Will your wear-resistant balls shatter under the high-impact conditions of large semi-autogenous (SAG) mills?

No, they won't. Through precise alloy composition and graded quenching, we impart high impact toughness to the product, specifically engineering it to resist breakage.

What are the specific advantages of permanent mold casting over sand casting?

It produces a finer, denser grain structure with virtually no porosity or shrinkage cavities; consequently, wear resistance improves significantly—by 20–30%—at the same hardness level.

How do you ensure consistent hardness across the entire batch of products?

We utilize fully automated, multi-stage heat treatment furnaces with precise temperature control, keeping hardness fluctuations within a stable range of ±1 HRC.

Can you test the hardness and microstructure of the liner's core?

Yes. We section samples and use Rockwell hardness testers and metallographic microscopes to analyze the core's hardness and microstructure, respectively.

Can the carbide morphology in high-chromium cast balls be controlled?

Yes. By optimizing the alloy composition and heat treatment profiles, we effectively ensure that the carbides are distributed in an ideal, finely dispersed state.

Home / Custom Services / Technology & Quality

Advanced Melting Equipment

– Precision Alloy Control

We utilize state-of-the-art medium-frequency induction melting equipment featuring electromagnetic stirring to ensure the uniform distribution of alloying elements.

Combined with a high-precision automatic batching system that accurately controls raw material ratios per heat, we strictly limit deviations in alloying elements to within ±0.05%.

This ensures consistent chemical composition across every heat, laying a solid foundation for uniform performance in subsequent processing.

Metal Mold Casting Vs Sand Mold

– Why It Matters

We are committed to using the metal mold casting process for our entire product line.

Microstructure

Metal molds facilitate faster cooling, resulting in a finer, denser grain structure.

Internal Defects

Metal mold castings exhibit minimal porosity or shrinkage cavities and possess high density.

Wear Resistance

Under identical operating conditions, wear resistance is improved by 20–30%.

Surface Finish

Castings produced via metal molds feature significantly smoother surfaces and superior dimensional accuracy.

Fully Automated Heat Treatment Line

– Uniform Hardness Every Batch

Advantages

Elimination of internal stress:

Multiple stress-relief processes thoroughly eliminate the risk of cracking.

Uniform hardness:

Hardness variation between the surface and core of the entire batch is strictly controlled within ±1 HRC.

Balanced toughness:

Precise microstructural control achieves excellent impact toughness alongside high hardness.

Process Description

Staged Preheating: Multi-stage progressive heating effectively prevents cracking risks caused by rapid heating.

02. High-Temperature Austenitization: Precise control of holding temperature and duration ensures full solid solution of alloying elements.

03. Step Quenching: Controlled cooling rates yield the desired martensitic microstructure while preventing quench cracks.

04. Cyclic Tempering: Repeated stress-relief tempering cycles thoroughly eliminate internal microstructural stresses.

German Inspection Equipment

– Traceable Quality Assurance

Spectrometer

Rapidly and accurately detects chemical composition to ensure the correctness of alloy formulations.

Metallurgical Microscope

Clearly observes microstructures—such as martensite and bainite—to evaluate the effectiveness of heat treatment.

Rockwell Hardness Tester

Measures surface and core hardness at multiple points to verify hardness uniformity.

Impact Testing Machine

Tests impact toughness at ambient or low temperatures to ensure resistance to fracture.

A traceable inspection report containing the above data is issued for every batch of products.

Quality Management System

– ISO9001 Certified

We strictly adhere to the ISO 9001 quality management system, implementing comprehensive control throughout the entire process—from the receipt of raw materials to the dispatch of finished products. Product performance fully meets and exceeds the requirements of standards such as GB/T 17445-2009.

Metal Mold Casting Vs Sand Mold

– Why It Matters

Raw Material Control

Comprehensive incoming inspection using spectroscopy to ensure precise chemical composition and ratios.

Melting Process Checks

Rapid sampling and analysis during melting to enable real-time adjustment of elemental content.

Casting Visual Inspection

Individual visual inspection of castings to reject parts with surface defects.

