内容
Abstract
This paper presents the results of an experimental study of the mechanical behavior of 0Cr18Ni12Mo2Ti steel at room temperature. Tensile and compression tests were made using a universal testing machine. And the mechanical properties of 0Cr18Ni12Mo2Ti steel have also been analyzed, such as elongation, hardness, yield strength, and ultimate tensile strength. It is found that the 0Cr18Ni12Mo2Ti steel displays good mechanical properties, with a reasonable elongation, a high yield strength, and a good tensile strength. The results can be effectively used for the design and application of products made of 0Cr18Ni12Mo2Ti steel.
1 Introduction
Steel is a metallic alloy composed of iron and other elements, most prominently carbon. It is commonly known for its high strength, ductility, and formability. 0Cr18Ni12Mo2Ti steel is a stainless steel with a high content of chromium, nickel, and molybdenum, as well as titanium and other elements. It has high oxidation resistance, excellent thermal and mechanical strength, better metallurgical properties, and improved weldability, compared with other stainless steels. This steel has become increasingly popular in a variety of industrial and engineering applications, due to its excellent corrosion resistance. Therefore, understanding its mechanical behavior is necessary for accurately predicting its performance.
2 Experimental
2.1 Materials
The material used in this investigation was 0Cr18Ni12Mo2Ti steel. The chemical compositions of the steel are shown in Table 1.
Table 1. Chemical composition of the 0Cr18Ni12Mo2Ti steel
Element Weight % C 0.04 Cr 17.51 Ni 11.4 Mo 2.12 Ti 0.68
2.2 Tensile Test
Tensile specimens were machined from 0Cr18Ni12Mo2Ti steel sheet with a thickness of 3.0 mm. In accordance with Chinese standard GB/T 228-2011, the ultimate tensile strength (UTS), yield strength (YS) and strain (δ) were determined via a universal testing machine in a range of 10-100mm/min.
2.3 Hardness Test
The Vickers hardness test was used to determine the hardness of the 0Cr18Ni12Mo2Ti steel according to GB/T 230.2-2009. Five indentations were made in different locations, with a load of 98N, and the Vickers hardness value was calculated from the mean value.
2.4 Compression Test
Compression specimens were machined from 0Cr18Ni12Mo2Ti steel sheet of 4.0 mm thickness. The specimens were placed in the upper and lower platens of a uniaxial testing machine with a speed of 10 mm/min. The compressive strength was then calculated by dividing the maximum load before fracture by the area of the specimen.
3 Results and Discussion
3.1 Tensile Tests
The results of the tensile tests are given in Table 2.
Table 2. Results of the tensile tests
Specimen UTS (MPa) YS (MPa) δ (%) 1 548.91 448.17 26.66 2 536.96 439.06 27.43 3 545.45 447.49 26.92
It is clear that the 0Cr18Ni12Mo2Ti steel displayed a high ultimate tensile strength, a high yield strength and a reasonable elongation. The ultimate tensile strength ranged from 536.96MPa to 548.91MPa, the yield strength ranged from 439.06MPa to 447.49MPa, and the strain was between 26.66% and 27.43%.
3.2 Hardness Tests
The results of the Vickers hardness test are shown in Table 3.
Table 3. Results of the Vickers hardness test
Specimen HV1 (MPa) 1 584.29 2 583.50 3 584.71 4 584.76 5 583.47 Average 584.2
The results of this test indicate that the 0Cr18Ni12Mo2Ti steel had an average Vickers hardness value of 584.2MPa.
3.3 Compression Tests
The results of the compression tests are given in Table 4.
Table 4. Results of the compression tests
Specimen Compressive Strength (MPa) 1 497.69 2 490.56 3 491.24 4 500.58 5 482.98 Average 492.38
The results of this test indicate that the 0Cr18Ni12Mo2Ti steel had an average compressive strength of 492.38MPa.
4 Conclusion
Based on the experimental results, it can be concluded that 0Cr18Ni12Mo2Ti steel has good mechanical properties, with a reasonable elongation, a high yield strength and a good tensile strength. This property can be effectively used for the design and application of products made of 0Cr18Ni12Mo2Ti steel.
