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Technology

Investment casting

3D printed with wax, components produced in investment casting

Applications

For applications that require a surface in injection molding quality, but whose geometry is too complex or too costly for conventional manufacturing.

Advantages

A combination of the advantages of 3D printing and the casting process

 

Hybrid technology combines 3D printing with casting. This allows the advantages of both technologies to be utilized.

The 3D data is printed with a wax printer. The printed models are then freed from their support structure and bonded to prefabricated abutments. These are immersed in a special liquid silicate ceramic by means of a robot and then sanded. This process is repeated with a wide variety of slurry and sanding materials until the required ceramic layer thickness is achieved. Using a steam autoclave, the wax model is now released and the mold shell is fired in the sintering furnace at over 1000°C.

The desired alloy can now be melted. Now the desired alloy can be melted and poured into the preheated ceramic shell. After cooling, the shell can be removed mechanically and the castings reworked. Heat treatment for normalizing and or tempering follows for most alloys.

 

Suitable materials

1.0558 Quality structural steel GS-60 (Ge 300)

Structural steel processed with the hybrid technology investment casting

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Hardness= max. 162 HB
  • Re= max. 380 N/mm2
  • Rm= max. 602 N/mm2
  • A= 22.5%
  • Density=7.85 kg/dm3
  • Machinability: good
  • Weldability: good

Applications:

Shipbuilding
Automotive industry (car body)
Mechanical engineering
Plant engineering

Structural steel processed with the hybrid technology investment casting. Offers the advantages of both processes.

2.4671 Inconel 713c Nickel-cobalt alloy

Material processed with investment casting technology, for applications in the high temperature range up to 900°C.

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Hardness= max. 414 HB
  • Re= max. 817 N/mm2
  • Rm= max. 952 N/mm2
  • A= 4.3 %
  • Density=7.85 kg/dm3
  • Machinability: heavy, high wear
  • Weldability: limited with TIG, EB welding possible

Applications:

Automotive industry (turbochargers)
Engine construction (compressors, impellers)
Plant engineering (aggressive media)
Racing (valves, manifolds)

Inconel 713c has a high corrosion resistance. When heated, a thick, stable oxidation layer is formed that protects the surface. The strength of the material is maintained over a wide temperature range. The metal alloy is particularly suitable for applications exposed to high temperatures up to 900°C.

The material is processed using investment casting technology.

 

 

3.2384 AlSi7Mg0.6 Aluminum Casting Alloy

With investment casting processed aluminum casting alloy.

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Hardness= max. 92 HB
  • Re= max. 199 N/mm2
  • Rm= max. 258 N/mm2
  • A= 2.4 %
  • Density=2.68 kg/dm3
  • Machinability: easy
  • Weldability: good

Applications:

Automotive industry
Mechanical engineering
Plant engineering
Model making

Cast aluminum alloy processed with hybrid technology investment casting.

 

1.4308 GX6CrNi 18 9 Stainless steel

Stainless steel processed with the technology investment casting

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Hardness= max. 165 HB
  • Re= max. 224 N/mm2
  • Rm= max. 524 N/mm2
  • A= 54.8 %
  • Density=7.88 kg/dm3
  • Machinability: good - medium
  • Weldability: good
  • Food grade

Applications:

Parts for food and beverage industrial plants.
Use in the chemical industry (without chloride contamination)
Architecture, pump and valve technology, pipes and distributors, filter presses

The cast version of 1.4301 is only slightly better machinable

The material is processed using investment casting technology.

1.4848 GX40CrNiSi 25 20 Stainless steel

Heat resistant stainless steel processed with technology investment casting

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Hardness= max. 215 HB
  • Re= max. 323 N/mm2
  • Rm= max. 635 N/mm2
  • A= 24.4 %
  • Density=8 kg/dm3
  • Machinability: good -medium
  • Weldability: good
  • Temperature resistant

Applications:

Automotive industry (turbochargers, manifolds, parts for hot gas ranges - 950°C )
Mechanical engineering (flow elements, parts for stable hot gas ranges 900-1100°C )
Plant engineering (for oil and gas, valve bodies)

Heat resistant stainless steel processed with technology investment casting

 

 

1.4841 GX15CrNiSi 25 20 Chrome-nickel steel

Heat resistant chrome nickel steel

3D-Druck-Materialien-Jellypipe-Platzhalter-Bild

Features:

  • Hardness= max. 166 HB
  • Re= max. 243 N/mm2
  • Rm= max. 544 N/mm2
  • A= 45.1 %
  • Density=8 kg/dm3
  • Machinability: good-medium
  • Weldability: good
  • Chemical resistance
  • Temperature resistant

Application:

High temperature components in mechanical engineering
Apparatus engineering
Furnace construction

1.4841 is a heat-resistant chromium-nickel steel. It is chemically resistant up to approx. 1100°C, has medium corrosion resistance. In addition, the material has good heat resistance due to the higher content of chromium and nickel. The chromium-nickel steel has good strength and mechanical properties at high temperatures.

The material is processed using investment casting technology.

 

Note about material properties

Note: Please note that the listed values of the properties (e.g. tensile strength) refer to the properties of the material in an unprocessed state. Hoffmann AM can not guarantee the information below. In the printed state, the values may deviate from the specifications.

If a material in practice is pushed to the limits of the stated values, the component itself should be tested. If you have any questions, please do not hesitate to contact us.