Spheroidizing
Lamellar pearlite turned into spheroidised carbides: lower hardness, better machinability and cold formability for heading, drawing and finishing.
Linqing, Shandong · Since 2006
Precision
is round.
From ⌀0.5 mm to ⌀120 mm. Bearing steel balls, ceramic balls and stainless steel balls — plus bearing steel wire and annealing. One factory, one set of inspection standards.
GCr15 bearing steel
G10 / G16
Si₃N₄ · ZrO₂
304 / 316 / 440C
Spheroidizing annealing
National High-Tech Enterprise
ISO 9001:2015 certified
Utility model patent CN 222002927 U
2006
Founded in Linqing
20yrs
Focused on steel balls
4lines
Balls, wire and annealing
⌀0.5–120mm
Standard size range
Products
Four product lines.
One chain of precision.
Same steel, same grinding and sorting, same inspection room. Whatever the specification, we try to keep it under one roof.
Bearing steel balls
GCr15 · G10 / G16
High-carbon chromium bearing steel, HRC 60–66. Roundness, roughness and hardness controlled batch by batch.
Learn more ›
Ceramic balls
Si₃N₄ · ZrO₂
About 40% the density of steel. Insulating, non-magnetic, resistant to heat and corrosion.
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Stainless steel balls
304 · 316 · 440C
From corrosion-resistant 304/316L to hardenable 420/440C — rust resistance and load capacity.
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Wire & annealing
Bearing steel wire
GCr15 wire rod supplied with spheroidizing, soft annealing and stress relief — ready to run.
Learn more ›
Process & quality
Precision
can be measured.
The quality of a ball comes down to a few numbers: diameter, spherical error, surface roughness, hardness and microstructure. We make measuring them a fixed step before shipment — not a matter of luck.
- Size & gradingAutomatic sorting into micron-level tolerance bands, so one batch behaves the same on your line.
- Spherical errorChecked on a roundness gauge — spherical deviation and diameter variation held in range.
- Surface roughnessRoughness gauge on Ra; grinding and superfinishing controlled as separate steps, which keeps running noise down.
- Hardness & structureRockwell hardness sampled per batch; metallography for decarburisation and spheroidised structure.
- Cracks & appearanceFlaw detection plus visual inspection — cracks, dents and rust rejected before packing.
Process
Eight steps,
one ball.
From wire rod to finished ball, every process parameter stays in the batch record. So when something goes wrong, we can trace which step it came from.
01
Spheroidizing
Softens the wire for cold heading
02
Cold heading
Mould-formed, consistent blanks
03
Hardening
HRC 60–66, uniform through the batch
04
Rough grinding
Removes stock, leaves finishing allowance
05
Fine grinding
Diameter and spherical error
06
Superfinishing
Lower Ra, longer life, quieter running
07
Grading
Sorted into micron-level bands
08
Inspection
Hardness, metallurgy, crack test, packing
Wire & heat treatment
Buy the wire.
Get the annealing done.
Spheroidising decides how well the wire cold-heads, machines and grinds. Selling wire and annealing it happen in one plant — one less handover, one less argument about whose fault it was.
Soft annealing
Further hardness reduction and stress relief for deep drawing and cold extrusion, with less cracking and less spring-back.
Stress relief
For residual stress left by machining and drawing. Stabilises dimensions and reduces distortion in later heat treatment or in service.
Applications
Where failure is not an option.
A failed ball often means a stopped line. We would rather spend the effort before it leaves the factory.
- Automotive
- Electric motors
- Home appliances
- Precision instruments
- Medical devices
- Chemical pumps & valves
- Wind power
- Machine tool spindles
- Power tools
- Food machinery
- Semiconductor equipment
About Aohengsai
Twenty years.
Only round.
Founded in 2006 on the South Ring Road of Yandian, Linqing, Shandong. In twenty years the range grew from bearing steel balls to ceramic balls, stainless steel balls, and bearing steel wire with annealing.
In 2024 our in-house "new-type steel ball fine-grinding device" was granted a Chinese utility model patent (CN 222002927 U) — steadier grinding, less manual adjustment, more consistent output.
Certifications
Certificates you
can verify.
Certificate numbers and validity dates are published here, so a customer or an auditor can check them against the issuing authority's register.
National High-Tech Enterprise
Issued jointly by the Shandong Provincial Department of Science and Technology, the Provincial Department of Finance and the Provincial Tax Service.
Certificate No. GR202437006768 · issued 2024-12-07 · valid 3 years
ISO 9001:2015 Quality Management
Certified to GB/T 19001-2016 idt ISO 9001:2015, scope: production of steel balls. Certifying body: Zhongheng Zhuoyue Certification (Beijing) Co., Ltd.
Certificate No. 128224Q0411R0S · valid until 2027-12-17Send a drawing, or a size.
Material, size, grade, quantity — even one line is enough for a workable quote and a realistic lead time.