Evaluation of electroslag casting

Mitchell, A.; Bala, Sathish Rao; Ballantyne, As; Sidla, G.

doi:10.1179/030716981803275398

Cited by 5 publications

(2 citation statements)

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“…s u l f u r content can improve g r e a t l y the f r a c t u r e toughness o f a l l o y steels (Figure 31) [24). I t i s l i k e l y t h a t higher s u l f u r content i s lowering the toughness o f the CBS 600M steels.…”

Section: Steels It I S W E L L Known T H a T S U L F U R Content Andmentioning

confidence: 99%

Elevated Temperature Fracture Toughness and Fatigue Testing of Steels for Geothermal Applications

Cutler¹,

Goodman²,

Hendrickson³

1981

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Conventional d r i 11 b i t steels e x h i b i t i ncreased wear and decreased tough-ness when run a t elevated temperatures i n geothermal wells. B i t s are theref o r e run a t lower speeds and l i g h t e r loads, r e s u l t i n g i n lower penetration rates f o r geothermal d r i l l i n g than f o r conventional rock d r i l l ing. &Carpenter EX-00053, Timken CBS 600, Timken CBS lOOOM and Vasco X-2M steels w i t h improved hot hardness (improved wear resistance), were tested i n conjunction w i t h the steels used f o r cones ( A I S I 4820, 9315 and EX55) and lugs ( A I S I 8620, 9315 and EX55) i n conventional r o l l e r cone rock b i t s . Short-rod f r a c t u r e toughness measurements were made on each o f these steels between room temperature and 400OC. Fatigue crack resistance was determined a t 3OOOC f o r high-temperature steels and a t room temperature f o r conventional steels.Scanning electron microscopy analyses o f the fractured short-rod specimens were correlated with observed crack behavior from the t e s t records. Test recommended t h a t EX-00053 and CBS lOOOM be manufactured f o r geothermal d r i ll i n g a t the Geysers s i t e .

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Section: Steels It I S W E L L Known T H a T S U L F U R Content Andmentioning

confidence: 99%

Elevated Temperature Fracture Toughness and Fatigue Testing of Steels for Geothermal Applications

Cutler¹,

Goodman²,

Hendrickson³

1981

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“…This technology is now being used, not only for the production of high quality ingots, but also for obtaining large scale castings of complex shape. 13) The residual problems that are still sometimes encountered with ESR systems include " freckle " formation due to interdendritic fiow,14) blowhole formation and a slightly higher hydrogen content of the ingot near the bottom area. 15…”

Section: Introductionmentioning

confidence: 99%