Central Arizona College

WLD 281 Welding Metallurgy, Metallography, Weld Design and Distortion Control

Credit Hours: 3
Effective Term: Fall 2019
SUN#: None
AGEC: None

Credit Breakdown: 2 Lectures, 3 Labs
Times for Credit: 1
Grading Option: A, B, C, D, F
Cross-Listed:

Description: Information and skills of basic welding metallurgy including why the HAZ get hard, how to reduce hardness, how to recognize the importance of the effects of carbon equivalent, and how various metals respond to welding. Instruction on materials and mechanical properties, and how to perform microstructure and hardness analysis on samples. Students will prepare metallurgical analysis reports with photos and hardness tests. Also covered is information and skills in designing a weldment to minimize or reduce distortion. Prerequisite: Welding Technology AAS degree or passing score on Threshold Skill Test. Corequisites: 4 other program courses and the capstone project.

Prerequisites: Welding Technology AAS degree or passing score on Threshold Skill Test.

Corequisites: 4 other program courses and the capstone project.

Recommendations: Welding qualification, welding courses, computer, word processing, English, writing, and math skills.

Measurable Student Learning Outcomes
1. (Comprehension Level) Explain or summarize the temperature points marking the metallurgical phase changes common to the metallurgy of carbon steels as shown in the Iron-Carbon Phase diagram. (CSLO 2,3) 2. (Application Level) Apply elements or aspects of carbon steel metallurgy to avoid the high hardness in the heat affected zone and to avoid cracking and/or in-service weld failures in carbon steel welds. (CSLO 2,4) 3. (Comprehension Level) Explain or summarize how to apply preheat and how to maintain the interpass temperatures as detailed in a welding procedure. (CSLO 2) 4. (Synthesis Level) Effectively apply mechanical properties of steels and fundamentals of weld design when developing welding procedures and fabricating sound weldments. (CSLO 2,3,4) 5. (Application Level) Apply basic elements or aspects of welding metallurgy in both stainless steels and aluminum alloys when developing welding procedures and in the fabrication of sound weldments. (CSLO 2) 6. (Synthesis Level) Explain, summarize, and prepare metallurgical test samples for analysis and for obtaining factual information for analysis reports and weld qualifications. (CSLO 2,3) 7. (Synthesis Level) Effectively apply concepts of welding metallurgy, mechanical properties, and welding design in preventing or correcting distortion of weldments. (CSLO 2,3,4)
Internal/External Standards Accreditation
This program intends to interface with Weld-Ed, a National Resource Center that supports schools to train the pipeline of welders and welding technicians for industry, and specifically to ensure the students meet the Weld-Ed definition of a welding technician. Also intends to interface with the American Welding Society to use some of their training, codes, standards and texts to ensure the training meets a national standard or level of excellence.