Why Centrifuge Wear Parts Wore Too Fast: A North American Oil & Gas Case Study
Tungsten Carbide is widely used in decanter centrifuges because components in the feed zone, conveyor, and solids-discharge area can be exposed to continuous abrasive and erosive wear.
But simply specifying “tungsten carbide” does not guarantee satisfactory service life.
A North American customer in the oil and gas industry contacted Langsun Carbide after experiencing rapid wear and shorter-than-expected service life in its centrifuge wear parts.
The original components used YG6 and YG8 carbide grades. Although both are established cobalt-bonded cemented carbide grades, the customer's actual operating conditions demanded a different material balance.
Instead of simply reproducing the existing parts, Langsun asked the customer to send us the original OEM samples.
We analyzed the material, reviewed the existing carbide composition, reformulated the material system, and produced a new set of custom centrifuge wear-part samples for field evaluation.
After putting the new components into service, the customer reported significantly improved wear resistance and substantially longer service life compared with the previous parts.
The successful development ultimately led to a long-term supply relationship.
This case illustrates an important lesson:
When tungsten carbide wear parts fail prematurely, copying the original grade is not always the correct solution. The material must match the real wear mechanism.
Out of respect for our clients' privacy and confidentiality, this article will not include any information about our clients or related projects.
The Customer's Problem: Centrifuge Parts Were Wearing Too Quickly
The customer operates in the North American oil and gas sector and uses centrifuge equipment in a demanding solids-handling environment.
Its existing tungsten carbide wear components were produced using YG6 and YG8 grades.
The problem was straightforward:
● wear occurred faster than expected;
● replacement intervals were shorter than desired;
● service life did not meet the customer's expectations.
The initial question could easily have been:
“Can you manufacture the same YG6 or YG8 parts?”
But that would only reproduce the existing material specification.
The more useful question was:
Why were the existing Carbide Parts wearing too quickly in this particular centrifuge application?
That distinction became the starting point for the project.
Why Centrifuge Wear Parts Are Difficult Applications
A decanter centrifuge creates several different wear mechanisms inside one machine.
OEM technical literature confirms that abrasive solids can attack the conveyor flights, feed area and solids-discharge zones, which is why replaceable tungsten Carbide Tiles, liners and discharge components are commonly used in these locations.
But these areas do not all wear in the same way.
A simplified view is:
| Centrifuge Area | Typical Wear Mechanism |
| Feed zone | Particle acceleration and impact erosion |
| Conveyor / scroll flights | Continuous sliding abrasion |
| Solids discharge | High-velocity erosion and particle impact |
| Distribution zones | Localized erosion and turbulent flow |
That means two visually identical carbide parts can perform very differently if their material microstructure is not suited to the operating condition.
Why We Did Not Simply Copy the YG6 or YG8 Grade
YG6 and YG8 are widely recognized carbide grade designations and are used in many wear applications.
But a grade name alone does not tell the full performance story.
Wear behavior can also be affected by:
● WC grain structure
● binder content and distribution
● powder quality
● sintering condition
● final carbide microstructure
● hardness–toughness balance
● actual abrasive particles
● impact and erosion conditions
For this customer, simply duplicating “YG6” or “YG8” would not address the underlying problem.
The existing parts had already shown that their current material specification did not provide the desired wear life.
So instead of asking:
“Which of the two grades should we copy?”
we treated the failed service life as a material-selection problem.
Step 1: The Customer Sent the Original OEM Samples
For custom carbide wear parts, a physical OEM sample can provide information that a simple dimension list cannot.
The customer shipped the original centrifuge wear parts to Langsun for evaluation.
This gave us the opportunity to examine the existing component rather than relying only on a verbal description such as:
“YG8 centrifuge wear part.”
The sample served as the physical baseline for:
● geometry
● material evaluation
● manufacturing feasibility
● comparison with the redesigned sample
For custom centrifuge components, Langsun routinely works from customer drawings, samples and actual operating requirements rather than treating every wear part as a standard catalog item.
Step 2: We Analyzed the Original Carbide Material
The next step was not production.
It was material analysis.
The purpose was to understand the original carbide material well enough to determine whether reproducing it made sense.
For this case, Langsun analyzed the customer's OEM sample and used the findings as the basis for a revised material formulation.
This is a critical distinction in custom carbide development:
Reverse-engineering the geometry is only half of the job.
If the original component already suffers from inadequate wear life, reproducing the same material may simply reproduce the same failure.
The material must therefore be evaluated separately from the shape.
Step 3: We Reformulated the Carbide Material
Based on the original sample analysis and the customer's wear problem, Langsun reformulated the carbide material rather than simply supplying another batch of standard YG6 or YG8 components.
