Internal Microstructure: Grain Size 50-150 μm, Porosity < 0.1%

Q: Why is internal microstructure critical in zinc alloy billets?

It determines mechanical strength, ductility, and corrosion resistance, affecting downstream processes like extrusion or rolling and final product performance.

Q: How is microstructure controlled during continuous casting?

Through precise control of cooling rates, alloy composition, and casting parameters to promote fine, equiaxed grains and minimize defects.

Component Specifications

Definition

The internal microstructure refers to the arrangement, size, distribution, and morphology of grains, phases, and defects within the zinc alloy billet, formed during continuous casting and solidification processes, which directly determines the billet's mechanical properties, corrosion resistance, and subsequent processing performance.

Working Principle

During continuous casting, molten high-purity zinc alloy solidifies under controlled cooling rates and thermal gradients, forming a specific microstructure through nucleation and grain growth. The process parameters (e.g., casting speed, cooling water flow, alloy composition) influence grain refinement, phase distribution, and defect minimization to achieve uniform and fine-grained structures.

Materials

High-purity zinc alloy (typically Zn ≥ 99.99% with controlled trace elements like Al, Cu, Mg for alloying), free from excessive impurities (Pb, Cd, Fe < 0.003%) to ensure microstructure integrity.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Porosity	< 0.1%
Grain Size	50-150 μm
Microhardness	40-60 HV
Defect Density	No cracks, shrinkage cavities, or inclusions exceeding 10 μm
Phase Distribution	Uniform α-Zn matrix with minimal intermetallic phases

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 6892-1, ASTM E112, DIN 50125

Parent Products

This component is used in the following industrial products

Industrial-Grade High-Purity Zinc Alloy Continuous Casting Billet

High-purity zinc alloy billet produced via continuous casting for industrial applications

View Product Details

Engineering Analysis

Risks & Mitigation

Grain coarsening leading to reduced strength
Micro-porosity causing failure under stress
Inhomogeneous phase distribution affecting corrosion resistance

FMEA Triads

Trigger: Insufficient cooling during solidification
Failure: Coarse grain structure reducing mechanical properties
Mitigation: Optimize cooling water flow and temperature control systems

Trigger: Impurity contamination in alloy melt
Failure: Formation of brittle intermetallic phases or inclusions
Mitigation: Implement strict raw material quality checks and melt filtration

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Not directly interchangeable; microstructure is process-specific to each billet

Compliance & Inspection

Tolerance

Grain size variation ≤ ±20%, porosity ≤ 0.15%, hardness within ±5 HV of spec

Test Method

Metallographic analysis per ASTM E3, SEM/EDS for phase identification, ultrasonic testing for defect detection

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Internal Microstructure

Manufacturer profiles associated with Internal Microstructure.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

Why is internal microstructure critical in zinc alloy billets?