| Product name | Mill liner plate |
| Material | Alloy steel,Carbon steel,Carburizing steel,Quenched and tempered
steel |
| Heat treatment | Normalizing,Annealing,Quenching&Tempering, Surface
Quenching,Case hardening |
| Machining | CNC Turning,CNC Milling,CNC Boring,CNC Grinding,CNC Drilling |
| Gear Machining | Gear Hobbing,Gear Milling,CNC Gear Milling,Gear Cutting,Spiral gear
cutting,Gear Cutting |
| Inspection | Chemical Composition Test,Ultrasonic Test,Penetration
Test,Radiographic Test,Magnetic Test,Tensile Strength Test,Impact
Test,Hardness Test,Dimension Test |
| Apply to | SAG/AG mill, ball mill, rod mill,etc. |
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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