WJ TOC 2006-06-toc
 WELDING JOURNAL - June 2006, Volume 85, Number 6
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WJ Cover June 2006
June 2006

FEATURES

Controlling Heat Treatment of Welded P91
Modified 9Cr-1Mo, commonly referred to as P91, is widely used in the power industry because of its superior proper- ties at elevated temperatures. P91 get its favorable strength and toughness properties from its microstruc- ture. The desired microstructure can only be obtained using material with a well-balanced chemical analysis and proper heat treatment. Heat treatment is an especially critical step during the manufacturing and
fabrication of P91.
P. de Smet and H. van Wortel

Plasma Arc Cutting Offers Savings to Concrete
Bedrock Stone, Inc., is a highvolume concrete recycling facility that sends out anywhere from 200 to 400 truckloads of finished products per day. The company, located in the bustling Turnpike Corridor section of Kearny, N.J., is one of the busiest Class B concrete recycling facilities in the region. The company recycles hundreds of incoming truckloads
of brick, concrete, block, asphalt, and dirt, which is used in road bases, foundations, and construction sites.
S. Hidden

Dry Hyperbaric Welding of Subsear Pipelines
The expansion of the oil fields in the North Seaw has been a driving force behind development of remotely contolled hyperbaric GTA welding of subsea pipelines.
 O. M. Akselsen et al.

Orbital GTAW Boosts Production of Leak-Free Tubing
Leaks have long been considered to beinherent to industrial hydraulic systems, but recent safety and environmental concerns have made it imperative to explore alternative joining technologies that could produce leak-free assemblies. In 2001, Iracroft Ltd., a specialist in the manufacture of rigid tube assemblies for highpressure pneumatic and hydraulic applications, received a request from a major customer for a regular supply of tube assemblies. 
B. K. Henon

Laser Cutting Helps Create New Defense Machinery
As enemy attack technology advances, becoming more effective and lethal, U.S. defense systems need to be constantly ready to react. General Dynamics Land Systems (GDLS) is at the forefront in the effort to protect the lives of U.S. troops overseas. As a leading government contractor, Land Systems operates the United States’ only main battle tank production facility in Lima, Ohio, as well as satellite plants across the country. It also plays an integral role in the U.S. Army’s core product development and modernization plans.
 


Titanium Emerges as New Seawater Piping for Navy Vessels
Grit blasting, or the roughening of the substrate to be thermal sprayed, is as important as the spraying itself. It cleans the surface and roughens the substrate to form an anchor tooth pattern to improve the coating adhesion. The measurement and control of the surface roughness pattern need to be better monitored and controlled for thermal spray coatings. This article is based on my experience working for a manufacturer of grit blast equipment. It looks at what is common practice, current writings, and recommended procedures to improve this practice.
E. R. Sampson 

Joining Pipe with the Hybrid Laser-GMAW Process: Weld Test Results and Cost Analysis
Grit blasting, or the roughening of the substrate to be thermal sprayed, is as important as the spraying itself. It cleans the surface and roughens the substrate to form an anchor tooth pattern to improve the coating adhesion. The measurement and control of the surface roughness pattern need to be better monitored and controlled for thermal spray coatings. This article is based on my experience working for a manufacturer of grit blast equipment. It looks at what is common practice, current writings, and recommended procedures to improve this practice.
E. R. Sampson 




WELDING RESEARCH SUPPLEMENT

Mechanical Behaviors of resistance Spot Welds during Pry-Checking Test (.pdf)
The effects of material type, part thickness, wedge prying angle, pitch distance, and weld button size on checking sensitivity were investigated.
C. L. Tsai et al.

The Relationship between Boron Content and Crack Properties in FCAW Eposited Metal (.pdf)
The susceptibility of deposited weld metal to cold cracking as a function of boron content was evaluated.
H. W. Lee



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Washington Watchword

Press Time News

Editorial

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Letters  to the Editor

Aluminum Q&A

Brazing Q&A

New Products

AWS Financial Report

Coming Events

Navy Joining Center

Welding Workbook

Society News

Tech Topics

Guide to AWS Services

New Literature

Personnel

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Advertiser Index

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