Transcript Prolong – Practical Analysis Theory

REDUCE SOLDER
RESIST HEAT CHECK
MINIMIZE WASHOUT
Prolong Tool - 121 Official Drive - Addison IL 60101
WHAT IS SOLVENITE -TD
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Thermal Diffusion Surface Transformation
• Not a coating
• General treatment class would be called nitrocarburizing
• It is much more than simple nitrocarburizing
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Increases microhardness hardness over an extended diffusion
gradient. (No sharp transitions as with typical nitrocarburizing)
Not limited by line of site
No dimensional change
Non susceptible to brittle fracture, flaking or spalling
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SOLVENITE-TD IS A HIGHLY CONSISTENT AND
REPEATABLE PROCESSING OPERATION
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Provides reliable results consistently over time
Low process temperature (below 1000o F)
Maintains surface finishes
Weldability (unlike typical coatings and diffusion processes)
Can be applied to new or used tooling (can be reapplied)
THERE ARE APPROX. 32 TYPES OF NITRIDING
AVAILABLE FOR H13 STEEL
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Nitriding forms a uniform layer of ferric nitride in the H13 surface
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Nitriding relies on a perfect system, which is not possible to
maintain, so fails quickly when imperfections arise.
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There are many factors that lead to failure in the nitrided surfaces.
• Uneven surface coating depth
• Surface roughness from nitride growth
• Formation of e – Fe3N as well as g – Fe4N leading to brittleness
• Resistant to stress in only one way, forming nitrides
SOLVENITE-TD IS DIFFERENT FROM NITRIDING AND
TRADITIONAL NITROCARBURIZING
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SOLVENIT- TD instills a highly complex chemistry to the surface
of the H13 die.
The complexity of dispersions in this surface allows it to resist
many types of stresses.
The complexity “averages out” surface imperfections, so stresses do
not accumulate into fault zones.- (resisting heat check)
The complexity interrupts the chemical reaction of aluminum with
iron. -(reducing solder)
The complexity presents a variety of chemical reactants to the
microscopic solders if they do occur, interrupting their crystalline
growth, and limiting their affects.
STRESS CRACKING
Result of differences in coefficient of expansion and tensile
strengths of varying materials when heated and cooled rapidly
leading to the accumulation of stress in point defects in the
material.
Surface Layer Types
Dispersion Sizes
typ
Surface
Coated
Solvenite
Transformed
Traditional
Poor
Dispersions
Solvenite
Good
Dispersions
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SOLVENITE-TD treated H13
depth profile.
Smooth and continuous
gradients (no sharp transitions)
Minimal pure surface
compound zone
No dimensional distortion or
surface roughening
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Pull Testing
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Each pure crystal, matrix, dispersion has a unique
individual theoretical yield and tensile strength.
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Measured tensile and yield strength values are an average
of the individual chemistries, dispersions, layers, and
interrelationships between them.
Untreated
Solvenite TD
Treated
Increasing the tensile
strength increases the
total amount of force
needed to break the
steel.
Decreasing the yield
strength decreases the
brittleness of the steel.
Together these factors
increase the steel
toughness.
Untreated
Solvenite-TD
Treated
SOLVENITE-TD OFFERS UNIQUE ADVANTAGES
Reduced Heat Checking
Added toughness by increased plasticity and tensile strength
Smooth hardness gradient
Resists Soldering
Chemistry prevents free iron reaction with aluminum
Complexity of chemistry prevents growth of iron aluminum
compounds
Minimized Erosion
Wear resistance to high velocity abrasive particles