Bi-metal composite abrasion-resistant pipe and preparation method thereof

Abstract

The invention discloses a bi-metal composite abrasion-resistant pipe. The bi-metal composite abrasion-resistant pipe comprises a liner pipe, an outer sleeve and an anticorrosion coating. The liner pipe is made of a titanium alloy material. The outer sleeve comprises, by mass, 0.1%-0.2% of manganese, 0.3%-0.6% of chrome, 0.4%-0.8% of calcium, 0.02%-0.25% of silicon, 0.1%-0.5% of magnesium, 0.08%-0.24% of molybdenum, 0.1%-0.4% of niobium, 0.6%-1.2% of zinc, 1%-2% of carbon, 8%-14% of aluminum, 0.2%-0.6% of tin, and the balance ferrum and unavoidable trace impurities. According to the bi-metal composite abrasion-resistant pipe disclosed by the invention, the outer sleeve and the liner pipe are in close fit, the inner and outer layers cannot be separated easily, and outer layer metal provides a supporting effect on inner layer metal; using safety is improved, and service life is prolonged; impact resistance and abrasion resistance are good, and an anticorrosion function and a lubrication function are achieved; and in the pulling process, the lubrication function can effectively prevent the pipe from being strained under the working condition of large material deformation.

Description

Technical field [0001] The invention relates to the field of metal casting molding, in particular to a bimetal composite wear-resistant pipe and a preparation method thereof. Background technique [0002] The bimetal composite pipe has high carbon content, impact resistance, low thermal expansion rate, pressure resistance, high temperature resistance, mature installation and complete specifications. The bimetallic composite pipes produced by many manufacturers are widely used in industrial fields such as oil field, chemical industry, electric power and so on. Their scope of application is becoming wider and wider, and the economic, environmental and social benefits brought by them are more obvious. Commercially available bimetal composite pipes use the mechanical properties of two different materials, that is, the elastic deformation range of the outer base pipe and the low yield strength of the inner liner pipe. Under the squeeze of the screw feed of the rolling machine, the in...

AI Technical Summary

Problems solved by technology

[0003] Despite the rapid development of metallurgical and financial casting technology in recent years, large-scale production applications are still limited

The ceramic composite steel pipe developed in recent years has good wear resistance, but the product price is high, the production process is complicated, and the wear resistance of the weld joint is not good, which limits its promotion; the high chromium cast iron / steel composite pipe has high hardness and strong corrosion resistance , good wear resistance, but poor toughness, easy to crack, not conducive to welding and pipe erection