Heat Treatment Verification

Rigorous hardness sampling for each batch; only compliant parts proceed to the next stage.

Finished Product Inspection

Comprehensive final inspection covering dimensions, hardness, and impact toughness.

Packaging Verification

Final check of specifications, markings, and reports before shipment to ensure zero shipping errors.

Why Jinqiao Products Deliver Consistent Performance

Permanent Mold Casting: Utilizing a rapid-cooling permanent mold process, the castings undergo extremely fast cooling, resulting in a fine, dense grain structure that inherently provides superior wear resistance.

Multi-Stage Heat Treatment: Fully automated, multi-stage heating and graded quenching ensure uniform hardness across the entire batch and completely eliminate internal structural stresses, thereby preventing the risk of future cracking.

German-Standard Inspection: Equipped with high-end instruments—such as German-imported spectrometers and metallographic microscopes—we provide detailed data for every batch, ensuring quality is transparent and fully traceable.

Technology-&-Quality4-Why Jinqiao Products Deliver Consistent Performance

Technology-&-Quality5-Why Jinqiao Products Deliver Consistent Performance

Systematic Quality Assurance: Strict adherence to the ISO9001 quality management system ensures that every step—from raw material intake to finished product dispatch—is standardized, monitored, and documented.

Proven Expertise: With years of deep experience in the wear-resistant sector and a track record of manufacturing over a hundred product specifications, we offer mature, tailored solutions for diverse applications, including dry grinding, wet grinding, and high-temperature or high-impact environments.

Extensive field use by numerous mining and cement plant clients under continuous, heavy-load operating conditions has validated the products' exceptional stability and durability.

Download Technical Resources

Name	Size	Downloads	Update	Copy Link	Download
Product Quality Certificate Album.ppt	1.01MB	6	2026-06-28	Copy Link https://www.jinqiaocasting.com/phoenix/admin/download?fileId=hZKpMmfWiYsS&dp=GvUApKfKKUAU	Download
Company Product Catalogue.ppt	3.40MB	2	2026-06-28	Copy Link https://www.jinqiaocasting.com/phoenix/admin/download?fileId=kdpfhHACDsMS&dp=GvUApKfKKUAU	Download

Quick Answers

– Technology & Quality

Q Will your wear-resistant balls shatter under the high-impact conditions of large semi-autogenous (SAG) mills?

A No, they won't. Through precise alloy composition and graded quenching, we impart high impact toughness to the product, specifically engineering it to resist breakage.
Q What are the specific advantages of permanent mold casting over sand casting?

A It produces a finer, denser grain structure with virtually no porosity or shrinkage cavities; consequently, wear resistance improves significantly—by 20–30%—at the same hardness level.
Q How do you ensure consistent hardness across the entire batch of products?

A We utilize fully automated, multi-stage heat treatment furnaces with precise temperature control, keeping hardness fluctuations within a stable range of ±1 HRC.
Q Can you test the hardness and microstructure of the liner's core?

A Yes. We section samples and use Rockwell hardness testers and metallographic microscopes to analyze the core's hardness and microstructure, respectively.
Q Can the carbide morphology in high-chromium cast balls be controlled?

A Yes. By optimizing the alloy composition and heat treatment profiles, we effectively ensure that the carbides are distributed in an ideal, finely dispersed state.

View All FAQs

Advanced Melting Equipment

Metal Mold Casting Vs Sand Mold

Fully Automated Heat Treatment Line

Advantages

Process Description

German Inspection Equipment

Spectrometer

Metallurgical Microscope

Rockwell Hardness Tester

Impact Testing Machine

Quality Management System

Metal Mold Casting Vs Sand Mold

Why Jinqiao Products Deliver Consistent Performance

Download Technical Resources

Quick Answers

Q Will your wear-resistant balls shatter under the high-impact conditions of large semi-autogenous (SAG) mills?

Q What are the specific advantages of permanent mold casting over sand casting?

Q How do you ensure consistent hardness across the entire batch of products?

Q Can you test the hardness and microstructure of the liner's core?

Q Can the carbide morphology in high-chromium cast balls be controlled?

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