7Mn10Cr8Ni10Mo3V2(7Mn10)_Non-Magnetic die steel

7Mn10Cr8Ni10Mo3V2 (7Mn10)
Non-magnetic die steel
Non-magnetic high manganese vanadium tool steel

7Mn10Cr8Ni10Mo3V2 (7Mn10) steel is a non-magnetic high manganese vanadium tool steel, has a very low permeability, high hardness and strength, good wear resistance, after appropriate heat treatment, with better overall performance . 7Mn10Cr8Ni10Mo3V2 (7Mn10) of steel used to make the 700 ~ 800 ℃ using a hot die and the non-magnetic cold mold.

7Mn10Cr8Ni10Mo3V2 (7Mn10) the chemical composition of steel:
C 0.65 ~ 0.75; Si ≤ 1.00; Mn9.00 ~ 11.00; Cr7.50 ~ 8.50; Mo2.50 ~ 3.00; V1.50 ~ 2.00; Ni9.00 ~ 11.00; P ≤ 0.030; S ≤ 0.030.

7Mn10Cr8Ni10Mo3V2 (7Mn10) and use the properties of steel:
7Mn10Cr8Ni10Mo3V2 (7Mn10) steel is a non-magnetic high manganese vanadium tool steel, in various states can maintain a stable austenite, with very low permeability, high hardness and strength, good wear , higher proper heat treatment (solution + aging), the good overall performance. Since the steel has high hardness and high temperature strength, used to make the 700 ~ 800 ℃ using a hot die and the non-magnetic cold mold.

7Mn10Cr8Ni10Mo3V2 (7Mn10) thermal processing of steel:
7Mn10Cr8Ni10Mo3V2 (7Mn10) steel forging process specification table below:
Project heating temperature / ℃ heating time / h initial forging temperature / ℃ final forging temperature / ℃ Cooling
Ingot 1150 ~ 1170 ≥ 8 1100 ~ 1120 ≥ 950 air-cooled
Billet 1140 ~ 1160 ≥ 8 1090 ~ 1110 ≥ 950 air-cooled

7Mn10Cr8Ni10Mo3V2 (7Mn10) heat treatment of steel:
Preparatory heat treatment (annealing):
High temperature annealing process, heating temperature 870 ~ 890 ℃, heat 3 ~ 6h, furnace cooling to below 500 ℃, cooled released after annealing hardness 28 ~ 30HRC, after annealing organizations to fine grain-like particles uniformly distributed austenite carbide. High temperature annealing process is to improve the 7Mn10Cr8Ni10Mo3V2 (7Mn10) steel cutting performance.
Solution and aging treatment:
Solution temperature is 1150 ~ 1180 ℃, water, solid solution hardness 18 ~ 25HRC. Aging temperature is 700 ℃, aging time 2h, hardness 46 ~ 47HRC.

7Mn10Cr8Ni10Mo3V2 (7Mn10) steel gas Nitrocarburizing:
In order to improve hardness and wear resistance of the mold, you can use the gas nitrocarburizing treatment. Nitriding temperature of 560 ~ 570 ℃, nitriding time of 4 ~ 6h, nitriding depth 0.03 ~ 0.04mm, nitrided layer hardness 950 ~ 1100HV.

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Source: HongChao(DongGuan) Mould & Technology Co.,Ltd.
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