Metallographic Preparation and Analysis of Carburized Steel

Many steel components can benefit from surface hardening, which improves wear resistance while maintaining a part’s toughness. Surface hardening can be accomplished by nitriding, induction hardening, or even shot peening; but carburizing remains the most viable choice for many applications. In this webinar, Dave Coulston will explain what carburizing is, and how it is accomplished. Dave will then describe the important chemical, metallurgical and mechanical property results of a carburizing treatment. This will be followed by a discussion of what is important in each step in the metallographic preparation of carburized steel, and microscopic evaluation of the carburized layer.

Instrumentation: Metallography
Presented by: Dave Coulston, Corporate Metallurgist, LECO Corporation
Date: October 7, 2020 | Time: 10:00 am EST (GMT -04:00) | REGISTER TODAY

Analysis of Carburized Steels by Glow Discharge Spectroscopy: Carbon in the Hardened Case and More

Precise measurement of carbon in carburized steel can be challenging due to changing concentrations throughout the hardened case of a sample.  With a number of different approaches available to determine carbon in these samples, glow discharge spectroscopy (GDS) stands out because of its ability to repeatably measure carbon in a region that is spatially discrete from organic carbon on the near surface and carbon in the original base material.  The presentation will include comparisons to other means of measuring carbon, discussion of the relationship to microhardness measurements, and characterization of the materials with both GDS compositional depth profiles and bulk analyses for carbon and other key alloying elements. 

Instrumentation: GDS900, AMH55
Presented by: Andrew Storey, Field Sales Specialist, LECO Corporation
Date: October 14, 2020 | Time: 10:00 am EST (GMT -04:00) | REGISTER TODAY

Determination of Moisture in Welding Flux

The American Welding Society (AWS) method A4.4M:2001 (R2006) “Standard Procedures for Determination of Moisture Content of Welding Fluxes and Welding Electrode Flux Coatings” outlines the appropriate methodology for sample preparation and analysis for this application. Moisture content in the flux can be correlated to the hydrogen content in the weld metal, and to varying degrees, the potential for hydrogen embrittlement. Clearly, determination of moisture content in welding flux is necessary to understand the quality of the final weld. Join us to learn how the LECO RC612 can be utilized to quantify the moisture present in welding flux samples, as outlined by AWS A4.4:2001 (R2006).

Instrumentation: RC612
Presented by: Adam Darling, Analytical Chemist, LECO Corporation
Date: October 21, 2020 | Time: 10:00 am EST (GMT -04:00) | REGISTER TODAY

Basic Metallographic Analysis of Welds

When a product has two or more pieces of metal put together, there is almost certainly a weld involved. The quality of the product hinges on the quality of the weld. While there are many destructive tests that can determine the quality of some weld factors, such as tensile testing or Charpy impact testing, there is nothing more informative or thorough than a metallographic exam. Learn from Dave Coulston what benefits can be derived from the different weld examinations and how best to prepare welds for such analyses, as well as typical weld measurements and some examples of automated hardness testing of welds.

Instrumentation: Metallography
Presented by: Dave Coulston, Corporate Metallurgist, LECO Corporation
Date: October 28, 2020 | Time: 10:00 am EST (GMT -04:00) | REGISTER TODAY