Semisolid Forging of Hypereutectic Al-Si Alloy for Automobile AC Compressor Components

2012 ◽  
Vol 192-193 ◽  
pp. 551-555
Author(s):  
Zhi Feng Zhang ◽  
Jun Xu ◽  
Yue Long Bai ◽  
Ya Bao Wang
Keyword(s):  
Cast Iron ◽  
High Performance ◽  
Low Cost ◽  
Nodular Cast Iron ◽  
Transportation Systems ◽  
Light Metals ◽  
Forming Process ◽  
Forging Process ◽  
Swash Plate ◽  
Near Net Shape

Semisolid forging process, characterized by short process, near-net shape, low cost, and high performance, is increasingly playing an important role in lightweighting transportation systems for light metals. In this study, semisolid forging process for hypereutectic Al-Si alloy, as a substitute for nodular cast iron, was applied in producing automobile AC compressor components. The results showed that hypereutectic Al-Si alloy swash plate thixo-forged had higher strength than nodular cast iron one by optimizing forming process parameters.

A Novel Forming Process for Powder Metallurgy of Superalloys

2014 ◽  
Vol 622-623 ◽  
pp. 833-839 ◽  
Author(s):  
Qian Bai ◽  
Jian Guo Lin ◽  
Gao Feng Tian ◽  
Daniel S. Balint ◽  
Jin Wen Zou
Keyword(s):  
Powder Metallurgy ◽  
Relative Density ◽  
High Performance ◽  
Low Cost ◽  
Hot Isostatic Pressing ◽  
Hot Extrusion ◽  
Forming Process ◽  
Isostatic Pressing ◽  
Wide Range ◽  
Forming Temperature

Powder metallurgy (PM) of nickel-based superalloys has been used for a wide range of products owing to their excellent special properties in processing and applications. Typical processes for high performance PM superalloys include hot isostatic pressing, hot extrusion and hot isothermal forging. Hot isostatic pressing is normally conducted at a high temperature, by using a low pressure for a long time in a closed vessel, resulting in high cost and low product efficiency. In this paper a novel forming process, i.e. direct powder forging for powder metallurgy of superalloys has been proposed. In this process, the encapsulated and vacuumed powder is heated up to the forming temperature and forged directly to the final shape, by using a high forming load for a very short time. Direct powder forging is a low-cost and energy-saving process compared to conventional PM processes, and in addition, press machines of conventional forging can be used for direct powder forming process. In direct powder forging it is important to control the relative density of the deformed part since the existence of voids could reduce the mechanical strength and fatigue life. In this paper, feasibility tests of direct powder forging are presented. Microstructure, relative density and hardness of the formed specimen were studied.

Spin Formability of Al-6061 Aluminum Alloy Pre-Forms Obtained via Liquid Forging

2010 ◽  
Vol 447-448 ◽  
pp. 422-426
Author(s):  
Chun Wei Su ◽  
Peng Hooi Oon ◽  
Kai Soon Fong ◽  
Hossein Sina ◽  
Chow Cher Wong
Keyword(s):  
Production Costs ◽  
Forming Process ◽  
Precision Engineering ◽  
6061 Aluminum Alloy ◽  
Forging Process ◽  
Al 6061 ◽  
Aspect Ratios ◽  
End Products ◽  
Near Net Shape ◽  
Engineering Industries

There are growing demands from the precision engineering industries for components that are net or near net shape while striving to reduce material wastage during the manufacturing process. This study investigates the spin formability of liquid forged Al-6061 pre-forms into near net shape cylindrical components with high aspect ratios. The liquid forging process offers very significant materials savings by providing pre-forms for the spin forming process. The end products are near net shape components with very good mechanical properties. Results from this study indicate that liquid forging is able to supply Al-6061 pre-forms, otherwise machined from solid bars, which are sufficiently formable for spin forming. The microstructure of a spin formed liquid forged pre-form is also indiscernible from that of a fully machined pre-form from extruded bar stock. As such, spin forming of liquid forged pre-forms has the potential to reduce material wastage and hence production costs.

scholarly journals PENGARUH PENAMBAHAN NIKEL TERHADAP KEKUATAN TARIK DAN KEKERASAN PADA BESI TUANG NODULAR 50

2017 ◽  
Vol 8 (2) ◽  
pp. 41
Author(s):  
Sudarmanto Sudarmanto
Keyword(s):  
Cast Iron ◽  
New Technologies ◽  
Low Cost ◽  
Nodular Cast Iron ◽  
Experimental Results ◽  
Base Metals ◽  
Spherical Structure ◽  
Properties Of Materials ◽  
Nodular Graphite

Nodular cast iron is the cast iron that has nodular graphite spherical structure distributed in ferrite or pearlite matrix or in both of them. Recently, this material is used widely in industries because its low cost and better performance. The advanced metal industries nowadays have found some new technologies in order to improve the properties of materials. One of them is the addition of another elements into the base metals, such as nickel. The effects of the addition 1wt %, 2wt % and 3wt % nickel into nodular cast iron 50 on tensile and hardness properties were investigated in this study. The experimental results show that the best amount of nickel that added into nodular cast iron is 3% wt, which has the best tensile and hardness properties

