A ferritic stainless steel wire and wire rod excellent in corrosion resistance, cold-rolling ability and toughness having reduced surface defects and magnetic property

Abstract

The present invention provides a ferritic stainless steel wire and wire rod excellent in corrosion resistance, cold-rolling ability and toughness having reduced surface defects and magnetic property for obtaining the same quality of an austenitic stainless steel wire and wire rod production method with the reduced cost. This ferritic stainless steel wire and wire rod contains, in terms of mass, C: 0.003-0.04%, Si: 0.05-1.0%, Mn: 0.05-0.5%, P: less than 0.04%, S: less than 0.005%, Cr: 10.5-18.0%, O: less than 0.010%, N: 0.003-0.04%, and optionally contains one or more of Nb: 0.1-0.8%, Ti: 0.01-0.5%, and further optionally contains one or more of Al: less than 0.1%, V: 0.03-1.0%, and satisfy the equations of [Al]x[N] <= 0.0020, [V]x[N] <= 0.016 and [Mn]+[Cr]+[Si] <= 20%.

Description

[0001] This application is a divisional application of the patent application with the application number 200510080458.3, the application date is July 1, 2005, and the invention title is "magnetic stainless steel wire or steel wire with excellent corrosion resistance, cold workability and toughness". technical field [0002] The present invention relates to products related to inexpensive stainless steel wires that require magnetic properties and corrosion resistance, such as fasteners, mechanical forging parts, electromagnetic parts, wire ropes, wire mesh screens, flat steel wires, etc. Ferritic stainless steel wire and its products can be manufactured by the same general manufacturing process as ferritic stainless steel. Background technique [0003] Until now, products such as fasteners, which require cold workability, corrosion resistance, and toughness, have been manufactured by drawing, split annealing, and cold working of austenitic stainless steel wires such as SUS304...

AI Technical Summary

Problems solved by technology

[0007] However, since these ferritic stainless steel wire rods are rolled under different rolling conditions from ordinary wire rods, surface defects such as wrinkle defects and thermal bonding defects may occur, so they cannot be produced cheaply.

[0008] Furthermore, since these ferritic stainless steel wires have conventionally been annealed in batches at 850°C or below and then pickled, there is a production cost ratio of split annealing (bright annealing) at about 900°C or above. The problem of higher austenitic stainless steel wire

Images