Steel Solidification
What Is Segregation?
SEG
Uneven Solute Distribution
Segregation Happens During Solidification
Segregation occurs when solute elements concentrate unevenly as molten steel solidifies. Two primary types affect cast components: microsegregation and macrosegregation.
01
Grain-Scale Variation
Microsegregation
Elemental variation at the grain scale, forming between dendrite arms during rapid cooling.
02
Casting-Scale Gradient
Macrosegregation
Large-scale compositional gradients driven by fluid flow and solidification shrinkage across the casting.
Segregation Prediction
Why Prediction Matters
PRE
Predict Before Failure
Early Segregation Prediction Protects Quality and Cost
Predicting segregation early helps foundries avoid mechanical failures, reduce rejection costs, and optimize alloy composition, pouring temperature, and cooling strategies before defects become expensive.
01
Performance Risk
Mechanical Failure Risk
Segregated zones exhibit reduced toughness, hardness variation, and susceptibility to cracking under load.
02
Cost Exposure
Quality Rejection Costs
Undetected segregation leads to costly post-production failures, rework, and customer returns.
03
Proactive Control
Process Optimization
Early prediction enables foundries to adjust alloy composition, pouring temperature, and cooling rates proactively.
Segregation Control
Key Drivers of Segregation
SEG
Metallurgy + Process Variables
Segregation Severity Depends on Multiple Interacting Drivers
Segregation severity is governed by a combination of metallurgical and process variables. Understanding these drivers is the first step toward simulation-based control.
C+Mn
Most Influential Elements
Carbon & Manganese
Carbon and manganese are the most influential elements — even small compositional shifts significantly alter segregation patterns.
01
Process Driver
Cooling Rate
Faster or uneven cooling changes dendrite spacing and intensifies local compositional variation.
02
Thermal Driver
Thermal Gradient
Strong temperature gradients influence solidification fronts and solute redistribution.
03
Flow Driver
Fluid Flow
Melt movement transports solute-rich liquid and can create large-scale composition gradients.
04
Geometry Driver
Casting Geometry
Section thickness, feeding paths, and shrinkage zones influence where segregation concentrates.
Segregation Prediction
Simulation-Based Prediction
SIM
Predict Before Pouring
Simulation Converts Foundry Physics into Risk Intelligence
Advanced casting simulation software models heat transfer, fluid dynamics, and solute redistribution simultaneously to predict segregation before physical production begins.
01
Heat Transfer Model
Thermal Modeling
Predicts cooling behavior, solidification fronts, thermal gradients, and hot spot formation.
02
Solute Movement
Solute Transport
Tracks how alloying elements redistribute through liquid flow, mushy zones, and solidification shrinkage.
03
Risk Visualization
Segregation Mapping
Generates accurate segregation risk maps, highlighting critical regions before a single pour is made.
DATA
Design-Stage Decision Support
Data-Driven Decisions Before Production
This empowers foundry engineers to make data-driven decisions at the design stage — adjusting alloy chemistry, pouring strategy, thermal control, and geometry before physical trials.
Segregation Control Methodology
PoligonCast's Approach
PC
Integrated Digital Solutions
Advanced Simulation Combined with Foundry Engineering Expertise
PoligonCast combines advanced simulation tools with deep foundry engineering expertise to predict and mitigate segregation across complex geometries.
Three-Step Simulation Workflow
Model, Optimize, Validate
01
Geometry + Alloy Specific
Component-Specific Modeling
Tailored simulations for each casting geometry and alloy grade.
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02
Iterative Simulation Control
Process Parameter Optimization
Iterative analysis of gating, risering, and cooling strategies.
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03
Physical Benchmarking
Validated Results
Simulation outputs benchmarked against physical inspection data.
Segregation Prediction
Engineering Quality from the Start
QLT
Design-Stage Quality Control
Predict Segregation Before It Becomes a Production Problem
Predicting segregation is no longer a post-production concern — it is a design-stage imperative. With simulation-driven insights, foundries can deliver cast steel components that meet the most demanding mechanical and structural requirements.
PC
PoligonCast Partnership
Eliminate Defects Before They Form
PoligonCast partners with manufacturers to eliminate defects before they form — turning simulation intelligence into casting excellence.
SIM
Casting Simulation
Predict segregation and defect risks at the design stage.
ENG
Foundry Engineering
Translate simulation insight into practical process decisions.
DIG
Digital Manufacturing
Connect design-stage intelligence to production excellence.
Q+
Casting Excellence
Quality Built into the Casting Before Production Begins
By moving segregation prediction into the design stage, manufacturers can reduce uncertainty, improve reliability, and deliver cast steel components with greater structural confidence.
