Laser Transformation Hardening of Firing Zone Cutout Cams.

Lowry, Robert W.

Laser Transformation Hardening of Firing Zone Cutout Cams.

Active / Technical Report | Accession Number: ADA105498 |

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Abstract:

This manufacturing technology MT project developed techniques to use laser transformation hardening to replace cyanide salt bath nitriding to case harden firing zone cutout cams for the Mk 10 Guided Missile Launcher System GMLS. These cams, machined of 4340 steel, satisfactorily meet the manufacturing requirements of a case depth of 0.010-0.020 in. and a hardness of RC 55-67, with minimal distortion, after undergoing laser hardening. The laser transformation, utilizing a beam oscillator and numerical control stepping procedures to minimize heat buildup, produces a very fine martensitic structure that is hard, typically RC 62. This hardness is reduced somewhat in the beam overlap regions, but this factor is compensated for by cam preheat treatment and sufficient overlap of laser beam passes. The cost of laser hardening is estimated at less than 10 percent of the cost of cyanide nitriding. Author

Author(s):

Lowry, Robert W.

Author Organization(s):

NAVAL SEA SYSTEMS COMMAND WASHINGTON DC

Descriptive Note:

Final rept.,

Pagination:

0044

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:

Approved For Public Release

RECORD

Collection: TR

Identifying Numbers

Report Number(s):

NAVSEA-S555-79

Subject Terms

Joint Capability Areas:

JCA_5_Command and Control; JCA_5.3_Planning; JCA_1.2.1_Training; JCA_4_Logistics; JCA_5.3.3_Develop Strategy; JCA_5.3.4_Develop Courses of Action; JCA_5.3.5_Analyze Courses of Action; JCA_4.2_Supply; JCA_4.2.2_Inventory Management; JCA_4.6_Engineering

Modernization Areas:

Directed Energy

Communities of Interest:

Weapons Technologies

Descriptor(s):

*MANUFACTURING, *LASER BEAMS, *TRANSFORMATIONS, *RADIATION HARDENING, OSCILLATORS, REQUIREMENTS, FIRING TESTS(ORDNANCE), STEEL, REGIONS, MOLECULAR STRUCTURE, CAMS, NUMERICAL METHODS AND PROCEDURES, MARTENSITE

Field(s)/Group(s):

Lasers and Masers

Keyword(s):

Manufacturing technology, Zone cutout cams

Report Date:

1981 Jun 01