Fatigue and Fracture Toughness of Martensitic Stainless Steel 2Cr13

The fatigue and fracture toughness of Martensitic Stainless Steel 2Cr13

This article aims to evaluate the fatigue and fracture toughness of Martensitic Stainless Steel 2Cr13. First, the mechanical properties of the steel are presented, followed by a discussion of the fatigue and fracture toughness results of repeated tension tests. Lastly, some potential improvements on the steel are discussed.

Martensitic Stainless Steel 2Cr13 is a high wear-resistance, corrosion-resistant ferrous alloy. It is an alloy composed of chromium, iron, and a small amount of carbon. Martensitic Stainless Steel 2Cr13 has excellent physical properties and corrosion resistance, making it an ideal choice for a variety of engineering applications.

In terms of mechanical properties, Martensitic Stainless Steel 2Cr13 has a tensile strength of 940-1010 MPa, and a hardness of 500-650 HB. Its yield strength, 0.2% offset yield strength and ultimate tensile strength are 553 MPa, 690 MPa and 940 MPa, respectively. The creep strain of the steel is 85 MPa, and the ultimate strain is 6.5%.

Next, the fatigue and fracture toughness of Martensitic Stainless Steel 2Cr13 were examined through repeated tension tests. The results show that the fatigue and fracture toughness of Martensitic Stainless Steel 2Cr13 are generally acceptable, with a fatigue limit of 635 MPa and a fracture toughness of 3.7 MPa.m0.5. The cyclic fatigue and fracture toughness performance of Martensitic Stainless Steel 2Cr13 remain acceptable even at high stress amplitude.

Finally, there are some potential areas for improvement in Martensitic Stainless Steel 2Cr13. For instance, the stress corrosion cracking resistance of the steel can be improved by increasing the chromium content of the alloy. Furthermore, the strength of the steel could be enhanced by cold working or by introducing new alloying elements. These modifications could potentially improve the fatigue and fracture toughness performance of Martensitic Stainless Steel 2Cr13 whilst maintaining its excellent physical and corrosion properties.

In conclusion, Martensitic Stainless Steel 2Cr13 exhibits adequate fatigue and fracture toughness performance. However, improvements could be made by introducing new alloying elements or cold working the steel. This could potentially improve the properties of the Martensitic Stainless Steel 2Cr13 and make it suitable for a wider range of applications.

Martensitic Stainless Steel 2Cr13 is a martensitic stainless steel that has good mechanical properties and corrosion resistance. The chemical composition of 2Cr13 is represented by the following table:

C%：≤ 0.15 Si%：≤ 1.00 Mn%：1.00 P%：≤ 0.04 S%：≤ 0.03 Cr%：12～14

2Cr13 has good mechanical properties and wear resistance after quenching and tempering treatment. It is also more wear-resistant than ordinary stainless steel. The strength of 2Cr13 is equivalent to 1045 steel. The corrosion resistance of 2Cr13 is mainly due to the high content of chromium and its passivation film, but the corrosion resistance of 2Cr13 is low, so it is not suitable for seawater, chemical and food processing.

2Cr13 has excellent fatigue and fracture toughness. The notch impact toughness of 2Cr13 is up to 42J. It is also resistant to stress corrosion cracking under alternating stress conditions and is a good material for wear parts. 2Cr13 is mainly used in the manufacture of plastic molds, cutting tools, sugarcane knives, food machinery and medical equipment.