Quality Control

Ø Raw material : Choose One-Level ingot steel, inspect chemical element , confirm achieve requirements. According to the forging ratio, calculate forging weight. Cut raw material.

Ø Forging : After heating, fristly, Pre- forging to the required dimensions. Second, forging blanks.

Ø Rough machining: Machining about 2-3 mm, have machining allowance. Without oxide skin,crack. Insure full heat treatment 

Ø Heat treatment : According the requirements of Tensile,Yield, Hardness requirements, fully heating. Include A,N,Q,T.

Ø UT inspect . 100% qualitied.

Ø Precision machining : Equip horizontal lathe, vertical lathe, CNC lathe, CNC machining center, turning machine,boring machine, milling machine, grinder. Tolerance can hold +/-0.02mm, surface roughness can hole Ra0.8. Grindering geometric tolerance.

Ø Inspection : Inspect surface and dimensions. Every product have inspection report. Every product mad a test bar, used for test hardness and mechanical properties. All forgings 100% UT inspect. When finished a produce process, inspect. Every process has requiements and inspect report. Can retrospect every process.

Ø Packing: According to sea or air transport requirements.

If find any inconformities, tell our customers first, wait feedback. Not allow to handle or delivert privately.

We control every process's quality by ourselves, not have outsource. So quality is within our range. The advantages are stable quality, timely delivery and competitive cost.