Performance comparison between high toughness crack arrest wear-resistant steel and conventional wear-resistant steel
“Crack arrest steel” refers to the steel with good fracture toughness and the characteristics of inhibiting the propagation of brittle cracks, and has the ability to prevent cracks from spreading at a high speed. When there are potential defects or cracks in the component, the crack arrest steel is subject to dynamic load and impact load Under this condition, it can prevent the expansion of cracks in a small area and prevent the occurrence of major accidents.
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The main materials are NM400Tuf, NM450Tuf, NM500Tuf;
While NM450Tuf products ensure the same wear resistance, the impact energy at -20°C can reach 110J, the low-temperature toughness is more than 2 times that of the same level of wear-resistant steel, and it exceeds the national standard by 4 times, and it can serve in the environment of -60°C. And the service life is doubled, and the cost of welding and other processing processes is not increased.
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Figure 1 Performance requirements of high toughness crack arrest wear-resistant steel
Figure 2 Comparison of wear volume loss between new corrosion-resistant and wear-resistant steel and ordinary NM450 wear-resistant steel in corrosive environment
Figure 3 Comparison of the impact properties of the new high toughness crack arrest wear-resistant steel NM450Tuf and conventional wear-resistant steel
The dump trucks with upgraded materials have greatly improved tensile strength and elongation under the premise of unchanged wear resistance, effectively alleviating problems such as deformation and cracking of the vehicle’s stress release compartment caused by various external forces.
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Therefore, the good low-temperature impact toughness of the material solves the cracking problem that may occur in conventional high-strength wear-resistant steel (NM450) under extreme working conditions, enabling the whole compartment to challenge the ultimate impact resistance and achieve a rise in overall performance. It is currently the practical application of special vehicle compartments. One of the materials with the highest comprehensive performance.
Post time: May-25-2023
