Aug 01, 2020 · The near-spherical morphology and uniform distribution of Ni(Al, Fe) nanoprecipitates within maraging steels are shown in Fig. 2a. The ultrahigh strength of 2.2 GPa is attributed to the maximal precipitate dispersion, while the good ductility of 8.2% is associated with elevated dislocation interaction and work hardening upon plastic straining .
Effect of Projection Height on Projection Collapse and Projection welding is a vari - ation of resistance welding in which cur - SAE1010 cold-rolled steel as studied in Ref. 2. Projection heights vary from 0.02 to 0.06 in., and they are obtained by perfect machine follow - u p was assumed. Only 8 cycles of weld time
A mechanical clinching using counter pressure of a rubber disk was developed to join the ultra-high strength steel sheets having low ductility. In the proposed process, the interlock was increased by the increment of metal flow with the counter pressure of rubber disk in the die cavity. The two kind of ultra-high strength steel sheets having different ductility were used in the mechanical clinching.
Influence of Novel Torch Type on Mechanical and The present study aimed to braze interstitial free (IF) steel by using novel Braze+ and conventional Robacta torches with the aid of CuAl8 filler wire for a range of heat input 72250 J/mm. Results showed that focused/denser arc and smaller arc action range, i.e., lower heat loss in the case of Braze+ torch resulted in better wettability, thicker intermetallic layer at the interface of
Joining aluminum alloy to ultrahigh-strength boron steel Aug 01, 2020 · An innovative impact welding approach using VFAW was reported that enabled direct spot welding of 6022-T4 Al alloy to ultrahigh-strength Usibor steel. All the welds were successfully produced in a single step at an energy of 2 kJ without the use of any metal insert and resulted in an undisturbed back surface of the Usibor target plate which can have practical advantages in joining to
Nov 01, 2019 · Ramco, a provider and producer of critical components, has developed an innovative line of weld nuts designed to assist stamping companies and OEMs with thin, ultra-high strength steel applications. Initially developed for boron steels, the new nut has enhanced weld projection geometry designed for extra stability during high-current welding.
Seam Welding - an overview ScienceDirect TopicsSeam welding (Figure 10.54) consists of making a series of overlapping spot welds by means of copper alloy wheel electrodes to produce a leak-tight joint.The electrode wheel applies a constant force to the workpieces and rotates continuously at a controlled speed. The welding current is either pulsed to give a series of discrete spots, or continuous for certain high-speed applications, where
WO2015127431A1 - Process for welding weld nuts to high A process for projection welding a steel weld nut to an ultra high strength steel component using a direct current projection welding machine is provided. The process includes placing a steel weld nut at a predetermined location on the steel component such that the at least one projection of the weld nut is in direct contact therewith.
Proper weld strength for a CJP groove weld is achieved by having complete weld fusion and by using the correct strength filler metal (i.e., one that is of at least matching strength to the base metal). Again, weld strength is not determined by the level of penetration into the base plates. Note also that with a CJP groove weld, the size of the
What are the guidelines for projection welding weld-nuts
EquipmentElectrodesWelding ParametersTestingThe welding equipment should be of an appropriate size, for the particular nut, to allow preferred welding conditions to be used, which should be within the equipment's normal working range. The welding head should be free-moving in its bearings and have a reasonably low inertia, so that good follow-up characteristics, i.e. head movement, can occur when the projections collapse during welding. The machine frame and electrode assembly should be rigid so that flexure, and thus misalignment, isResistance spot welding of high strength steels (May 2003 For steels up to 600N/mm 2 tensile strength, no additional time is normally required in the welding cycle, either in weld time itself or modifications to the welding sequence. However, slightly higher electrode forces are usually recommended to maintain a good welding current range, typically a 20 to 50% increase compared to low carbon steel.Projection welding for nut and bolt attachment
The Projection Welding ProcessNut Welding Trials in Advanced High-Strength SteelsStatic Strength CharacteristicsFatigue Strength CharacteristicsRecommendationsBoron Weld Nuts Advance Effective Use of Ultrahigh Sep 16, 2019 · Ramco has developed an innovative line of weld nuts designed to assist stamping companies and OEMs with thin, ultrahigh strength steel applications. Initially developed for boron steels, the new nut has enhanced weld projection geometry designed for extra stability during high-current welding. Many stampers have issues with adhesion of their standard weld nuts to ultrahigh