Magnesium rapid prototyping

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Magnesium profile deep machining

Magnesium alloy

Introduction

Its machining and corrosion and mechanical properties have many characteristics: fast heat dissipation, light weight, good rigidity, certain corrosion resistance and dimensional stability, impact resistance, wear resistance, good attenuation performance and easy recycling; in addition, there are high Features of thermal and electrical conductivity, non-magnetic, good shielding and non-toxic. Application scope: Magnesium alloy is widely used in portable equipment and automobile industry to achieve the purpose of lightweight.

Although the specific gravity of magnesium alloy is heavier than plastic, its strength and elastic modulus per unit weight are higher than that of plastic. Therefore, with the same strength parts, magnesium alloy parts can be made thinner and lighter than plastic. In addition, because the specific strength of magnesium alloy is higher than that of aluminum alloy and iron, the weight of aluminum or iron parts can be reduced without reducing the strength of the parts. Magnesium alloy has the highest relative strength (ratio of strength to mass). The specific stiffness (ratio of stiffness to mass) is close to aluminum alloy and steel, much higher than engineering plastics.

Characteristics of magnesium alloy

Magnesium alloy AZ91D
Tensile strength Elongation at break Yield point Density Maximum temperature
230 MPa 3.0 % 150 MPa 1.81 g/㎤ 595 °C
Magnesium alloy AZ80A
Tensile strength Elongation at break Yield point Density Maximum temperature
290 MPa 2~5.0 % 179 MPa 1.80 g/㎤ 595 °C
Magnesium alloy ZK61B
Tensile strength Elongation at break Yield point Density Maximum temperature
330 MPa 12 % 178 MPa 1.80 g/㎤ 630 °C
Magnesium alloy AZ31B
Tensile strength Elongation at break Yield point Density Maximum temperature
280 MPa 8 % 160 MPa 1.76 g/㎤ 596 °C
Magnesium alloy AZ61B
Tensile strength Elongation at break Yield point Density Maximum temperature
280 MPa 14 % 165 MPa 1.80 g/㎤ 653 °C
Magnesium alloy AM60B
Tensile strength Elongation at break Yield point Density Maximum temperature
221 MPa 4.0 % 131 MPa 1.80 g/㎤ 482 °C

Surface treatment of die casting

Magnesium products machining factory

Smooth

The A-level finish adopts a machining method that uses mechanical, chemical or electrochemical effects to reduce the surface roughness of the workpiece to obtain a bright and smooth surface.

SPI standard:

A1 A2 A3
Magnesium profile manufacturers processing manufacturers

Semi-gloss

Grade B finishes use coarse sandpaper to produce parts that are rougher than Grade A parts. Custom molded plastic parts that have undergone B-level finishing have a matte surface texture.

SPI standard:

B1 B2 B3
Magnesium alloy extrusion molding machining

Matte finish

Grade C finishes use coarse sandstone to produce a rough, uneven surface. The C-level finished injection molded parts have a matte surface texture.

SPI standard:

C1 C2 C3
Machining after magnesium alloy

Textured

Class D finishes use gravel and dry glass beads or oxides to produce a very rough textured finish. Depending on the type of material used, the product can have a satin or matte finish.

SPI standard:

D1 D2 D3

3D printing post-machining

  • FDM

    Standard (no additional post-machining)

  • All surfaces must have a consistent visual appearance
  • Remove support structure
  • Remove excess support/building materials
  • All parts are printed with 3 outlines/peripheral shells or 1.2mm wall thickness
  • The minimum thickness of the top and bottom layers is 0.6 mm (6 layers, 100 microns)
  • SLA

    Standard (no additional post-machining)

  • The dimensional accuracy is ± 0.5%, and the lower limit is ± 0.15 mm
  • All support materials have been removed, and the support nibs are polished smooth
  • Excess resin must be drained from the hollow part.
  • For transparent resin, use polishing oil
  • Parts are fully cured to the material manufacturer’s specifications before shipment.
  • SLS/MJF

    Standard (no additional post-machining)

  • Remove all unmelted powder by bead spray (first time) and air spray (second time)
  • The air pressure range is 2-5 bar or 29-72.5 psi
  • Glass beads 70-110 microns in diameter
  • No additional post-machining required

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