Production technology for engine cylinder cover bolt
A technology of engine cylinder head and production process, which is applied in the production field of bolts, can solve problems such as fracture, and achieve the effects of high creep strength and durable strength, reduced probability of fracture, and high static strength
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[0028] A production process for engine cylinder head bolts, comprising:
[0029] (1) cold forming;
[0030] (2) Chamfering, optional cleaning after chamfering;
[0031] (3) Heat treatment, quenching at 860±5°C, tempering at 480±5°C for 110-130 minutes;
[0032] (4) Straighter;
[0033] (5) Grinding screw blank;
[0034] (6) rolling thread;
[0035] (7) Flaw detection after cleaning;
[0036] (8) surface phosphating;
[0037] (9) Dehydrogenation, the hydrogen content in the control material is less than 0.5ppm;
[0038] (10) Coating.
[0039] The material of the engine cylinder head bolts is SCM435 steel.
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Abstract
Description
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Application Information
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