Do You Have Problems with Wear, Galling Or Corrosion on Stainless Steel?

MARTENSITIC

DUPLEX

Do you have problems with wear, galling or corrosion on stainless steel?

AUSTENITIC

FERRITIC ExpaniteHigh-T

A high-temperature solution-nitriding process pushing nitrogen deep into the bulk material. This re-establishes the core High-T hardness of the material, which creates a unique load-bearing capacity and secures corrosion resistance second-to-none.

Benefit: 250-750HV* Get all the best things of annealing while maintaining core hard- Hardness ness and increasing corrosion resistance. 500-1000µm*

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ExpaniteLow-T

A low-temperature nitrocarburizing process, by which a Then the Expanite process double hardened zone containing nitrogen and carbon is Nitrogen 1000-1500HV* established. Nitrogen adds increased surface hardness while Carbon carbon bridges the gap to the softer core. A smooth hardness is the solution. profile is tailored! Hardness Benefit: Controlled surface hardness between 1000-1500HV. 5-35µm*

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SuperExpanite

By combining the ExpaniteHigh-T and ExpaniteLow-T process-

es you get a previously unseen surface hardness founded on 1000-1500HV* Low-T top of a bulk material, which has very strong loadbearing ca- High-T pacity. Superior corrosion, wear and fatigue properties is the outcome – SuperExpanite is simply setting new standards for what can be achieved by surface-hardening stainless steel. Hardness

Benefit: Superior corrosion, wear, scratch and fatigue properties. 500-1000µm*

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* Exact values depend on alloy, application and requirements Whatever your stainless steel alloy, Whatever your alloy, Expanite can there is always an Expanite solution. improve your performance.

EXPANITE EXPANITE ALLOY PROCESS CASE EXAMPLE PROBLEM PROCESS BENEFIT

Significant improvement of the corrosion resistance due to the Corrosion and long delivery Back ferrules for assembly of oil Super Expanite process. Significant * SuperExpanite times with the current surface SuperExpanite AUSTENITIC and gas pipes. improvement of the delivery time treatment. ExpaniteHigh-T due to on-site treatment solution at the customer.

Using the SuperExpanite process, The primary reason for wear and the propeller life time is increased DUPLEX SuperExpanite Ship propeller. breakage of ship propellers is cav- SuperExpanite by a factor of 3, resulting in much ExpaniteHigh-T itation erosion. fewer repairs and thereby a reduction in the need for back-up ships.

Due to insufficient hardness of the Because of the surface hardening screw body combined with the need capabilities of the Expanite process, to avoid corrosion of the screw the customer was able to use a mo- SuperExpanite head, the customer had chosen a Self-tapping screw. ExpaniteHigh-T no-block stainless steel screw. The FERRITIC solution where non-stainless steel ExpaniteHigh-T result was a reduction in cost and with sufficient hardness was welded time because welding was no longer ExpaniteLow-T together with a screw head of stain- required. less steel.

With the increasing requirements for better fuel economy, the de- Using the Expanite process, we in- Valve plate and seat for fuel injec- mand for increased pressure at creased the hardness of a marten- SuperExpanite ExpaniteHigh-T MARTENSITIC* tion pumps. which fuel is injected into an en- sitic alloy to a level that allows the ExpaniteHigh-T gine is rising. This means new re- use of pressures up to 300bar. quirements for wear resistance.

* Including precipitation hardenable steels Goes beyond the surface ...and to make you This is how we do it: to reduce lead time and costs. more competitive! Oxide layer Nitrogen Carbon

Stainless steel Day-to-day treatment On-site treatment Not just another coating You can choose to have your material processed in our facilities on a day- The Expanite treatment effectively removes the oxide film covering stainless to-day basis. Unlike existing solutions the Expanite process is fast, versatile • Maximum flexibility and steels. This allows controlled incorporation of carbon and nitrogen atoms in the The stainless steel surface is covered with a and with no restrictions on the geometrical shape or size of the parts. The independence underlying metal. The hardened layer is characterized by an interstitial hardened thin oxide film. The oxide film acts as a bar- flexibility and efficiency of the solution means that we can get your parts back zone. We call this zone expanded austenite, expanded martensite, or simply, Ex- rier for the transfer of carbon and nitrogen to you in a matter of days. • Day-to-day processing panite. atoms to the metal.

Streamline it into your own production line • Full traceability Unlike other technologies, this method does not merely coat the surface. The process goes into and beyond the surface to create a hardness profile with an You can also opt for a fully automatic solution installed directly in your pro- Gas duction line. Contrary to any other surface hardening processes we made it optimal concentration of carbon and nitrogen. This significantly improves cor- possible to install and run the furnaces in your premises – and hereby elimi- Expanite Treatment Center rosion, galling, fatigue and wear-resistance according to your particular needs. nating the cost, logistics and risks involved in shipping the parts for hardening. • Very short lead times Faster and more efficient Stainless steel The whole process is clean and super-efficient. Contrary to alternatives, including • Full traceability plasma and salt bath based methods; the Expanite process leaves no soot or other residues on the hardened surface, eliminating the need for post cleaning. The gaseous Expanite treatment removes Sampling and serial production • the oxide film and allows an incorporation of carbon and nitrogen atoms in the underlying metal. After the treatment, the oxide film layer is re-established naturally.

Hardened zone Nitrogen + Carbon

Stainless steel

As opposed to pvd or similar coating processes, the Expanite process does not result in a coating, but rather, a hardened surface zone with a higher concentration of carbon and nitrogen.

Expanite Treatment Center, Hillerød Expanite goes beyond the surface

The philosophy is quite simple; we want to offer the best solutions for Expanite processes... surface-hardening of stainless steel! ...are applicable to the most common From our state-of-art facility just north of Copenhagen, Denmark with stainless steel alloys incl. austenitic, full-size furnaces and laboratory capabilities – to the shop-floor of our martensitic, ferritic and duplex grades. customers - we are pushing the limits of what performance can be expected. ...are gaseous, thus properties can be Our patented* and proven technology, scientific know-how and flexible tailored to match your exact needs. delivery model significantly improves product performance, quality, and reduces costs. ...can deliver parts that withstand 1000+ hours in salt spray, while having a controlled With Expanite’s surface hardening process for stainless steel, you and your surface hardness of 1000-1500HV. customers will be much more competitive. ...run on a day-to-day basis, resulting in lead- times significantly lower than alternatives. * Patent number US 8,845,823 B2 ...can either be offered from our treatment centre or implemented on-site, directly in your production line.

Industrivænget 34 . 3400 Hillerød . Denmark [email protected] . expanite.com . +45 2819 6443