Effect of special combined electromagnetic stirring mode on macrosegregation of high strength spring steel blooms

2008 ◽  
Vol 35 (2) ◽  
pp. 153-156 ◽  
Author(s):  
W.-D. Du ◽  
K. Wang ◽  
C.-J. Song ◽  
H.-G. Li ◽  
M.-W. Jiang ◽  
...  
Keyword(s):  
High Strength ◽  
Spring Steel ◽  
Electromagnetic Stirring

INLAND DURASPRING

Alloy Digest ◽  
1998 ◽  
Vol 47 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Tensile Properties ◽  
High Stress ◽  
High Strength ◽  
Spring Steel ◽  
Fatigue Properties ◽  
Light Truck ◽  
Suspension Systems ◽  
Spring Steels

Abstract Inland DuraSpring is a high-strength microalloyed spring steel for use in high stress coil springs for automobile and light truck suspension systems. This bar product offers significant improvements in tensile strength, fatigue properties, and fracture toughness compared to conventional spring steels. This datasheet provides information on composition, hardness, and tensile properties as well asfracture toughness and fatigue. Filing Code: SA-496. Producer or source: Ispat Inland Inc.

scholarly journals Documentation of the Corrosion of Composite-Extruded Aluminium Matrix Extrusions Using the Push-Out Test

2008 ◽  
Vol 43 ◽  
pp. 17-22 ◽  
Author(s):  
Matthias Merzkirch ◽  
Kay André Weidenmann ◽  
Eberhard Kerscher ◽  
Detlef Löhe
Keyword(s):  
Shear Strength ◽  
High Strength ◽  
Spring Steel ◽  
Aluminium Matrix ◽  
Corrosive Media ◽  
Corrosive Attack ◽  
Galvanic Couple ◽  
Space Frames ◽  
Push Out

A possibility to increase both stiffness and strength of aluminium-based structures for the application in lightweight profiles for vehicle space frames is the use of composite extrusions in which high-strength metallic reinforcements are incorporated. Within the scope of the present investigations, composite-extruded profiles with wire-reinforcements made of austenitic spring steel 1.4310 (X10CrNi18-8), in an aluminium matrix AA6060 (AlMgSi0.5), which were exposed to different corrosive media for different times, were characterised in terms of the debonding shear strength using the push-out-technique. The formation of a galvanic couple could be conceived mathematically in regard of terms describing the formation of a shear-impeding layer and the corrosive attack. Thereby the parameters for the different media could be determined.

Achievement of High Ductility and Ultra-high Strength of V-Nb Microalloyed Spring Steel by Austempered Multiphase Microstructure

2020 ◽  
Vol 51 (7) ◽  
pp. 3565-3575 ◽  
Author(s):  
Kui Chen ◽  
Zhouhua Jiang ◽  
Fubin Liu ◽  
Huabing Li ◽  
Congpeng Kang ◽  
...  
Keyword(s):  
High Strength ◽  
Spring Steel ◽  
High Ductility ◽  
Multiphase Microstructure

Gigacycle Fatigue Behavior of 1800 MPa Grade High Strength Spring Steel for Automobile Lightweight

2014 ◽  
Vol 21 (6) ◽  
pp. 614-618 ◽  
Author(s):  
Ji-ming Zhang ◽  
Ling-kang Ji ◽  
Dong-jie Bao ◽  
Yao-rong Feng ◽  
Shou-xin Li ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
High Strength ◽  
Spring Steel

Optimization of a Snap Through Spring for a Hydraulic Valve With Hysteresis Response Behavior

2019 ◽  
Author(s):  
Matthias Scherrer ◽  
Rudolf Scheidl ◽  
Bernhard Manhartsgruber
Keyword(s):  
Ritz Method ◽  
High Strength ◽  
Axial Direction ◽  
Approximate Solutions ◽  
Element Model ◽  
Lateral Force ◽  
Spring Steel ◽  
Nonlinear Buckling ◽  
Buckling Beam ◽  
Compact Design

