ML20100R118

Intervenor Exhibit I-48,consisting of Re Technology for Fillet Cold Rolling of R-5 Type Crankshafts

ML20100R118
Person / Time
Site:	Shoreham File:Long Island Lighting Company icon.png
Issue date:	10/01/1984
From:	Denoh S KOBE STEEL, LTD.
To:	Beshouri G TRANSAMERICA DELAVAL, INC.
References
OL-I-048, OL-I-48, NUDOCS 8412170318
Download: ML20100R118 (4)

Text

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   .                                                 TELE %. 3453 293 E0Dett. J 17 February 1984 s       W   j/s g5 Mr. Gregory M. Beshouri                                       ;f Research & Development Enoineer                            / </              M           <

Engine and Compresscr Division (? r -' Transamerica Delaval Inc. 550 85th Avenue O a'}> b73 Oakland, California 94621 J / U.S.A. b /,\ M cP &c ,s[v i\ bl% ._ N g#

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Dear Mr. Beshouri

 -                 It was my great pleasure to have your letter of December 21, 1983 on our crankshafts with fillet cold rolling.

First of all, I would like to stress that our fillet cold rolling technology will be very promising way for the cost reduction of your RS-type crankshafts. However, I also have to confess that at this moment Kobe Steel does not produce solid crankshafts with fillet cold rolling. The reason is that the fillet cold rolling technology for solid crankshafts was developed more than ten years ago simultaneously with that for shrink fitting crankshafts. As the latter was applied to cast steel crankshaft, the technology got many interests of engine builders from the first stage and we have already delivered numerous shrink fit cast steel crankshafts with. fillet cold rolling. On the other hand, requirements to solid crankshafts were not so severe that the fillet cold rolling technology for solid crankshafts could not have any actual demand of engine builders and was not extended to actual production. Consequently , we have enough data to get approval of ship classification societies on the improvement of fatigue strength of forged solid crankshafts,

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0 STEEL. CA5TINC 4 FORCING DIYt5 tun KOBE L CO is ne imrui..us ir d ..it f...d .H KOBE S TE E L*s er d.<i.

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                                                                                      <> noms STEEL LTD., TAKASAGO PLANT but have not a fillet cold rolling machine for the actual production.

1 I recieved similar questions with yours from some of our

clients last year and we have decided to restart the develop-ment of fillet cold rolling machine for solid crankshafts.

It probably requires about one year for the development. However, if your demand for this technology is very high, the time schedule will be rearranged. I As for the fatigue strenath, a carbon steel crankshaft with fillet cold rolling (base metal tensile strength 7'B=60kg/mm2) is higher than a heat treated low2alloy steel crankshaft with the tensile strength of 70kg/mm . And the > cost is estimated to be between those of non-treated carbon l steel and low alloy steel crankshafts. l ) 1 9 I estimate that shot peening on this size of crankshafts l g j gj is a waste of time. Because, the hardened depth by shot j , peening is estimated to be quite shallow comparing with the j c.j. depth of highly stressed area at fillets. , 1 l

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The copies of Nippon Kaiji Kyokai Rule " Rules and Detailed Rules for Diesel Engine Crankshafts and Those Explanations" f l and the latest IACS's draft " Rules for the Calculation of 2

!                                 Crankshafts for Diesel Engines" will be sent by a separate mail.                                       j i                                              As we do not have NKK's rule book " Rules for the Survey i 02ntetemhet                     and Construction qf Steel Ships", I recommend you to contact Enid B**n- .. $                with NKK's New York office. The address is:

Nippon Kaiji Kyokai

ya,c4, eto- 445'~3 M f j 17 Battery Place, Room No.210, I lF we rNs G svt.au. New York, N.Y. 10004 l 1; OK31]imA- __

Please note that the IACS's draf t mentioned above was ! editted bacing on CIMAC proposal " Rules on Calculation of ' i 1 1 me

                                                                                                                      +BeOSE STEEL.LTD.. TAKASAGO PLANT Crankshafts for Diesel Engines (4. Draft)" and is still under discussion among IACC members and between CIMAC and IACS.

If you are interested in the detailed discussions on this matter, I recommend you to CCntact with Dr. Gunter Donath who is the chairman of CIMAC Sub Group " Crankshaft Dimentions". His address is MASHINENFABRIC AUGSBURG-NUERNBEF.G AG .e t -l 2 Abt. MEM D-8900 Augsburg 1 Stadtbachstr. 1 Postfach 10 00 80 West Germany Tel. (0821)322-3711 Telex 537960-533154 TCv Cordially, b

                                                                                    $hinpei Dench Senior Researcher Technical Department Steel Casting and Forging Division 3
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