ORNL-2106 - the Molten Salt Energy Technologies Web Site
ORNL-2106 - the Molten Salt Energy Technologies Web Site ORNL-2106 - the Molten Salt Energy Technologies Web Site
1 ANP PROJECT PROGRESS REPORT 0-0 HASTELLOY B TUBE BLANKS EXTRUDED FOR ORNL BY INCO BILLET EXTRUSION TEMPERATURE EXTRUSION RATIO BBB 215OoF 7:1 8-2 8-7 205OoF 215OoF 0 2050°F 5'4 : t 8- t 205OOF 592: f UNCLASSIFIED Y. 18908 Fig. 3.3.2. Hastelloy B Tube Blank Extrusions Fabricated from Commercial-Sire Billets by the Inter- national Nickel Company. 0 5 10 15 20 HASTELLOY B TUBE BLANKS EXTRUDED FOR ORNL BY INCO BILLET EXTRUSION TEMPERATURE EXTRUSION RATIO 8-4 220OoF 1294 : 1 B -5 220OoF 10:1 8-3 21 5OoF 7:1 B-10 2150OF 7:1 UNCLASSIFIED Y.18907 Fig. 3.3.3. Hastelloy B Tube Blank Extrusions Fabricated from Commercial-Sire Billets by the Inter- national Nickel Company. 162 W * . . w I
2. Canning of the billets with '/,-in.-thick type 316 stainless steel appears to be advantageous from the standpoint of reducing the extrusion pressure. Because of the number of variables involved, however, this point needs to be con- firmed. 3. The larger mass of the commercially produced billets made possible the use of lower soaking temperatures at the smaller extrusion ratios (i.e., 5.5:l) than were found to be optimum for the extrusion of small laboratory billets. 4. For successful extrusion of these alloys it is necessary that the billets be upset with suf- ficient pressure to start the material through the die and then extruded ut a relatively slow rate to prevent h ot-sh ort cracking. These were the first successful attempts to extrude these materials on a large scale, and it now appears to be feasible to produce seamless tubing of these alloys, Three Hastelloy B tube blanks and one Hastelloy W tube blank are scheduled to be reduced to 1-in. pipe and small- diameter tubing for use at ORNL. Extrusion of Special Alloys The study of single-phase alloys in the nickel- molybdenum alloy system that contain 15 to 20% molybdenum was continued. It is hoped in this study to find a solution to the problem of em- brittlement of the Hasteltoy-type alloys as a result of aging. At present the only readily apparent solution is to change the composition of the a 1 I oy s. It was reported previously that the corrosion resistance to fused sdlts of the binary alloys of 'T. K. Roche ond H. Inouye, ANP Quar. Prog. Rep. March 10, 1956, ORNL-2061, p 155. PERIOD ENDING JUNE 10, 1956 TABLE 3.3.3. COMPOSITIONS OF SPECIAL ALLOYS PREPARED BY INTERNATIONAL NICKEL COMPANY Alloy No. Composition (wt %) Mo Cr W Nb AI Ti C Ni T-23011 15 5 3 3 0.5 73.5 To23012 17 0.5 82.5 T-23013 15 3 3 0.5 78.5 T-23014 15 1 1.5 82.5 T-23015 15 3 3 0.5 0.25 78.25 Four extrusion billets, 3 in. in diameter and 3 in. long, were machined from each ingot, three for tube blanks and one for rod fabrication. The rod extrusions were for rolling to 0.065-in. strip for the preparation of test specimens for strength evaluation. The initial tube blank extrusion ex- periments involving one billet of each composition met with little success. When a fast extrusion rate was used, the alloys demonstrated the hot- short tendencies of Hastelloy B, with the ex- ception of alloy T-23013, 15% Moa% Nb-3% W-0.5% Al-78.5% Ni. The results of this initial experiment are presented in Table 3.3.4. Before the remaining billets of these alloys were extruded, the results obtained in the fabrication of Hastelloy W at a slow extrusion rate were sufficiently favorable io prompt an alteration in TABLE 3.3.4. RESULTS OF PRELIMINARY ATTEMPTS TO EXTRUDE THE SPECIAL ALLOYS PREPARED BY THE INTER- NATIONAL NICKEL COMPANY Extrusion mtio: 5.4:l Mandrel size: 3/4 in. dia Alloy No. Extrusion Temperature Results (OF) T-23011 2060 2100 Good tube blank obtained Press stalled T-23015 2080 Tube blank crocked on the inside 163
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- Page 175 and 176: UNCLASSIFIED PHOTO 17248 Fig. 3.4.1
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1<br />
ANP PROJECT PROGRESS REPORT<br />
0-0<br />
HASTELLOY B TUBE BLANKS EXTRUDED FOR <strong>ORNL</strong> BY INCO<br />
BILLET EXTRUSION TEMPERATURE EXTRUSION RATIO<br />
BBB 215OoF 7:1<br />
8-2<br />
8-7<br />
205OoF<br />
215OoF<br />
0 2050°F 5'4 : t<br />
8- t 205OOF 592: f<br />
UNCLASSIFIED<br />
Y. 18908<br />
Fig. 3.3.2. Hastelloy B Tube Blank Extrusions Fabricated from Commercial-Sire Billets by <strong>the</strong> Inter-<br />
national Nickel Company.<br />
0 5 10 15 20<br />
HASTELLOY B TUBE BLANKS EXTRUDED FOR <strong>ORNL</strong> BY INCO<br />
BILLET EXTRUSION TEMPERATURE EXTRUSION RATIO<br />
8-4 220OoF 1294 : 1<br />
B -5 220OoF 10:1<br />
8-3 21 5OoF 7:1<br />
B-10 2150OF 7:1<br />
UNCLASSIFIED<br />
Y.18907<br />
Fig. 3.3.3. Hastelloy B Tube Blank Extrusions Fabricated from Commercial-Sire Billets by <strong>the</strong> Inter-<br />
national Nickel Company.<br />
162<br />
W *<br />
.<br />
.<br />
w<br />
I
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