Processes

SLM Selective Laser Melting 3D Printing Process Guide

SLM selective laser melting process principles, equipment specs, metal materials and applications. 99.5%+ density for high-performance metal parts.

SLM Selective Laser Melting 3D Printing Process Guide

SLM Selective Laser Melting

SLM uses high-power laser to fully melt metal powder, building dense metal parts layer by layer.

Working Principle

Recoater spreads a powder layer (20-60μm), fiber laser (200-1000W) melts powder following cross-section, platform descends, repeat until complete.

Key Parameters

  • Layer height: 20-60μm
  • Accuracy: ±0.05mm
  • Density: ≥99.5%
  • Laser power: 200-1000W
  • Max build volume: 500×500×530mm

Compatible Materials

316L stainless steel, 17-4PH, AlSi10Mg aluminum, Ti6Al4V titanium, Inconel 718/625, cobalt-chrome, copper alloy.

Pros & Cons

  • Pros: high density, near-wrought mechanical properties, complex geometry one-piece
  • Cons: high equipment cost, Ra 6-15μm surface needs finishing, thermal stress requires stress relief

Typical Applications

Aerospace structures, medical implants, conformal cooling molds, turbine blades, lightweight lattice structures.

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