Practical aspects of structural tests of titanium Robert

Practical aspects of structural tests of titanium. Robert BAŃSKI Politechnika Opolska steel bonds made by explosive cladding and exposed to process thermal loads Maria SOZAŃSKA Zygmunt SZULC, Aleksander GAŁKA Politechnika Śląska xplomet Zakład Technologii Wysokoenergetycznych „EXPLOMET” Gałka, Szulc, Sp. j. -1 -

Subject about which we will not talking About cladding elements to process apparatus About cladding for electrotechnic, electrometallurgy and electrochemistry About cladding bars, tubes and others… elementów. . -2 -

Subject about which we will not talking About conductive rails for electrolysers of chlorine About Electrical Transition Joints (ETJ) ETJ – Electric Transition Joints About Structural Transition Joints (STJ) -3 - STJ – Structural Transition Joints

Reactor Tube sheet First we have to make cladding plate : ASME SA-240 304 L + ASME SB 265 Gr. 1, and later …. there is a question, is this should be heat treated or not? THIS WHAT WILL BE TALKING ABOUT ?

CONTROL OF SET AND PROCESS Making cladding of Ti Gr. 1 + 304 L (6 + 95 mm) Control of explosive’s thickness Measurement of detonation speed in productive set -5 -

And we back to the question, if cladding plate Ti Gr. 1 + 304 L should be heat treated or not? From cladding plate in sizes: (6+95) x 3150 mm was taken test plate and test samples. 6

TEST’S We are making heat treatments and mechanical property tests Parameters of Heat Treatment Number of test plate Results of mechanical test Rs – shear test Ro – tensile test [MPa] / średnia Temp. Time [ C] [h] Without HT With HT P 158/2/2/PO 1 540 1 441 302 309 181 P 158/2/2/PO 2 540 2 385 332 408 298 P 158/2/2/PO 3 610 2 406 324 374 212 P 158/2/2/PO 4 650 4 360 292 220 140 Result’s of Test -7 -

TEST’S Microhardness -8 -

TEST’S Microhardness in meltings area P 158/2/2/PO 1 C 150 x P 158/2/2/PO 3 C 100 x P 158/2/2/PO 2 C 100 x 1 mm 165 HV 1 mm 0, 1 1 mm 171 147 HV HV 0, 1 178 HV 0, 1 153 HV 0, 1 188 HV 0, 1 185 HV 0, 1 707 HV 0, 1 475 HV 0, 1 164 HV 0, 1 670 HV 0, 1 423 HV 0, 1 251 HV 0, 1 423 191 HV HV 0, 1 989 HV 0, 1 468 HV 0, 1 417 HV 0, 1 179 HV 0, 1 403 HV 0, 1 240 HV 0, 1 988403 HV HV 0, 1 393 HV 0, 1 429 HV 0, 1 418 363 HV 0, 1 179 HV 0, 1 183 HV 0, 1 172308 HVHV 0, 1 191 HV 0, 1449 HV 0, 1 418 HV 0, 1 3240, 1 HV 0, 1 327 HV 172 HV 0, 1 188 HV 0, 1 173 HV 0, 1 300 x 165 HV 0, 1193 HV 182 HV 0, 1 P 158/2/2/PO 2 C 0, 1 935 HV 0, 1 412 HV 0, 1 354 HV 0, 1 167 HV 0, 1 439 HV 393 0, 1 HV 0, 1 181 439 HV 0, 1 389 HV 0, 1 408 HV 0, 1 272423 HV 0, 1 283 HV 0, 1 191 HV 0, 1 450 HV 0, 1 1 mm 398 1 mm 331 HVHV 1 mm 331 HV 0, 1 439 HV 0, 1 450 HV 0, 1 -9 -

TEST’S Structural tests 304 L; intergranular corrosion. 304 L P 158/2/2/PO 3 P 158/2/2/PO 1 P 158/2/2/PO 2 Temp. Time [ C] [h] 610 xxx 540 2 1 xxx 2 - 10 -

TEST’S STRUCTURE OF BOND, DIFFUSSION LAYER - 11 -

TEST’S SCHEDULE OF ELEMENTS IN DIFFUSSION LAYER SCHEDULE OF CARBON CONTENTS IN DIFFUSSION LAYER - 12 -

TEST’S CHANGE OF SCHEDULE OF ELEMENTS IN DIFFUSION LAYER AFTER HEAT TRAETMENT ACCUMULATION OF CARBON IN DIFFUSSION LAYER - 13 -

TEST’S Conclusions 1. HEAT TREATMENT MAKES DECREASING HARDENING IN BOTH MATERIALS AND IN BOND ZONE. Positive… 2. ACCUMULATION OF CARBON IN DIFFUSSION LAYER CAN MAKE INCREASING OF ITS FRAGILE WHAT MEANS ALSO DECREASING OF BOND STRENGHT Negative … 3. ECXALATION OF CHROMIUM CARBIDE ON THE BORDER OF GRAINS IN AUSTENITIC STAINLESS STEEL CAN MAKE DECREASING ITS RESISTANCE FOR INTERGRANULAR Negative … CORROSION BECAUSE OF OBSERVED DECREASNG OF STRENGTH OF BOND ZONE AND BECASUE OF UNPROFITABLE PHENOMENONS DESCRIBED IN POINT 2 AND 3 IN CONCLUSIONS, HEAT TRAETMENT OF CLADS TITANIUM – AUSTENITIC STAINLESS STEEL SEEMS TO BE INEXPEDIENT. - 14 -

SME COMPANY CHARACTERISTIC xplomet Zakład Technologii Wysokoenergetycznych „EXPLOMET” Gałka, Szulc Sp. j. High-Energy Techniques Works Employment: 6 workers Seat: 860 m 2 , including: room and workshop, social back-up facilities, store rooms, offices. Company details: Address: ul. Oświęcimska 100 H, 45 -641 Opole, POLAND Tel. : +48 (077) 45 17 817; 45 17 818; 45 17 819 45 62 374, Fax: +48 (077) 45 62 511 E-mail: explomet@op. onet. pl ; biuro@explomet. pl; http: // www. explomet. pl - 15 -

Thank you for attention…… W prezentacji wykorzystano materiały firmy EXPLOMET S. C. oraz Politechniki Opolskiej - 16 -