ISO 9001: 2008, BV, SGS High Frequency Quenching Girth Gear

With 30-year rich industry experience and knowledge, we have earned specialization in manufacturing and supplying superior quality large gears
These are fabricated in conformity with defined industry standards, the offered range is widely acknowledged by the customers for features like optimum performance and longer life
These precision engineered gears are widely demanded across varied industries
The high quality ring gear with module 45 we manufactured represents our strong fabrication ability

Advantages:
Products with customer designs
Strong machining and heat treatment abilities
Strict quality control
Prompt delivery
Experience in cooperation with fortune 500 companies
Process:
Forging/casting
Normalizing and tempering
Rough machining
Quenching and tempering
Finish machining
Teeth grinding
HFQ quenching/carburization
We can offer you in various process conditions
Solutions for many end markets and applications
Mining
Metallurgy
Power generation
Sugar
Cement plant
Port machinery
Oil and natural
Paper making
OEM gear case
General industries
Testing process:
QA documents: chemical composition report, mechanical properties report, UT report, heat treatment report, dimension check report
The data on chemical composition report and mechanical properties report are approved by third party, Luoyang Ship Material Research Institute, CSIC
UT test: 100% ultrasonic test
Heat treatment report: provide original copy of heat treatment curve/time table.


  Specifications of Gear :

No.	Item	Description
1	Diameter	≤15m
2	Module	≤45
3	Material	Cast Alloy Steel, Cast Carbon Steel, Forged Alloy Steel, Forged Carbon Steel
4	Structure From	Integrated, Half to Half, Four Pieces and More Pieces
5	Heat Treatment	Quenching & Tempering, Normalizing & Tempering, Carburizing & Quenching & Tempering
6	Tooth Form	Annular Gear, Outer Gear Ring
7	Standard	ISO, EN, DIN, AISI, ASTM, JIS, IS, GB

Inspection and Test Outline of Girth Gear:

No.	Item	Inspection Area	Acceptance Criteria	Inspection Stage	Certificates
1	Chemical Composition	Sample	Material Requirement	When Smelting After Heat Treatment	Chemical Composition Report
2	Mechanical Properties	Sample(Test Bar on the Gear Body)	Technical Requirement	After Heat Treatment	Mechanical Properties Report
3	Heat Treatment	Whole Body	Manufacturing Standard	During Heat Treatment	Heat Treatment Report Curves of Heat Treatment
4	Hardness Test	Tooth Surface, 3 Points Per 90°	Technical Requirement	After Heat Treatment	Hardness Teat Report
				After Semi Finish Machining
5	Dimension Inspection	Whole Body	Drawing	After Semi Finish Machining	Dimension Inspection Report
				Finish Machining
6	Magnetic Power Test (MT)	Tooth Surface	Agreed Standard	After Finish Gear Hobbing	MT  Report
7	UT	Spokes Parts	Agreed Standard	After Rough Machining	UT Report
				After Welded
				After Semi Finish Machining
8	PT	Defect Area	No Defect Indicated	After Digging After Welded	PT Record
9	Mark Inspection	Whole Body	Manufacturing Standard	Final Inspection	Pictures
10	Appearance Inspection	Whole Body	CIC's Requirement	Before Packing (Final Inspection)
11	Anti-rust Inspection	Whole Body	Agreed Anti-rust Agent	Before Packing	Pictures
12	Packing Inspection	Whole Body	Agreed Packing Form	During Packing	Pictures

Facilities For Manufacturing Gear ring:

No.	Item	Description
1	Smelting & Casting Capability	40t ,50t, 80t Series AC Electric Arc Furnace 2×150t, 60t LF Ladle Refining Furnace 150t, 60t Series VD/VOD Furnace 20×18m Large Pouring Facility We can pour 900t refining liquid steel one time, and achieve vacuum poured 600t steel ingots. We can produce the high quality steel of more than 260 steel grades as carbon steel,structural alloy steel and the structural steel, refractory steel and stainless steel of special requirement. The maximum weight of casting steel, gray casting, graphite cast iron and non-ferrous casting is 600t, 200t, 150t and 20t separately.
2	Forging Capability	The only one in the word, the most technologically advanced and the largest specification18500t Oil Press, equipped with 750t.m forging operation machine 8400t Water Press 3150t Water Press 600t Water Press Φ5m High Precision Ring Mill ( WAGNER,Germany) Φ12m High Precision Ring Mill We can roll rings of different sections of carbon steel, alloy steel, high temperature alloy steel and non-ferrous alloys such as copper alloy, aluminum alloy and titanium alloy. Max. Diameter of rolled ring will be 12m.
3	Heat Treatment Capability	9×9×15m,8×8×12m,6×6×15m,15×16×6.5m,16×20×6m ,7×7×17m Series Heat Furnace and Heat Treatment Furnaces φ2.0×30m,φ3.0×5.0m Series Heat Treatment Furnaces φ5.0×2.5m,φ3.2×1.5m,φ3.0×5.0m,φ2.0×5m Series Carburizing Furnaces & Nitriding Furnaces & Quenching Bathes φ2.0×30m Well Type CNC Electrical Furnaces Φ3.0×5.0M Horizontal Gas Temperature-differential Furnace Double-frequency and Double-position Quenching Lathe of Pinion Shaft
4	Machining Capability	1. ≥5m CNC Heavy Duty Vertical Lathes 12m CNC Double-column Vertical Lathe 10m CNC Double-column Vertical Lathe 10m CNC Single-column Vertical Lathe 6.3m Heavy Duty Vertical Lathe 5m CNC Heavy Duty Vertical Lathe
		2. ≥5m Vertical Gear Hobbing Machines 15m CNC Vertical Gear Hobbing Machine 10m Gear Hobbing Machine 8m Gear Hobbing Machine 5m Gear Hobbing Machine 3m Gear Hobbing Machining
		3. Imported High-precision Gear Grinding Machines 0.8m~3.5m CNC Molding Gear Grinding Machines
		4. Large Boring & Milling Machines 220 CNC Floor-mounted Boring & Milling Machine 200 CNC Floor-mounted Boring & Milling Machine 160 CNC Floor-mounted Boring & Milling Machine

Testing Process:
· QA DOC: Chemical Composition Report, Mechanical Properties Report, UT Report, Heat Treatment Report, Dimensions Check Report
· The data on chemical composition report and mechanical properties report are approved by third party, Luoyang Ship Material Research Institute, CSIC.
· UT test: 100% ultrasonic test according to EN10228-3, SA388, Sep 1921 C/c etc.
· Heat Treatment Report: provide original copy of heat treatment curve/time table.