Harden Black
Functional/aesthetic treatment for an hard and protected surface
Color: black
Applications: carbon and stainless steels
Properties: hardening, anti-oxidant, blackening
Harden Black is a thermo-chemical treatment aimed at hardening steel obtaining, at the same time, an high corrosion resistance and a reduced friction coefficient
Hardening
Alternative and more performing than traditional treatments such as nitriding and ferritic nitrocarburizing, resolves the need to raise the hardness of steels whether they are carbon, alloyed and/or tempered. The surface hardness can reach, depending on the type of steel, over 70 Hrc (over 1300 HV1). This allows to the treated part to benefit superior wear-resistance and abrasion-resistance properties compared to those offered by conventional treatments such as nitriding, ferritic nitrocarburizing, etc.
Anti-oxidant
Superior to blacking and phosphating, it is able to protect the steel from corrosion. Depending on the type of steel the treated parts exceed 700 hours of salt spray before the appearance of the first corrosion point: a remarkable result when compared to the performance obtainable through classic blacking and phosphating (which do not provide any surface hardening). The corrosion resistance further increases when combined with a low roughness of surfaces obtainable with Super Fin treatment.
Sliding
The treated parts obtain self-lubricating properties with a remarkable reduction of the friction coefficient. The smoothness benefits from a significant improvement and can further increase if combined with a low roughness of the surfaces obtainable with Super Fin treatment.
The treatment, penetrating into the material, hardens and blackens the steel giving an attractive black color difficult to reach with burnishing, black zinc plating or phosphating
Blackening
Alternative to phosphating, black zinc plating and blacking, it is able to blacken the steel homogeneously. The treated details will benefit of a bright and resistant black color pleasant to the eye as much as an anodizing (this last, as known, not applicable on steel). The treatment can also be applied on components already blackened.
High penetration
It is, for a large part, absorbed by the material: the penetration is variable from a minimum of 0.15 up to a maximum of 1mm. This penetration into the steel avoids the risk of flaking and/or detachment of flakes under mechanical or corrosive stresses as can happen with other treatments. Applied to particular steels, and with appropriate calibration of the process, it is possible to obtain extraordinary results in terms of hardness and depth so it is a valid alternative to cementation.
Reduced thickness
The thickness of the coating is limited to about 0.01 μm; a small thickness compared to other treatments such as blacking, zinc plating and phosphating. This property allows, in most cases, the application of the treatment also net of geometric dimensioning of the components and an easy application also on tolerance parts such as threads, pins, etc.
Harden Black can be applied to any type of steel whether it is carbon, stainless or strongly bonded
Stainless steels compatible
As in the case of blacking, phosphating or nitriding, it is compatible not only with carbon steels but also with all stainless steels, also tempered.
Mechanically performing
Often even without a geometric dimensioning that calculates the thickness of coating, it is also possible to apply it on shafts, compasses, gears and any other mechanical steel part that requires the described peculiarities. However, there are no minimum or maximum dimensions for the parts to be treated.
Unaltered resistance
Its use does not weaken the mechanical details because it allows to obtain a very hard "skin" on the soft heart parts. At the same time, in order to protect the intrinsic strength of steel components, the absolute absence of hydrogen in the process is guaranteed.
The treatment, with reduced environmental impact, allows the achievement of results not obtainable together by blacking, phosphating and nitriding
Suggested applications
→ Vintage car screws (Ferrari, Lamborghini, Porsche, etc.)
→ Supercar and hypercar frame details
→ Pins, shafts, compasses
→ Gears
→ Slide guides
→ Parts of firearms, muzzle brakes, etc
→ Blades, military cutlery, survival, mountain-climbing, etc
Questions to which the treatment answers
→ Which is an alternative and superior treatment to blacking?
→ Which is an alternative and superior treatment to phosphating?
→ Which is an alternative and superior treatment to black zing plating?
→ How to harden steel?
→ How to make the steel corrosion resistant?
→ How to increase the smoothness of steel?
→ How to blacken steel?
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The synergy between the treatments offered by Precise Technology allows the offer of a service unique in its kind: the possibility of submit the components to two or more treatments in order to follow all the process from beginning to the end and obtain an unsurpassed finished product.
The elements intended for Harden Black can be previously:
— Solvent or ultrasonic cleaned
— Re-pickled from previous treatments (e.g. zinc plating, blacking, nickel plating, etc.)
— Micro shot peened
— Polished or treated with Micro Fin
The Harden Black treated elements can receive other coatings such as:
— MicPol® impregnation
— Graphite coating or other molybdenum disulphide coatings
— Powder coating
Pick-up and delivery
The headquarter of Precise Technology SA is strategically located in Chiasso so that it can easily serve, through an organized logistics network, the whole Swiss territory, the whole Italian territory and, more generally, all Europe. Thanks to the pick-up and delivery service, the company can apply Harden Black treatment (which combines the beneficial properties of blacking, phosphating and nitriding) to corporate and private customers located in Italy, Switzerland and all Europe.
Galleria — Some of the components we Harden Black treated (as an alternative to blacking, phosphating or nitriding)
