7MN15 mold steel raw material round bar clinker round bar

7mn15cr2al3v2wmo

——7mn15cr2al3v2wmo High Wear-Resistant Non-Magnetic Steel

Properties

What is 7mn15cr2al3v2wmo material? 7mn15cr2al3v2wmo, fully named 7mn15cr2al3v2wmo non-magnetic steel, is a high Mo-V series non-magnetic steel. 7mn15cr2al3v2wmo material maintains stable austenite in various states, has very low magnetic permeability, high high-temperature strength and hardness, and high wear resistance. Due to the cold working hardening phenomenon of high manganese steel, machining is relatively difficult, requiring a high-temperature annealing process that can alter the particle size, morphology, and distribution of carbides, thereby significantly improving the machinability of non-magnetic steel. Using gas nitrocarburizing heat treatment process can further increase the surface hardness of the steel, enhance wear resistance, and extend the service life of molds.

Chemical Composition

Chemical composition of 7mn15cr2al3v2wmo non-magnetic steel

C 0.70    Si 0.80    Mn 15.2    Cr 2.0    W 0.6    Mo 0.6    V 1.7    Al 2.1    Cu 0.03

Applications

7mn15cr2al3v2wmo non-magnetic mold steel plate is suitable for making non-magnetic molds in the electronics industry; non-magnetic bearings and other structural parts that require no magnetic induction in strong magnetic fields; hot work molds in industrial applications at 700-800°C; non-magnetic cold work molds, plastic and rubber molds; magnetic plastics, magnetic field forming molds; wear-resistant non-magnetic tools; EDM molds; non-magnetic molds for magnetic material factories; and precision mold components such as exhaust valves for gasoline and diesel engines that are subject to high intensity.

Characteristics

7mn15cr2al3v2wmo non-magnetic material, due to its low magnetic permeability and high mechanical strength, is applied in permanent magnet motors. However, its high hardness and toughness add to the difficulty of machining the material.

Heat Treatment Solution and Aging Process

7mn15cr2al3v2wmo annealing temperature is 880-900°C, holding time 3-6 hours, furnace cooling, air cooling below 500°C, hardness 28-30 HRC; microstructure is fine-grained austenite + uniformly distributed carbide particles. 7mn15cr2al3v2wmo solution temperature is 1170-1190°C, holding for 15-20 minutes, water cooling. Non-magnetic steel aging treatment temperature is 650-700°C, aging for 15-20 hours, air cooling, hardness ≥45 HRC.