Shielding gas-argon - hydrogen mixtures, Mechanical Engineering

Assignment Help:

Argon - Hydrogen Mixtures


Argon - hydrogen mixtures are employed in special cases, such as mechanised welding of light gauge stainless steel tubing, in which the hydrogen does not cause adverse metallurgical effects such as porosity and hydrogen induced cracking. By Increased  of welding speeds can be achieved in almost direct proportion to the amount of hydrogen added to argon because of the high  arc voltage. However, the amount of hydrogen that can be added varies with the metal thickness and type of joint for each particular application. Excessive hydrogen will cause porosity. Argon - hydrogen mixtures are limited to use on stainless steel, nickel - copper and nickel base alloys. The most commonly used argon - hydrogen mixture contains 15 % hydrogen which is used for mechanised welding of tight butt joints in stainless steel up to 0.062 in. (1.6 mm) thick. For manual welding,a hydrogen content of 5 % is sometimes preferred to obtain cleaner welds. 


Related Discussions:- Shielding gas-argon - hydrogen mixtures

Kinematic and dynamics, In Figure P4.2 , ?1 = 200 rad/s cw and a1 = 4000 ra...

In Figure P4.2 , ?1 = 200 rad/s cw and a1 = 4000 rad/s2 cw, Find the acceleration of points B, C, and D and the angular acceleration of link 2?

Laser-induced breakdown spectroscopy , Laser-induced breakdown spectroscopy...

Laser-induced breakdown spectroscopy (LIBS) is a type of spectroscopy that uses plasma generated by a laser pulse. A schematic of a LIBS system is shown in the figure. The laser is

Ultrasonic examination, Q. Ultrasonic Examination? Ultrasonic examinati...

Q. Ultrasonic Examination? Ultrasonic examination, UT and the acceptance criteria shall be in accordance with the Code and performed in accordance with written procedures. W

Grinder-tool and equipment , Grinder: Grinders are used to sharpen the cut...

Grinder: Grinders are used to sharpen the cutting edges of the tools. They are basically fast rotating grinding wheels carried at one or two ends of a shaft. The grinding wheel ar

Boiler, Working, specification construction of Lancashire boiler

Working, specification construction of Lancashire boiler

Evaluate the fourth force, The resultant of four vertical forces is a coupl...

The resultant of four vertical forces is a couple moment 30 Nm acting counter clockwise. Three of the four forces are shown in fig given below. Evaluate the fourth force.

Classification based on mode of welding, Classification Based on Mode of We...

Classification Based on Mode of Welding Manual welding: In this welding the entire welding operation is performed and controlled by hand. Here, there are two movements involv

Determine the number of bolts required, The following specification is used...

The following specification is used for the design of a flanged coupling between two coaxial shafts: Speed: 650rpm Power transmitted: 550 kW Bolt Diameter: 12 mm Pit

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd