sheet 11 through the insert sheet 12 therebetween. Thereby, stress generated at the time of using between the both sheets are relaxed, and temperature distribution generated by temperature variation or the like becomes uniform.