Ultra high manganese steel casting: ultra high manganese steel is a new type of steel developed on the basis of high manganese steel in recent years. At present, the ultra-high manganese steel put into the market by luobeng mine is to increase manganese content on the chemical composition of the original high manganese steel, increase chromium, molybdenum and tungsten alloy elements, make the casting reach good toughness, high initial hardness, improve the wear resistance life of the casting before it begins to produce work hardening layer at the early use stage, and the work hardening degree is also higher than that of high manganese steel. Wear - resistant properties are much better than high manganese steel.

China's current general wear resistant material series of high manganese steel series: such as high manganese steel (ZGMN13),

High manganese alloy (Zgmn13Cr2MoR), ultra-high manganese alloy (Zgmn18Cr2MoR), etc.

High manganese steel (such as ZGMN13) under severe impact or contact stress, its surface will rapidly harden, while the core still maintains a strong toughness, hard outside and tough inside both wear resistance and impact resistance.And the heavier the impact on the surface, the more full the surface hardening, the better the wear resistance.Because the hardness of high manganese steel itself is very low (HB170-230), the wear resistance is extremely limited before hardening. If the surface of high manganese steel is not enough to bear the impact force, the surface can not be fully hardened (after full hardening, the surface hardness can reach HB550 or below, otherwise), then the wear resistance will not play a role, and the wear resistance will not be shown.

Because Zgmn18Cr2 contains more manganese, the surface hardening can be more sufficient, so more wear-resistant.

Of course, ZGMN18Cr2 series (such as ZGMN18Cr2MORE) is also more expensive than ZGMN13 series.

I. comparison of ultra-high manganese steel and high-manganese steel:

L. Higher initial hardness than high manganese steel, HB 250-300. 2. With the same impact toughness, the casting will not suffer from early fracture. 3. The service life of casting is 1.5 -- 2 times that of high manganese steel.

4, from the perspective of economic benefits analysis of ultra-high manganese steel than high manganese steel cost-effective, because the service life in 1. More than 5 times, and casting production cost is only 1.3 times of high manganese steel.

Ii. Recommended products:

Because ultra high manganese steel and high manganese steel have long service life, but the price is also high. We think ultra-high manganese casting is suitable for the following conditions.

(1) wear fast, less weight, difficult to install the casting using ultra-high manganese steel for good, such as hammerhead, sieve board, lining board, jaw broken machine tooth board.

(2) the abundant funds of the enterprise ball mill lining board also USES ultra-high manganese steel, the first investment of capital is a bit larger, from the economic benefits on the calculation is cost-effective.

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