This steel contains manganese 10% ~ 15%, and the carbon content is relatively high, generally 0.90% ~ 1.50%, and most of them are above 1.0%. Its chemical composition is (%): c0.90 ~1.50mn10.0 ~15.0si0.30 ~1.0s ≤ 0.05p ≤ 0.10, which is the most commonly used high-density fiber.
After pretreatment, the wear resistance of Mn 13 rolled steel plate is much higher than that of imported low-alloy wear-resistant steel, and of course it is far stronger than that of domestic wear-resistant steel NM420. But also has good cutting and welding performance.
Characteristics and application scope of Mn 13;
It has high tensile strength, plasticity, toughness and non-magnetism, even if the parts are worn thin;
It can still bear large impact load without breaking, and can be used for casting various impact-resistant and wear-resistant parts;
Such as ball mill liner, excavator bucket tooth, crusher tooth plate, etc. Generally used for simple structures;
Wear-resistant and low-impact castings are required, such as lining plates, toothed plates, broken walls, mortar walls, roller sleeves, shovel teeth, etc.
Extended data:
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The common heat treatment method of steel plate is solution treatment, that is, the steel is heated to1050 ~1100℃, and the as-cast structure is eliminated by heat preservation to obtain single-phase austenite structure, and then quenched with water to keep this structure at room temperature. After heat treatment, the strength, plasticity and toughness of steel have been greatly improved, so this heat treatment method is often called water toughening treatment.
The mechanical properties after heat treatment are σ B615 ~1275mpa σ 0.2340 ~ 470mpa ζ15% ~ 85% ψ15% ~ 45% akl96 ~ 294j/cm2 hb. When high manganese steel with austenite structure is subjected to impact load, the metal surface is plastically deformed.
The result of deformation strengthening is that there is obvious work hardening phenomenon in the deformed layer, and the surface hardness is greatly improved. It can reach HB 300 ~ 400 under low impact load and HB 500 ~ 800 under high impact load. Under different impact loads, the depth of hardened layer can reach 10 ~ 20 mm, and the hardened layer has high hardness and can resist impact abrasive wear.
High manganese steel has excellent wear resistance under the condition of strong impact abrasive wear, so it is often used to make wear-resistant parts in mining, building materials, thermal power and other mechanical equipment. Under the condition of low impact, because the work hardening effect is not obvious, high manganese steel can not give full play to the characteristics of the material.