The objective was straightforward:
Improve resistance to the customer's actual wear conditions while maintaining the material properties required by the component.
This does not mean maximizing hardness at any cost.
For centrifuge wear parts, material selection can involve competing requirements:
higher wear resistance versus sufficient toughness and structural reliability
The optimum carbide therefore depends on how the component is actually being damaged.
Abrasive sliding, particle impingement and localized erosion do not necessarily favor exactly the same microstructure.
That is why Langsun's approach was to redesign the material around the application rather than select a grade name from a generic table.
Step 4: New Centrifuge Wear-Part Samples Were Manufactured
After determining the revised material formulation, Langsun manufactured new carbide samples corresponding to the customer's centrifuge components.
For custom wear parts, the development process can involve:
OEM sample
→ material analysis
→ material formulation
→ forming and sintering
→ precision finishing
→ inspection
→ customer field evaluation
This approach is consistent with Langsun's broader custom manufacturing process, where customer drawings, physical samples and operating requirements are used to develop repeatable carbide components rather than merely copy external dimensions.
Step 5: The Customer Tested the New Parts in the Actual Centrifuge
Laboratory material properties are important, but for a centrifuge wear component, the final question is:
How does the part perform in the actual machine?
The customer installed the newly developed Langsun samples in its equipment and evaluated them under real operating conditions.
According to the customer's field feedback, the redesigned carbide components delivered:
● significantly better wear resistance, and
● substantially longer service life
than the previous YG6/YG8 components.
The important result is that the customer's original rapid-wear problem was successfully addressed.
What This Case Taught Us About Centrifuge Wear Parts
1. A Familiar Grade Name Does Not Guarantee the Right Material
YG6 and YG8 are widely used carbide grades.
That does not mean either one is automatically suitable for every centrifuge.
The service environment must determine the material—not the familiarity of the grade name.
2. “Use a Harder Grade” Is Too Simple
Rapid wear often leads buyers to request higher hardness.
But centrifuge components can experience several mechanisms simultaneously:
● sliding abrasion
● erosion
● particle impact
● vibration
● localized edge loading
Increasing one material property without considering the full wear mechanism can create a different problem.
3. OEM Samples Can Be Extremely Valuable
When a drawing is unavailable or the existing material is unclear, the original component provides a useful starting point.
It can help establish:
● actual geometry
● material baseline
● wear condition
● manufacturing features
But an OEM sample should not automatically be copied without asking why the existing part failed.
4. Material Analysis Should Lead to a Decision
Material testing has little value if the only outcome is:
“The existing part is YG8, so manufacture YG8 again.”
For this project, the value of analysis was that it allowed Langsun to use the original part as a baseline and develop a different formulation intended to address the wear problem.
5. Field Validation Matters
Centrifuge wear is application-dependent.
Particle type, solids concentration, operating speed, feed characteristics and the location of the component can all influence wear.
Therefore, a new material formulation ultimately needs to prove itself under the customer's actual operating conditions.
The Real Lesson: Do Not Copy a Failing Material
This North American oil and gas project began with a simple problem:
The existing centrifuge wear parts were wearing too quickly.
The easy response would have been to reproduce another set of YG6 or YG8 components.
Instead, the customer sent Langsun the original OEM parts.
We:
analyzed the material
→ reformulated the carbide composition
→ manufactured new samples
→ allowed the customer to validate them in real service
The customer subsequently reported materially better wear performance and service life, and the successful project developed into a long-term business relationship.
For centrifuge operators and OEMs, the lesson is simple:
When a carbide wear part repeatedly fails to meet its target life, do not automatically reproduce the same grade. First determine whether the material is actually matched to the wear mechanism.
If your centrifuge wear parts are wearing too quickly, send Langsun Carbide the OEM sample, drawing, current material information and operating conditions for evaluation.
ABOUT THE AUTHOR
Allen Fu
International Marketing Director at NINGBO LANGSUN TUNGSTEN CARBIDE CO., LTD.
Allen Fu has over five years of experience in industrial wear parts and tungsten carbide applications. He works with customers across oil and gas, valve and flow control, metalworking, chemical processing, pumps, surface treatment, mining, and mineral processing.
His work focuses on helping OEMs, equipment manufacturers, engineering companies, and procurement teams evaluate tungsten carbide wear parts based on real operating conditions, material performance, manufacturing feasibility, and quality-control requirements.
Areas of focus: Tungsten carbide wear parts, valve components, mechanical seal rings, pump components, material selection, failure analysis, custom manufacturing, and quality control.