Modification of inorganic binder used for sand core-making in foundry practice

Xin, Fanghai; Liu, Weihua; Song, Lai; Li, Yingmin

doi:10.1007/s41230-020-0018-2

Cited by 14 publications

(5 citation statements)

References 13 publications

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“…Compared to earlier product generations, the newest inorganic binder offers an improved humidity resistance, as stated by several research studies. 23,28,43 Specific additives, added to enhance the humidity resistance of cores, enable reaching up to 5 days of storage at 30°C and 70 % relative humidity without any significant impairment of strength. The literature and present findings revealed that inorganic cores exhibit a greater tendency to moisture absorption, as confirmed by the greater HL values resulting from the moisture absorption comparative tests conducted through the climatic chamber.…”

Section: Discussionmentioning

confidence: 99%

A Comparative Analysis on Organic and Inorganic Core Binders for a Gravity Diecasting Al Alloy Component

Fortini

Merlin

Raminella³

2021

Inter Metalcast

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The last two decades have seen a growing trend toward the use of inorganic binders in core making for the metalcasting field. Despite the health and environmental benefits of the inorganic binders, wider commercial use requires ongoing technical improvements to address some potential inherent limitations of this technology. Considering that inorganic cores can suffer from storage stability, this study sets out to check whether inorganic core binders are fit to replace organic ones in producing a gravity diecasting Al alloy component. First, the humidity resistance of both organic and inorganic sand cores, within a typical time-frame storage in the foundry, was evaluated by moisture absorption tests. Then, 3D optical measurements were performed to assess the relative dimensional changes of inorganic cores. Last, the influence of the core system was analyzed through microstructural and mechanical investigations on castings manufactured by using organic and inorganic binders. The experimental findings have shown that the moisture absorption during storage in the foundry warehouse, which lasted up to 14 days, was not enough to jeopardize the functionality of the cores. Furthermore, the tensile and microstructural outcomes revealed that inorganic cores could comply with both high component design requirements and even more stringent environmental regulations of foundries.

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Section: Discussionmentioning

confidence: 99%

A Comparative Analysis on Organic and Inorganic Core Binders for a Gravity Diecasting Al Alloy Component

Fortini

Merlin

Raminella³

2021

Inter Metalcast

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“…Table 2 lists the hardness results and S/N values. Since the experimental design is orthogonal, it is possible to separate out the effect of each T6I6 process factor at different levels [20][21][22] . For example, the mean S/N value for initial aging temperature at Levels 1, 2, 3, 4 and 5 can be calculated by averaging S/N values for the Experiments 1 to 5, 6 to 10, 11 to 15, 16 to 20 and 21 to 25, respectively.…”

Section: Hardness and Calculated S/n Valuesmentioning

confidence: 99%

Effect of secondary aging on microstructure and properties of cast Al-Cu-Mg alloy

Jia

Xiao³

et al. 2023

China Foundry

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Al-Cu-Mg alloys have been widely used as structural materials for the aerospace industry due to their high tensile strength, toughness and good processability [1][2][3][4][5] . The hardness and strength of Al-Cu-Mg alloys are low, and pitting corrosion, intergranular corrosion (IGC) and local corrosion always occur in Al-Cu-Mg alloys [6,7] , which limit their industrial applications. Therefore, improving the comprehensive properties of Al-Cu-Mg alloys has always been the focus of research.Numerous studies have shown that heat treatment can significantly enhance the properties of Al-Cu-Mg alloys [8][9][10] . The standard T6 process can improve the mechanical properties of Al-Cu-Mg alloys, but the improvement is limited. To further improve the mechanical properties of the alloy, Lumley et al. [11] proposed the secondary aging process. The secondary aging process means that the standard T6 process is interrupted for a period at a lower temperature. The secondary aging process is called the T6I4 or T6I6

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“…The decoring of inorganically bound sand cores is their main disadvantage. There are multiple approaches to change the properties, for example, adding additives or changing the ratio of binder to sand [4].…”

Section: Decoring Of Inorganically Bound Sandcoresmentioning

confidence: 99%

Predicting and Evaluating Decoring Behavior of Inorganically Bound Sand Cores, Using XGBoost and Artificial Neural Networks

Dobmeier,

Li,

Ettemeyer

et al. 2023

Applied Sciences

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Complex casting parts rely on sand cores that are both high-strength and can be easily decored after casting. Previous works have shown the need to understand the influences on the decoring behavior of inorganically bound sand cores. This work uses black box and explainable machine learning methods to determine the significant influences on the decoring behavior of inorganically bound sand cores based on experimental data. The methods comprise artificial neural networks (ANN), extreme gradient boosting (XGBoost), and SHapley Additive exPlanations (SHAP). The work formulates five hypotheses, for which the available data were split and preprocessed accordingly. The hypotheses were evaluated by comparing the model scores of the various sub-datasets and the overall model performance. One sand-binder system was chosen as a validation system, which was not included in the training. Robust models were successfully trained to predict the decoring behavior for the given sand-binder systems of the test system but only partially for the validation system. Conclusions on which parameters are the main influences on the model behavior were drawn and compared to phenomenological–heuristical models of previous works.

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Modification of inorganic binder used for sand core-making in foundry practice

Cited by 14 publications

References 13 publications

A Comparative Analysis on Organic and Inorganic Core Binders for a Gravity Diecasting Al Alloy Component

A Comparative Analysis on Organic and Inorganic Core Binders for a Gravity Diecasting Al Alloy Component

Effect of secondary aging on microstructure and properties of cast Al-Cu-Mg alloy

Predicting and Evaluating Decoring Behavior of Inorganically Bound Sand Cores, Using XGBoost and Artificial Neural Networks

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