Cast tube material

Abstract

The invention discloses a cast tube material. The cast tube material is prepared by the following components by mass: 156-407 parts of pig iron, 58-87 parts of steel, 5-15 parts of chromium, 14-38 parts of nickel, 5-12 parts of manganese, 7-15 parts of a ferrosilicon alloy, 6-13 parts of rhenium, 9-22 parts of an aluminum alloy, 4-9 parts of carbon, 5-10 parts of molybdenum, 7-14 parts of an inoculant and 4-10 parts of a nodulizer. The invention has the beneficial effects that the brittleness increasing tendency of the alloy in the service period is reduced, the physical performance of a casttube is improved in a solution strengthening mode, the service life is prolonged, and the product percent of pass is increased.

Description

technical field [0001] The invention relates to the technical field of precision casting, in particular to a cast pipe material. Background technique [0002] The essence of cast iron steel pipe is ductile iron pipe, because ductile iron pipe has the essence of iron and the performance of steel, so it is called this. Graphite in ductile iron pipes exists in spherical form, and the size of general graphite is 6-7 grades. In terms of quality, it is required that the spheroidization level of cast iron pipes should be controlled at 1-3 levels, and the spheroidization rate should be ≥ 80%. Therefore, the mechanical properties of the material itself have been better improved, and it has the essence of iron and the performance of steel. After annealing, the metallographic structure of the ductile iron pipe is ferrite plus a small amount of pearlite, and the mechanical properties are good, so it is also called cast iron pipe. It has the essence of iron, the performance of steel, e...

AI Technical Summary

Problems solved by technology

[0003] At present, due to the poor handling of the inoculation and spheroidization process in the cast pipe casting process, the metallogr