DCMX Steel – Unmatched Strength for Mold & Die Applications

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DCMX

A revolutionary, patent pending, Cold Work Die Steel that outperforms all other Matrix type steels.

Features

DCMX is a matrix-type cold work tool steel: only fine carbides are distributed in matrix due to optimum alloy design and production process.

DCMX shows high performance in service and ease in mold making as well.

Physical Properties

Die Performance

High hardness such as 62 HRC is available by high temperature tempering with good dimensional stability, resulting in high wear resistance.

High toughness helps to prevent cracking and chipping.

Ease in Die Making

Isotropic dimensional change works easy geometry control in heat treating.

Machinability is improved by free machining additives and finely dispersed carbides.

Physical Properties

Comparison of properties among Daido cold work die steels

Heat Treatment

Forging Temperature (°C)	Treating Temperature (°C)				Hardness
Forging Temperature (°C)	Annealing	Quenching	Tempering	Stabilizing Treatment	Annealed	Quenched & Tempered
900-1160	920-980 Slow Cooling	1000-1050 Air Cooling	Low: 150-200 High: 480-560 Air Cooling More than twice	400°C for longer than 1 h	≤235HB	56~62HRC

Optical Micrographs (Annealed)

DCMX shows fine microstructure almost free from coarse carbides:

Tempering Hardness

Dimensional Stability

Toughness

Fatigue Properties

Machinability (Annealed)

Wear Resistance (Ohkoshi-test)

TD Coating

TD coating: By courtesy of DOWA Thermo Engineering.

CCT Diagrams

Main Applications

Punches, dies and working tools for cold pressing and cold forging, especially for:

Cold stamping dies for high strength steels
- Where galling and peel off of coated layer, TD and CVD, are main failure modes
Insert blocks for composite stamping dies
- Where good dimensional stability is required in dies alignment
Blanking punches and trimming edges
- Where main failures are cracking and chipping