How to Flame Blue Small Gun Parts for a Beautiful Finish | MidwayUSA Gunsmithing

Published on August 17, 2011
Duration: 1:03

Larry Potterfield, founder of MidwayUSA, demonstrates the flame blueing technique for small gun parts like screws, aiming for a decorative finish. The process involves meticulous preparation, including polishing, followed by controlled heating with a propane torch to achieve specific temper colors, culminating in an oil quench. This expert guide highlights the importance of precise temperature control for achieving a desirable blue finish on firearm components.

Quick Summary

Flame blueing small gun parts involves meticulous polishing to a mirror finish, followed by controlled heating with a propane torch to approximately 600°F to achieve a deep blue color. The part is then immediately quenched in oil. Tools like locking forceps and abrasive cloths are essential for this decorative gunsmithing technique.

Chapters

  1. 00:00Introduction to Flame Blueing
  2. 00:12Part Preparation Techniques
  3. 00:24Tools and Materials for Flame Blueing
  4. 00:34The Heating and Color Change Process
  5. 00:44Quenching and Final Result

Frequently Asked Questions

What is the process for flame blueing small gun parts?

Flame blueing involves preparing the part by polishing it to a high shine, then heating it evenly with a propane torch until it reaches the desired blue color (around 600°F), and immediately quenching it in oil. Re-polishing and re-flaming are possible if the color is unsatisfactory.

What tools are needed for flame blueing gun screws?

Essential tools include a propane torch for heating, locking forceps to hold the small parts, an oil quench container, and abrasive materials like polishing cloths or strips, often used with a power drill for efficient polishing.

At what temperature does steel turn blue when flame blueing?

Steel typically turns a deep blue color during flame blueing at approximately 600 degrees Fahrenheit. The process starts with straw colors around 400°F, progressing through brown before reaching the desired blue.

How do you prepare gun parts for flame blueing?

Preparation is crucial and involves meticulous polishing of the part to a mirror finish. Any displaced metal on screw heads should be peened, and the slot refiled if necessary, ensuring a clean surface for even heat application and color development.

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