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April 1-3, 2008

METALFORM
Birmingham, Alabama

Booth No. 0931

ISO 14001 Certified

TeikuroTRD is ISO certified. View our certificate online.

FAQs

Some frequently asked questions regarding TeikuroTRD process and services.

Benefits

Produce consistent quality parts – Significant cost reductions. Learn more...

Dimension Control

Teikuro TRD developed “State of the Art” dimension control data base and analysis program, which is also used for die history. Every single die, small or large, is measured by CMM and input data in to the program. Data is taken at every step of process, which will provide us valid number for analysis and conclusion. We always consult you based on the actual data base, not just experience.

Also Teikuro manage your die history from beginning to the end of die life. We keeps vast size of data base for you and help you to improve your die management.

In application of the high temperature coatings such as CVD and TRD for metal-forming tools, substrates are quench- hardened during cool down from the coating temperature and/or during the post hardening stage. The crystal phase transformation generated in such thermal cycles results in two types of distortion, dimensional change and deformation, as in ordinary hardening of steels. The first distortion is a change in dimensions resulting from changes in the micro-structures of the substrate materials. The latter is a change in shape, similar to bending in slender tools and “out-of-roundness” of cylindrical-shaped tools due to inhomogeneous micro-structures in the substrate materials and non- uniform heating and cooling during the coating process.

To learn more about this, read our article: Best substrate materials for tools with tight dimensional tolerances in application of the high temperature TRD coating

Factors that affect distortion in the application of high temperature coating processes on steel substrates:

Chemical Composition of steels
Microstructure of steels
Amount, Shape, Size, and distribution of carbide particles, Grain size of matrix phase
Size and Shape of articles to be coated
Diameter (D), Length (L), and Ratio of D/L, Thickness (T), Width (W), Length (L), and Ratio of T/W, T/L, T/L
Rolling Direction of steel
Coating condition and post heat treating condition
Temperature, time and cooling rate in tempering
Temperature, time and cooling rate in reheating hardening
Subzero treatment condition

How to get TRD coated tools with tight dimensional tolerance:

Select good type of substrate materials (to Minimize M, D )
Select premium quality materials (M, D )
Design tools under well consideration of finish grinding on non-working surface after the coating ( M, D )
Cut Out Tools from steel stocks in consideration of rolling direction ( M )
Rough machine under proper condition to minimize generation of residual stress ( D )
Heat treat ( Harden ) under precisely controlled condition ( M, D )
Do not apply any processing to correct deformation (D )
Finish grind under proper condition to minimize generation of residual stress ( D )
Apply coating under precisely controlled condition ( M, D )
Accumulate the data on movement and deformation and use them to the next chance ( M, D)

The most difficult problem in the application of TRD coating is dimensional control. Teikuro never applies TRD coating without preplanning to minimize the distortion problem. Teikuro selects the best TRD coating conditions for each application, utilizing their knowledge and experiences with distortion behavior of substrate materials.

To learn more about this, read our article: Necessary information of substrate materials and heat treatment if customers want to have TRD coated tools with tight dimensional control