HPM

◆ What is HPM?

  Conventional PM MIM HPM (All New)
Cost Low High Medium
Part Shape 2D 3D 2D
Sintered Density Low High High(same as MIM)
Mechanical Properties Fair Good Good (same as MIM)
Cosmetic Finish
  • PM

Powder size 50~100 um

  • MIM

Powder size below 15 um

  • HPM

Powder size below 15 um

  • Pre-treatment

Powder size 50~100 um

  • Sintering Temperature

1120-1250°C

1300~1400°C

◆ The effect of density

  • Density↑ Property↑
  1. Conventional PM
  2. Warm Compaction +High Temperature Sintering
  3. HPM and MIM

◆ Uniformity of Alloy Element(EPMA results)

  • PM (Distaloy® AE)

sintered density = 7.2g/cm³

  • HPM (4605 Modified)

sintered density = 7.6g/cm³

◆ AGMA 8 17-4PH Gear by HPM

Traditional PM Gear (6.67 g/cm3)

HPM Gear (7.55 g/cm3)

  Total Meshing Error(mm) Max. Meshing Error of Single Tooth(mm) Total Runout(mm)
AGMA 8 Spec. 0.0494 0.0279 0.0354
HPM Gear 0.0302 0.0108 0.0246

◆ AGMA 8 17-4PH Gear by HPM

  • High density>7.5g/cm3 (PM:<7.2)
  • High strength, high toughness
  • Low cost(MIM>HPM>PM)
  • Low tooling cost: MIM x 20~30%
  • Fast sample submission: 2~3 weeks
  • Less shrinkage:5~7%
  • Good tolerance : ±0.3% (MIM ±0.5% )
  • No gate marks, weld lines, sinks, etc.
  • New materials: 17-4PH, 4605 modified. (No MPIF Standards)

◆ Comparison between HPM and MIM

15.6 x 5.3 x 8.5 mm

Process MIM HPM
Tooling Design 8 Cav. 1 Cav. (1upper 1lower)
Tooling Cost --- 70% off
Price --- 30% off
Sample Submission 21+ 7 days 14 + 5 days
Daily Capacity 19k/day 18 k/day

Φ9 x 2.5mm

Φ19 x 3.5mm

Φ11 x 2.0mm

Process MIM HPM
Tooling Design 4 Cav. 1 Cav. (2upper 2lower)
Tooling Cost --- 65% off
Price --- 25% off
Sample Submission 21+ 7 days 14 + 5 days
Daily Capacity 9k/day 12 k/day

◆ HPM Materials

Materials Density(g/cm³) Tensile Strength(MPa) Yield Strength(MPa) Elongation(%) Hardness
17-4PH(As-Sintered) >7.5 900 700 6 HRC 25 ~ 30
17-4PH(Heat-Treated) >7.5 1,190 1,050 5 HRC 31 ~ 36
Fe8Ni(Heat-Treated) >7.5 1,750 1,450 5 HRC 47 ~ 53
4605(Heat-Treated) >7.5 1,655 1,480 2 HRC 46 ~ 52

◆ 17-4PH (Precipitation-hardening stainless steel)

Process Density(g/cm³) Tensile Strength(MPa) Elongation(%) Hardness
PM 17-4PH(As-sintered) 7.18 850 3.1 HRB 89
PM 17-4PH(Heat Treated) 7.18 1,130 1.5 HRB 97
HPM 17-4PH(As-sintered) 7.61 900 6.0 HRB 24

With much less porosities, the elongation and hardness of HPM parts are much improved than those of conventional PM counterparts.

◆ 4605 Modified (High strength alloy)

HPM tensile bar

4605Modified, 7.63g/cm³, Without quenching (sintered and tempered):HRC 50, 1,800MPa, 5% elongation

TPT’s own patent material

Apply to the gear of hand tool.

◆ 4605 High hardness/ elongaHon Alloy

  1. Achieve via material adjustment and heat treatment
  2. Hardness can be reached HV700 for surface, HV250 for core via carbonizaHon.

◆ HPM Parts

Production parts

HPM Tensile Bar

4605Modified, 7.63g/cm³, Without quenching (sintered and tempered):Production parts HRC 50, 1,800MPa, 5% elongation

◆ Applications

  • Hand tools (high torsion requirement)
  • Pneumatic tools and Locks (toughness requirement)
  • Automotives (high torsion requirement)
  • 3C Products (high strength, corrosion resistance,good cosmetic finishes)
  • Gear (high torsion requirement)
  • Others: medical, industrial.

◆ QC and RD Equipments

HORIBA
Oxygen Nitrogen Analyzer

HORIBA
Carbon Sulfur Analyzer

JEOL
Scanning Electron Microscope

表面粗糙儀

耐磨測試機

金屬成分分析儀

密度天平

OMM

Hardness tester

Hardness tester

Universal testing machine

◆ TPT’s HPM Facilities

Mechanical Press
40tons、100tons、30tons
12tons (April)

Mechanical Press 20tons
Dorst CNC Press 120tons