Study on Properties of High Strength Steel during Warm Roll Forming

2012 ◽  
Vol 472-475 ◽  
pp. 2783-2787 ◽  
Author(s):  
Pei Jie Yan ◽  
Jing Tao Han ◽  
Zheng Yi Jiang ◽  
Hei Jie Li ◽  
Dan Yang Li
Keyword(s):  
High Strength Steel ◽  
High Strength ◽  
New Method ◽  
Experimental Result ◽  
Roll Forming ◽  
Production Cycle ◽  
Complex Process ◽  
Ultra High Strength Steel ◽  
Deformation Complex ◽  
Good Agreement

Roll forming is a 3D deformation complex process. Stiffness of stands and strength of shafts are the preconditions for the production of precision products. However, the existing roll forming equipment cannot meet the requirements of the production for high strength steel or ultra high strength steel. In order to solve the forming problem of high strength steel or ultra high strength steel, it needs to redesign a set of roll forming equipment. The redesign of roll forming equipment not only makes the production cycle too long, but also results in a high cost. So it is not suitable for the production of forming products. In this paper, based on the existing roll forming equipment a new method of roll forming operation is proposed to optimize the production of U shaped products. The influences of the new method on the roll forming products such as mechanical properties, microstructures and surface qualities, have also been discussed, Based on the new warm roll forming operation, numerical simulation has also been carried out. The simulation result of geometry is in good agreement with experimental result.

scholarly journals Experimental Investigation on Failure Behaviors of G50 Ultra-High Strength Steel Targets Struck by Tungsten Alloy Spherical Fragments at High Velocity

2021 ◽  
Vol 7 ◽  
Author(s):  
Hu Peng ◽  
Wang Shouqian ◽  
Feng Xiaowei ◽  
Li Juncheng ◽  
Lu Zhengcao ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Velocity ◽  
High Strength Steel ◽  
High Strength ◽  
Tungsten Alloy ◽  
Rarefaction Waves ◽  
Depth Of Penetration ◽  
Penetration Process ◽  
Ultra High Strength Steel ◽  
Good Agreement

An experimental investigation is presented into the failure behaviors of the G50 ultra-high strength steel targets struck by tungsten alloy spherical fragments at high velocity. The depth of penetration and the crater volume of G50 steel targets at velocities ranging from 923 to 1,807 m/s are obtained by ballistic gun experiments. A conic-like crater is observed in the G50 steel target after impact by a tungsten alloy spherical fragment, which is different from that in the experiments of low strength steel targets. It is believed that the eroding and fragmentation of the tungsten fragment during the penetration process give rise to this phenomenon. In addition, several tensile cracks are found both at the crater surface and the crater bottom, which are considered to be caused by tensile stress induced by the superposition of rarefaction waves at some local areas of the impacted interface. Numerical simulations of the penetration of tungsten alloy fragments into G50 steel targets are performed to predict failure features of the targets. It is shown that the numerical results are in good agreement with available experimental results.

Robust Optimization Design of Ultra High Strength Steel Roll Forming Based on Response Surface Method

2010 ◽  
Vol 20-23 ◽  
pp. 1416-1422
Author(s):  
Fei Han ◽  
Zheng Qing Ai ◽  
Ji Ying Liu ◽  
Zuo Jun Jing
Keyword(s):  
Response Surface ◽  
High Strength Steel ◽  
Optimization Design ◽  
High Strength ◽  
Roll Forming ◽  
The Finite Element Method ◽  
Steel Roll ◽  
Optimum Parameters ◽  
Ultra High Strength Steel ◽  
Robust Optimization Design

Springback is the main defect in ultra high strength steel roll forming. It can be reduced or eliminated by manipulating a suitable parameters, such as, roller corner radius and overbending angles. But it is difficult to attain the optimum parameters during roll forming. This paper deals with the optimization of roll forming parameters in order to compensate the springback, a new optimization algorithm integrating the finite element method (FEM) and adaptive response surface methodology (RSM) is presented. Finally, The springback benchmark of U-profiled section roll forming has been utilized to validate the method, and good results of springback elimination have been obtained.

scholarly journals EFFECT OF ELECTRIC CURRENT PULSE ON MECHANICAL PROPERTIES OF ULTRA-HIGH STRENGTH STEEL 1180CP

2018 ◽  
Vol 54 (5A) ◽  
pp. 82
Author(s):  
Nguyen Trung Thien
Keyword(s):  
Mechanical Properties ◽  
Electric Current ◽  
High Strength Steel ◽  
Uniform Elongation ◽  
High Strength ◽  
Single Pulse ◽  
Experimental Result ◽  
Pulse Electric Current ◽  
Ultra High Strength Steel ◽  
Pulse Electric

Effect of the pulse electric current on mechanical properties of an ultra-high strength steel (UHSS) is experimentally investigated. A single pulse of electric current with a short duration of 0.36 sec is applied to the specimen under tensile plastic loading. The experimental result showed that flow stress of the UHSS nearly instantly drops at moment of electric current, following strain hardening until necking of the specimen. Uniform elongation completely depends on the pulsing strain, while ultimate tensile strength slightly changes after electric current.

Investigation of High Strength Steel for Automotive Roll-Forming Parts

2011 ◽  
Vol 189-193 ◽  
pp. 3001-3006 ◽  
Author(s):  
Pei Jie Yan ◽  
Jing Tao Han ◽  
Zheng Yi Jiang ◽  
Hei Jie Li ◽  
Li Xian Liu
Keyword(s):  
High Strength Steel ◽  
Human Life ◽  
High Strength ◽  
Structure Design ◽  
Roll Forming ◽  
Advanced Manufacturing ◽  
Forming Process ◽  
Ultra High Strength Steel ◽  
Automotive Parts ◽  
Roll Forming Process

In recent years, the number of automobiles has been steadily increasing, which has significantly impacted on the society and human life, and led to many social problems such as fuel crisis, environment pollution. Therefore, lightweight designing becomes a focused issue. Lightweight materials application, optimized structure design and advanced manufacturing process are the main ways to achieve the lightweight. However, low plasticity and ductility of high strength steel constrain the application of high strength steel. In this paper, the basic principle of roll forming for automotive parts is investigated, and it is innovatively applied in the hot roll forming process of the ultra high strength steel.

CRUCIBLE D6

Alloy Digest ◽  
1962 ◽  
Vol 11 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Low Temperature ◽  
High Strength Steel ◽  
High Strength ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Performance ◽  
Ultra High Strength Steel ◽  
Crucible Steel

Abstract Crucible D6 is a low alloy ultra-high strength steel developed for aircraft-missile applications and primarily designed for use in the 260,000-290,000 psi tensile strength range. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness, creep, and fatigue. It also includes information on low temperature performance as well as forming, heat treating, machining, and joining. Filing Code: SA-129. Producer or source: Crucible Steel Company of America.

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