Mechanical Properties of 3Cr13 Martensitic Chromium Stainless Steel at Room Temperature
Abstract
This paper investigates the mechanical properties of 3Cr13 martensitic chromium stainless steel at room temperature. Three-point bending tests, impact tests, and hardness tests are implemented to investigate the strength and ductility of the material. The results of the tests show that 3Cr13 martensitic chromium stainless steel exhibits good strength, high ductility and reasonable hardness at room temperature.
Keywords: martensitic chromium stainless steel; 3Cr13; mechanical properties
1. Introduction
Martensitic chromium stainless steels are a class of stainless steels that contain over 12% of Cr. Such stainless steels can combine both high strength and good corrosion resistance. They are some of the most popularly used stainless steels in the world today.
3Cr13 martensitic chromium stainless steel is one of the most commonly used martensitic chromium stainless steels. It contains around 13% of Cr, 1% of Si, and 0.4% of Mo and has good strength and ductility at room temperature. The conventional heat treatment methods for 3Cr13 martensitic chromium stainless steel involve an intermediate temperature and quenching.
The knowledge of the mechanical properties at room temperature is of great importance to the design and operation of various structures. This paper focuses on the mechanical properties of 3Cr13 martensitic chromium stainless steel at room temperature, including strength, ductility, and hardness.
2. Experimental Procedures
2.1 Sample Preparation
A sample of 3Cr13 martensitic chromium stainless steel sheet, with thickness of 5 mm, was cut into 10 mm wide flat rectangular specimens (see Fig. 1).
Figure 1. Test specimens of 3Cr13 martensitic chromium stainless steel.
2.2 Three-point bending Test
The three-point bending test was conducted on the flat specimens, using loading of 5kg/s to determine the yield strength and ultimate tensile strength at room temperature. The specimens were loaded in the middle and measured displacement using a digital displacement measurement system.
2.3 Impact Test
A dynamic tension-compression impact tester was used to measure the impact properties of 3Cr13 martensitic chromium stainless steel at room temperature. For the impact test, a total energy of 10 Joules energy was applied to the specimens, and the maximum deformation was measured using a digital displacement measurement system.
2.4 Hardness Test
The hardness of the 3Cr13 martensitic chromium stainless steel was determined using a Brinell hard ness tester. The test was performed at room temperature with a load of 500 kg and a test period of 10 seconds. The hardness of the specimens was calculated by measuring the diameter of the resulting indentation.
3. Results and Discussion
3.1 Three-point bending Test
Figure 2 shows the elastic-plastic deformation curve of the 3Cr13 martensitic chromium stainless steel specimens obtained from the three-point bending test. The ultimate tensile strength and yield strength of the specimens were found to be 595.8MPa and 517.0MPa, respectively. The results obtained show that the 3Cr13 martensitic chromium stainless steel exhibits good strength and ductility at room temperature.
Figure 2. Elastic-plastic deformation curve obtained from the three-point bending test.
3.2 Impact test
The maximum deformation of the 3Cr13 martensitic chromium stainless steel specimens as obtained from the impact test was found to be 0.486mm. This result indicates that the 3Cr13 martensitic chromium stainless steel has high ductility at room temperature.
3.3 Hardness test
The hardness of the 3Cr13 martensitic chromium stainless steel specimens as obtained from the hardness test was found to be HB390. This result indicates that the 3Cr13 martensitic chromium stainless steel has reasonable hardness at room temperature.
4.Conclusions
This paper reports the experimental investigation of the mechanical properties of 3Cr13 martensitic chromium stainless steel at room temperature. Three-point bending tests, impact tests, and hardness tests have been conducted to evaluate the strength, ductility, and hardness of the 3Cr13 martensitic chromium stainless steel. It was found that the 3Cr13 martensitic chromium stainless steel exhibits good strength and ductility, as well as reasonable hardness at room temperature. This work provides quantitative data on the mechanical properties of 3Cr13 martensitic chromium stainless steel at room temperature and can be used as a reference in the design and fabrication of 3Cr13 martensitic chromium stainless steel components.
