Low-carbon nickel-chromium-molybdenum-niobium alloy stainless-steel seamless pipe

Abstract

The invention discloses a low-carbon nickel-chromium-molybdenum-niobium alloy stainless-steel seamless pipe. The stainless-steel seamless pipe contains the following ingredients in percentage by weight: 58% of nickel, 20%-23% of chromium, 8%-10% of molybdenum, 3.15%-4.15% of niobium, 5% of iron, 0.4 of aluminum, 0.4 of titanium, 0.1% of carbon, 0.5% of manganese, 0.5% of silicon, 1% of cobalt, 0.015% of phosphorus and 0.015% of sulfur. The stainless-steel seamless pipe is produced by the steps of: (1) drilling a hole in the center of a blank and inspecting the blank; (2) heat-treating the blank after hole drilling; (3) acid-washing the blank after heat treatment; (4) coping, lubricating, cold drawing and rolling, and deoiling the acid-washed blank; (5) judging whether a finished product requirement is met, if so, implementing solid solution heat treatment, straightening, stationary cutting and acid washing on a finished product; (6) if not, implementing solid solution heat treatment, straightening, stationary cutting and acid washing on an intermediate product, and repeating the step (4); and (7) inspecting the finished product, spraying words, packaging and weighing the finished product, and delivering the finished product out from a warehouse. According to the stainless-steel seamless pipe, the corrosion resisting performance of the surface is enhanced, the performance standard is optimized, the manufacturing cost is lowered and the production process is simple.

Description

technical field [0001] The invention relates to the manufacture of a stainless steel seamless steel pipe, in particular to a low-carbon nickel-chromium-molybdenum-niobium alloy stainless steel seamless steel pipe. Background technique [0002] Stainless steel seamless steel pipe is a long strip of steel with a hollow section and no seams around it. It is a steel pipe that is resistant to weak corrosive media such as air, steam, and water, and chemically corrosive media such as acids, alkalis, and salts. Also known as stainless acid-resistant steel pipe, with the implementation of my country's reform and opening up policy, the national economy has achieved rapid growth, and a large number of urban residences, public buildings and tourist facilities have been built, which puts forward new requirements for hot water supply and domestic water supply. Especially water problems, people more and more valued, pleas also driving forward. Galvanized steel pipe, a commonly used pipe ...

AI Technical Summary

Problems solved by technology

Due to the comprehensive and good comprehensive properties of low-carbon nickel-chromium-molybdenum-niobium alloy, it has been widely used in various industries, which makes the traditional low-carbon nickel-chromium-molybdenum-niobium alloy unable to meet the requirements. The traditional seamless steel pipe production The method makes low-carbon nickel-chromium-molybdenum-niobium alloy, which not only wastes resources, but also complicates the process

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