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Cr12MoV material heat treatment performance
Dec 22, 2017

Cr12MoV material heat treatment performance

Cr12MoV steel has two heat treatment process: the first process is called, low quenching low back, for the use of low temperature environment, has good toughness, with the tempering temperature, the hardness decreased the second is called high Quenching high, secondary hardening, with strong red hardness, and can be nitriding, the surface hardness to further improve, up to 68-72 ° heat treatment recommendations

Annealing: 820-880 ℃ Hardness: ≤ 229HB * Quenching temperature: 1010-1030 ℃, fast cooling.

Tempering temperature: 550-650 ℃, tempering three times, does not recommend the use of the maximum tempering temperature. * Hardness: 43 ~ 53 degrees HRC

This steel has high hardenability, cross-section can be completely hardened 400mm below, at 300-400 ℃ can still maintain good hardness and wear resistance. ※ This steel has a lower melting point, so the heating temperature should not be too high. ※ poor thermal conductivity, attention should be slow heating. ※ After forging must be slow to avoid cracks.

Can be placed in preheated pit, cooled to 400-500 ° C. After cooling can be annealed. ※ Usually three tempering, each 1-1.5h

Cr12MoV steel is a high-carbon, high-chromium, austenitic steel with a lower carbon content than Cr12 steel. The steel has high hardenability, cross-section can be completely hardened 300mm below the quenching volume change than Cr12 steel to be small. Therefore, 65mm will be able to get martensite. performance:

High-carbon, high-chromium type of martensitic steel, cobalt is not required as a plus element without special requirements. As the content of molybdenum and vanadium is higher than that of Crl2MoV, the microstructure and grain size of steel are further refined and the hardenability, strength and toughness of steel are improved, so that the comprehensive properties of steel are better. use:

Used in the manufacture of large, complex cold dies requiring high abrasion resistance such as cold cut scissors, trimming dies, drawing dies, thread rolling dies, thread rolling dies, curling dies and dies and punches requiring high wear resistance. The heat treatment system for the steel bar and forgings 960 degrees air + 700 ~ 720 degrees tempering, air cooling. The final heat treatment process, due to more, can give you a set of typical process: Quenching:

The first preheat: 300 ~ 500 ℃, the second preheat 840 ~ 860 ℃; quenching temperature: 1020 ~ 1040 ℃; cooling medium: oil, medium temperature: 20 ~ 60 ℃, cooled to oil temperature; , HRC = 60 ~ 63. Tempering:

After the above quenching process, can reduce the hardness effect, the specific tempering process is as follows: heating temperature 400 ~ 425 ℃, get HRC = 57 ~ 59.

Cr12MoV steel is a high-carbon, high-chromium, austenitic steel with a lower carbon content than Cr12 steel. The steel has high hardenability, cross-section can be completely hardened 300mm below the quenching volume change than Cr12 steel to be small.

The heat treatment system for the steel bar and forgings 960 degrees air + 700 ~ 720 degrees tempering, air cooling. The final heat treatment process, due to more, can give you a set of typical process: Quenching:

The first preheating: 300 ~ 500 ℃, the second preheating 840 ~ 860 ℃; Quenching temperature:

1020 ~ 1040 ℃; cooling medium: oil, medium temperature: 20 ~ 60 ℃, cooled to oil temperature; then, air cooling, HRC = 60 ~ Tempering:

After the above quenching process, can reduce the hardness effect, the specific tempering process is as follows: heating temperature 400 ~ 425 ℃, get HRC = 57 ~ 59.

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