Made of the special materials, the rare-earth wear-resistant tubes are characterized by the quench hardening trend, hardening structure and cold cracking.

This paper introduces several kinds of wearing pipelines, and points out that the different wearing pipelines should be selected according to the difference of pumped conveying mediums and field conditions for prolonging the service life of the heavy-medium pipeline conveying system and reducing the maintenance load and materials consumption.

Based on the running conditions and failure manners of the wear resistant and heat resistant spareparts of the cement thermodynamic engineering equipments, the composition of it’s material Cr Ni N RE wear resistant and heat resistant steel was reasonably designed.