Chromium-manganese-copper-molybdenum series austenite corrosion-resistant wear-proof stainless steel

Abstract

The present invention discloses one kind of anticorrosive and antiwear Cr-Mn-Cu-Mo austenite stainless steel comprising C 0.06-0.11 wt%, Mn 14-19 wt%, Si 0-3 wt%, P not more than 0.054 wt%, S not more than 0.03 wt%, Cr 16-18 wt%, N 0.1-0.4 wt%, Cu 1.0-2.5 wt%, Mo 0-3 wt%, Ni 0-2 wt%, Re 0-0.22 wt%, and Fe and inevitable impurity for the rest. The Cr-Mn-Cu-Mo austenite stainless steel has high strength, high toughness, high wear resistance, low nickel content and relatively low production cost.

Description

technical field [0001] The invention relates to austenitic stainless steel, in particular to a chromium-manganese-copper-molybdenum-based austenitic corrosion-resistant and wear-resistant stainless steel, which is used to replace the traditional 18-8 type austenitic stainless steel. Background technique [0002] 18-8 series austenitic stainless steel, such as 1Cr18Ni9, 1Cr18Ni9Ti, 0Cr18Ni9, etc. are traditional austenitic stainless steel, commonly known as "304". , It has been widely and stably used in production for a long time. However, due to the high content of precious metal Ni in this type of steel, the product price is very expensive. In addition, Ni resources are very scarce in the world, and the self-strength of this type of steel is low, and its resistance to wear and corrosion is relatively small. Therefore, a wider application space and many application fields are limited. Therefore, the development of a nickel-saving type that can replace the traditional 18-8 ...

AI Technical Summary

Problems solved by technology

Chromium-manganese-nitrogen series stainless steel (hereinafter referred to as 200 series steel) replaces Ni with Mn-N, the material cost is significantly reduced, and a series of changes occur in performance. After reducing Ni, in order to ensure the austenite structure must have sufficiently high Mn, C and N to increase the nickel equivalent, so the chromium manganese nitrogen series stainless steel has the following problems: (1) The tensile strength after solution treatment is high, generally 800-1100MPa; (2) The cold work hardening rate rises sharply, and the cold work strengthening coefficient K >15, the processing is difficult and the process cost increases; (3) 200 series steel has poor bending forming, cold heading and stamping properties; (4) traditional 200 series steel is very sensitive to intergranular corrosion, and adding stabilizing elements cannot Change its sensitivity; (5) Lack of research data on the performance of 200 series steel

200 series steel has a relatively higher content of stable austenite elements than 304, and its antimagnetic properties are better than 304. There are many problems in this type of steel, mainly because the composition design is not scientific and reasonable. In this type of steel, some It does not contain nickel, but its application is limited due to its high strength, low elongation, high cold work hardening index, low cold rolling yield, poor corrosion resistance, etc.