Analysis of Charge Weld Evolution for a Multi-Holes Extrusion Die

2011 ◽  
pp. 263-271
Author(s):  
Antonio Segatori ◽  
Barbara Reggiani ◽  
Lorenzo Donati ◽  
Luca Tomesani
Keyword(s):  
Extrusion Die ◽  
Charge Weld

UNS T20819

Alloy Digest ◽  
1989 ◽  
Vol 38 (2) ◽  
Keyword(s):  
Elevated Temperatures ◽  
Hot Extrusion ◽  
Heat Treating ◽  
High Toughness ◽  
Extrusion Dies ◽  
Extrusion Die ◽  
Steel Mills ◽  
Temperature Performance ◽  
Heat Checking ◽  
Resistance To Heat

Abstract UNS T20819 is a hot-work tool and die steel that is characterized by excellent resistance to shock and abrasion at elevated temperatures. This steel provides relatively high toughness and outstanding resistance to heat checking and softening at elevated temperatures. Among its many applications are hot-punch tools, forging dies and inserts, brass extrusion dies, permanent molds for brass casting and hot-extrusion die inserts for steel. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on high temperature performance as well as forming, heat treating, machining, and joining. Filing Code: TS-496. Producer or source: Tool steel mills.

YSS DAC 40

Alloy Digest ◽  
2018 ◽  
Vol 67 (1) ◽  
Keyword(s):  
Elevated Temperature ◽  
High Strength ◽  
Heat Treating ◽  
Aluminum Extrusion ◽  
Die Steel ◽  
Extrusion Die

Abstract YSS DAC 40 high-strength aluminum extrusion die steel has higher strength and better softening resistance at elevated temperature than DAC. This datasheet provides information on composition and elasticity. It also includes information on heat treating. Filing Code: TS-746. Producer or source: Hitachi Metals America Ltd.

Accurate Simulation of the Four Modes of Post-Die Extrudate Shape Distortion

2021 ◽  
Vol 36 (1) ◽  
pp. 69-78
Author(s):  
M. Gupta
Keyword(s):  
Layer Structure ◽  
Die Design ◽  
Velocity Variation ◽  
Shape Distortion ◽  
Exit Velocity ◽  
Extrusion Die ◽  
Combined Flow ◽  
Extruded Product ◽  
Simulation Results ◽  
Extrudate Distortion

Abstract A combined flow, thermal and structural analysis is employed to simulate post-die extrudate distortion in different profile dies. All four factors which can cause extrudate distortion, namely, nonuniform exit velocity distribution, extrudate shrinkage, extrudate draw down, and deformed shape of the calibrator or sizer profile, are simulated. To analyze the effect of exit velocity variation on extrudate distortion, the parameterized geometry of a simple profile die is optimized using an extrusion die optimization software. The simulation results presented for a bi-layer profile die successfully demonstrate how gradually changing profile shape in successive calibrators/sizers can be used to simplify the die design for extrusion of complex profiles. The predicted extrudate shape and layer structure for the bi-layer die are found to accurately match with those in the extruded product.

scholarly journals Optimization of Polymer Extrusion Die Based on Response Surface Method

Processes ◽  
2020 ◽  
Vol 8 (9) ◽  
pp. 1043 ◽  
Author(s):  
Amin Razeghiyadaki ◽  
Dichuan Zhang ◽  
Dongming Wei ◽  
Asma Perveen
Keyword(s):  
Three Dimensional ◽  
Theoretical Work ◽  
Optimization Method ◽  
Extrusion Die ◽  
Surface Method ◽  
Spline Fitting ◽  
Die Profile ◽  
Response Optimization ◽  
Geometric Variables ◽  
Volume Method

A coupled surface response optimization method with a three-dimensional finite volume method is adopted in this study to identify five independent geometric variables of the die interior that provides a design with the lowest velocity variance at the exit of the coat-hanger extrusion die. Two of these five geometric variables represent the manifold dimension while the other three variables represent the die profile. In this method, B-spline fitting with four points was used to represent the die profile. A comparison of the optimized die obtained in our study and the die with a geometry derived by a previous theoretical work shows a 20.07% improvement in the velocity distribution at the exit of the die.

scholarly journals Failure analysis of a hot extrusion die used for Al-Li alloy processing

1992 ◽  
Vol 15 (2) ◽  
pp. 171-181
Author(s):  
U Rama Murty ◽  
G S Avadhani ◽  
E S Dwarakadasa
Keyword(s):  
Failure Analysis ◽  
Hot Extrusion ◽  
Extrusion Die

Entrance shape design of spread extrusion die for large-scale aluminum panel

2018 ◽  
Vol 101 (5-8) ◽  
pp. 1725-1740 ◽  
Author(s):  
Zhiwen Liu ◽  
Luoxing Li ◽  
Jie Yi ◽  
Guan Wang
Keyword(s):  
Large Scale ◽  
Shape Design ◽  
Extrusion Die
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