EXPERIMENTAL INVESTIGATION ON THE MAXIMUM AXIAL FORCE OF AN ALUMINUM SQUARE COLUMN

2015 ◽  
Vol 76 (11) ◽  
Author(s):  
Hafizi Lukman ◽  
Amir Radzi Ab. Ghani ◽  
Hafizan Hashim ◽  
Mohd Adzureen Bin Zulkefli ◽  
M Mahat
Keyword(s):  
Energy Absorption ◽  
Design Patterns ◽  
High Performance ◽  
Low Cost ◽  
Transportation Systems ◽  
Peak Force ◽  
Thin Wall ◽  
Specific Energy Absorption ◽  
Wall Structures ◽  
Initial Peak

Energy absorption is one of the characteristics that must be included especially in transportation systems. This property dissipates kinetic energy during collisions. Normally, industries use thin wall structures because of their ease of fabrication, high performance, and low cost. This study determines the first peak force and energy absorption of an aluminum square column. The square columns prepared with various design patterns exhibited different results. The designs showed favorable results in terms of increasing the specific energy absorption and reducing the initial peak force. To achieve the project objective, this project conducted two types of analyses using INSTRON 3382 for the experimental analysis.

Turbine Disk Forging Process Optimization

1999 ◽  
Author(s):  
Beichang He ◽  
Youdong Zhou ◽  
Ramesh Gambheera ◽  
Shesh K. Srivatsa
Keyword(s):  
Automated Analysis ◽  
Turbine Disk ◽  
Forming Process ◽  
Die Geometry ◽  
Forging Process ◽  
Networked Computing ◽  
Metal Forming Process ◽  
Turbine Disks ◽  
Near Net Shape ◽  
Temperature Strain

Abstract This paper addresses one of the important aspects of the turbine disk forging process — the design of die geometry to achieve near-net-shape forging. The problem is formulated as a parametric geometry and high-fidelity analysis based optimization problem. The forging weight is minimized within prescribed processing windows and forging rules including bounds on strain, temperature, strain rate, press capacity, dwell time, sonic coverage, fillet radius, draft angles, etc. A fully automated analysis and optimization system that works in a heterogeneous and networked computing environment is built on the top of three commercial software packages: DEFORM for simulating metal forming process, Unigraphics for defining and manipulating geometry, and iSIGHT for software integration and optimization. The system is applied to the optimization of turbine disks.

Comparison of UV- and Derivative-Spectrophotometric and HPTLC UVDensitometric Methods for the Determination of Amrinone and Milrinone in Bulk Drugs

2020 ◽  
Vol 16 (3) ◽  
pp. 246-253
Author(s):  
Marcin Gackowski ◽  
Marcin Koba ◽  
Stefan Kruszewski
Keyword(s):  
Thin Layer ◽  
Thin Layer Chromatography ◽  
High Performance ◽  
Low Cost ◽  
Uv Spectra ◽  
Derivative Spectrophotometry ◽  
Therapeutic Monitoring ◽  
Bulk Drug ◽  
Layer Chromatography ◽  
Standard Solutions

Background: Spectrophotometry and thin layer chromatography have been commonly applied in pharmaceutical analysis for many years due to low cost, simplicity and short time of execution. Moreover, the latest modifications including automation of those methods have made them very effective and easy to perform, therefore, the new UV- and derivative spectrophotometry as well as high performance thin layer chromatography UV-densitometric (HPTLC) methods for the routine estimation of amrinone and milrinone in pharmaceutical formulation have been developed and compared in this work since European Pharmacopoeia 9.0 has yet incorporated in an analytical monograph a method for quantification of those compounds. Methods: For the first method the best conditions for quantification were achieved by measuring the lengths between two extrema (peak-to-peak amplitudes) 252 and 277 nm in UV spectra of standard solutions of amrinone and a signal at 288 nm of the first derivative spectra of standard solutions of milrinone. The linearity between D252-277 signal and concentration of amironone and 1D288 signal of milrinone in the same range of 5.0-25.0 μg ml/ml in DMSO:methanol (1:3 v/v) solutions presents the square correlation coefficient (r2) of 0,9997 and 0.9991, respectively. The second method was founded on HPTLC on silica plates, 1,4-dioxane:hexane (100:1.5) as a mobile phase and densitometric scanning at 252 nm for amrinone and at 271 nm for milrinone. Results: The assays were linear over the concentration range of 0,25-5.0 μg per spot (r2=0,9959) and 0,25-10.0 μg per spot (r2=0,9970) for amrinone and milrinone, respectively. The mean recoveries percentage were 99.81 and 100,34 for amrinone as well as 99,58 and 99.46 for milrinone, obtained with spectrophotometry and HPTLC, respectively. Conclusion: The comparison between two elaborated methods leads to the conclusion that UV and derivative spectrophotometry is more precise and gives better recovery, and that is why it should be applied for routine estimation of amrinone and milrinone in bulk drug, pharmaceutical forms and for therapeutic monitoring of the drug.

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