Fig. 11 Yield has been improved from 58% (top) to 76% (bottom), in addition to optimising finishing times (carbon steel).


ӟս率ђ 最高 升 ֣ 高ӱд 最Ѻ 还ѩ化д 碳钢 间时理הե


in the different melts of the experimental stage. Amongst the discovered advantages, it is worth citing: • Lower mold thermal inertia meaning a reduction in local thermal loads, which becomes a foundry related defect prevention tool (cracks, segregations, etc.).


• More favorable micro-structures and minimization of the grain growth phenomena.


• Lower amount of scrap and higher material rotation. The furnaces are loaded with higher ingot percentages, which directly increase the quality of the metal.


• Lower material loss due to non-reusable in-house pro- duced scraps (contaminated risers).


• Risers with reduced section can help avoid, in some cases, the annealing/ tempering treatment needed to cut out the feeding system without generating cracks in the part.


Industrial Trials With the objective of performing the industrial valida-


tion of the new feeding systems and generating a set of representative real part examples that show the competitive advantages achieved in the development of the “SUPERAL- LOY” project, several real-foundry industrial trials have been performed. Te scheme of the melts has been pretty simple, since the


use of traditional feeding systems and advanced ones has been compared, making clear the direct improvements in terms of yield. Te industrialization stage has been carried out on


components belonging to different customer-sectors, and consequently, good internal soundness has been established as an indispensable condition for the acceptance of every test. In advance of each industrial assessment the correspond-


ing preliminary validations are done, employing the thermo- physical characterization of the new formulations as the input data for the calculations. Some examples are presented in the figures on the previous page, so the yield improvement that is achieved by applying the developed knowledge can be clearly visualized (Figs. 10 and 11). Te control over the simulation tools that are currently


available, provided that the thermo-physical characteristics of the new formulations are properly implemented, allows a company to perform melts, even single part batches, bearing yield optimisation criteria at all times. ■


March 2016 FOUNDRY-PLANET.COM | MODERN CASTING | CHINA FOUNDRY ASSOCIATION | 63


ش最ङ象现长生ট晶Ճљ构ৈ观微ङӯ有ך更 ș 化。


锭铸ङ炉炼熔。加增用ӯ环循料材，صӗ量ս废 ș 。量ૅङً金高提接फՕ，加增量


ф৲）Սӈङ染污ੴ（ս废性次一ङф生部ӄ֜ ș 。صӗע损料材ङ生


火退ङ要必ऋमՕЈӑەп某֨Սӈ颈ঢ়用҅ ș 裂ў铸成造ѫЉЌ，统系ঢ়੭ЈӤ就理ה火֛ ়。


工Џ化ડ生ф


ӟф生并，ચ验૪实化Џ工੧进统系ঢ়੭ङ新ثдО ȕ金合级超Ȕ֨ॐي来ս样ў铸实ऱङ性੮ї有Ӏ批一 工ङ实ऱӧ系一д੧进，势ѩж竞ङ得Ո۱ИՇ开ऩ项 用҅֨统系ঢ়੭进үչ统系ঢ়੭统Ѯйं。ф生ડ化Џ ֣化熔৲֜，升提ङ率սӟдॐي֪显明经已较比ङЇ д੧进Їў铸ङ门部户客գЉйً֨。单এ常非得显Э 工Џ化阶段ङડ验，ৈ果是建立д接Չડ验ৈ果ЉՕ缺 新ر过通。性֑完部ӄङױਧ有须必ў铸即，ў条ङص ੧进֨，算ઋ੧进据数ҵ输Оҁ述描性特理物热ङ方配 工Џછѳӹ便首ү完成дब应ङ初步验ચ。ђљЈ实҆ ѩ率սӟङ现实۱જऽङ得ੂՇ开用҅ӱर֪楚清ՕИ չ ）。 ֣（化


ՕӹऩӲ控过通，ਈ性理物热ङ方配新用҅े正果ײ फ一֨ਈЭ，ў铸З一独单ф生Ց便即，Ӏ工拟模ङ用 ■ 。化熔੧进Јӑەङӕ标化ѩ率սӟ持ґ


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84