Abstract The hydraulic binary counter requires switching valves with a hysteretic response. In this paper an elastic snap through element is studied as means for that. The concept is based on a buckling beam which is elastically supported in axial direction in order to adjust its buckling properties with moderate manufacturing precision and to assure a well defined snap through behavior. The elastic support is provided by a cantilever beam. A rigorous optimization is performed heading for a most compact and fatigue durable design which exhibits the required lateral force displacement characteristics. A genetic algorithm is used to find the global design optimum. The stress/displacement properties of each design variant are computed by a compact model of the snap through system. It is derived by a Ritz method to obtain approximate solutions of the nonlinear buckling beam behavior. Its validity is checked by a Finite Element model. A compact design is possible if high strength spring steel is used for the elastic elements.

scholarly journals Tensile and fatigue properties of laser-welded ultra-high-strength stainless spring steel lap joints

2019 ◽  
Vol 36 ◽  
pp. 131-137 ◽  
Author(s):  
Mikko Hietala ◽  
Antti Järvenpää ◽  
Markku Keskitalo ◽  
Matias Jaskari ◽  
Kari Mäntyjärvi
Keyword(s):  
High Strength ◽  
Lap Joints ◽  
Spring Steel ◽  
Fatigue Properties

scholarly journals Micro formed holographic security features in steel

2018 ◽  
Vol 190 ◽  
pp. 10002
Author(s):  
Eckart Uhlmann ◽  
Stephanie Schulze ◽  
née Frenzel ◽  
Julian Polte ◽  
Christoph Hein ◽  
...  
Keyword(s):  
Vapour Deposition ◽  
Base Material ◽  
High Strength ◽  
Spring Steel ◽  
Product Integration ◽  
Business Results ◽  
Brand Reputation ◽  
Novel Approach ◽  
Preliminary Study ◽  
The Individual

Counterfeiting, with a global trade volume of approximately 450 billion euro a year compromises business results of companies in all industrial segments. At worst, product plagiarism causes severe damages to the individual brand reputation due to product defects or liability issues. Therefore, product integration of inseparable and unique security features is essential for a preserving market share in all manufacturing branches. This paper presents a novel approach regarding a replication technology for the manufacturing of holographic security features. Using a microstructured aluminium substrate with holographic properties as a base material, a forming die is manufactured by a combination of physical vapour deposition (PVD) and galvanic coating processes. Furthermore, a process adapted hardness progression between individual layers was created. By the use of this die, the forming of a holographic microstructure into high strength aluminium alloy (3.3547) and spring steel (1.1248) could be demonstrated within a preliminary study.

Properties of Thixocast Spring Steel Ratchets

2012 ◽  
Vol 192-193 ◽  
pp. 197-203
Author(s):  
Matthias Bünck ◽  
Andreas Bührig-Polaczek
Keyword(s):  
Mechanical Load ◽  
Protective Coatings ◽  
Load Capacity ◽  
Chemical Deposition ◽  
Charpy Impact ◽  
High Strength ◽  
Spring Steel ◽  
Hand Tools ◽  
Heat Treated ◽  
Cast Parts

Forging is state of the art for the production of hand tools in industrial scales. Due to high demands on stiffness and fracture toughness high-strength forged steels are used to provide components with high mechanical load capacity. In spite of all advantages forging is restricted by some means like the freedom of scope. However, because of the extreme thermal load and the hardly avoidable casting defects, hand tools are nowadays not cast. By thixocasting steel technical difficulties can be reduced and new options are provided, which allow manufacturing of components with much higher complexity than forging. During this work ratchets were thixocast successfully using spring steel type 61SiCr7. Based on the STC-concept, a new method to prevent the shot sleeve from damage was tested. Dies made of hot forming tool steel X38CrMoV5 were optimized by simulation and coated by plasma chemical deposition of crystalline Al2O3 protective coatings. The cast parts were heat treated successfully to enhance the toughness, which was measured by tensile and Charpy impact tests.

Microstructural influence on fatigue properties of a high-strength spring steel

1998 ◽  
Vol 241 (1-2) ◽  
pp. 30-37 ◽  
Author(s):  
C.S Lee ◽  
K.A Lee ◽  
D.M Li ◽  
S.J Yoo ◽  
W.J Nam
Keyword(s):  
High Strength ◽  
Spring Steel ◽  
Fatigue Properties
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