Laser Hardness 1.0
Description:
Laser Hardness 1.0 calculates the minimum and maximum hardness obtainable for a given steel after laser surface hardening and stress relief tempering standard in oven (160°C x 2h at running, or equivalent).
The tool considers the percentages of martensitic transformation near to 100% derived from cooling from the mass of the workpiece, without the aid of refrigerant fluids.
The drop of surface hardness during the stress relief tempering is distinguished as a function of the percentage of alloying elements of the material.
Laser Hardness 1.0 evaluates the minimum and maximum C content on the product analysis.
Besides to the specific steels for surface hardening are even considered other typologies of steels that can be surface hardened for special applications.
For completeness even standards by now retired and replaced are quoted.
Conditions:
- absence of overall surface decarburizing
- minimum diameter or thickness of the workpiece that has to be surface hardened = 10 mm
- optimum austenitizing heating
- open die, drop forged or rolled materials in the quenched and tempered or normalized state
- austenitic grain dimension = 5 according to UNI 3245 : 1987 (similar to ASTM E 112-82)
- laser source type C02 o Nd:YAG, functioning pulsated or continuous
Usefulness:
- choice of the steel during designing
- inspection of the treatment during quality control
Caution:
Granit Engineering suggests a careful evaluation of the workpiece geometry and of the hardenability of the material with the aim to:
- obtain the desired effective hardening thickness
- limit the risk of cracking due to hardening
Usage:
- Choose the typology of steel of interest from the below list clicking on the related standard
- In the page related to the choice done, select the desired steel. Laser Hardness 1.0 will calculate the minimum and maximum HRC hardness obtainable after laser hardening and stress relief tempering for the selected steel
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Special unalloyed and alloyed steel finished products, open die and drop forged, quenched and tempered or normalized, suitable for surface hardening. Qualities,requirements and tests |
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Hot rolled, unalloyed and alloyed special steel products, bars and coils, for surface hardening. Qualities, requirements and tests |
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Hot rolled, unalloyed quench and tempering special steel products, bars and coils. Qualities, requirements and tests |
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Special unalloyed and alloyed steel finished products, open die and drop forged, quenched and tempered or normalized. Qualities, requirements and tests |
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Quenched and tempered steels - Technical delivery conditions for special steels |
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Quenched and tempered steels - Technical delivery conditions for unalloyed quality steels |
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Quenched and tempered steels. Technical delivery conditions for boron steels |
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Heat-treated steels, alloy steels and free-cutting steels - Ball and roller bearing steels |
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Hot rolled unalloyed steel finished products, bars and wire rod, for high speed machining with removal of chips. Qualities, requirements and tests |
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Free-cutting steels - Technical delivery conditions for semi-finished products, hot-rolled bars and rods |
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Hot rolled special alloyed steel products, bars and coils, for nitriding. Qualities, requirements and tests |
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Special alloyed steel finished products, open die and drop forged, for nitriding. Qualities, requirements and tests |
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Nitriding steels - Technical delivery conditions |
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Hot rolled special alloyed steel finished products, bars and wire rod, for quenched and tempered springs. Qualities, requirements and tests |