METHOD FOR PRODUCING A COMPONENT FROM MAX PHASES

Abstract

For the first time, components can be produced from MAX-phases due to the use of an additive production method. A method for producing a component from MAX phases, in particular from Ti.sub.3SiC.sub.2 and/or Cr.sub.2AlC, in which an additive manufacturing process is disclosed. Powder is applied layer by layer and densified, the grain sizes of the powder lying at 10 m to 60 m, in which the scanning speed between the energy beam of the laser or electron beam and substrate with powder lies between 400 mm/s and 2000 mm/s, in particular at 1000 mm/s to 1500 mm/s, in which the power output is between 80 W and 250 W, in particular is 100 W to 170 W, in which a spot size of the energy beam lies between 30 m and 300 m.

Claims

1. A method for producing a component from MAX phases, Ti.sub.3SiC.sub.2 and/or Cr.sub.2AlC, in which an additive manufacturing process is used, in which powder is applied layer by layer and densified, the grain sizes of the powder lying at 10 m to 60 m, in which the scanning speed between the energy beam of the laser or electron beam and substrate with powder lies between 400 mm/s and 2000 mm/s, in which the power output is between 80 W and 250 W, in which a spot size of the energy beam lies between 30 m and 300 m.

2. The method as claimed in claim 1, in which the powder has been produced by gas atomization.

3. The method as claimed in claim 1, in which the powder has been produced by a grinding process.

4. The method as claimed in claim 1, in which the method is carried out under a shielding gas atmosphere.

5. The method for producing a component from MAX phases as claimed in claim 1, wherein the scanning speed between the energy beam of the laser or electron beam and substrate with powder lies between 1000 mm/s and 1500 mm/s.

6. The method for producing a component from MAX phases as claimed in claim 1, wherein the power output is between 100 W and 170 W.

Description

SUMMARY

[0009] An aspect relates to solving the aforementioned problem.

[0010] It is proposed to produce the MAX phases in near net shape or in net shape by means of selective laser melting (SLM).

[0011] This can be performed by two routes:

[0012] 1) by means of mixed powders of the individual components of the MAX phase; or

[0013] 2) by means of powder with the correct stoichiometry of the MAX phase.

[0014] The process data for the production process by means of the SLM process are as follows for the MAX phases, specifically however for Ti.sub.3SiC.sub.2 and Cr.sub.2AlC: the grain size of the powder lies at 10 m-60 m, either gas-atomized or ground.

[0015] The following is proposed as a possible process window: [0016] scanning speed: 400-2000 mm/s, preferably 1000-1500 mm/s [0017] power output: 80-250 W, preferably 100-170 W [0018] spot size: 30-300 m.

[0019] In particular, a laser is used as the energy beam.

[0020] The processing of the alloy under a shielding gas leads to a low oxygen component in the matrix.