Flame Hardening Steel Process

Plus by using robotic flame hardening and our newest advanced robotic induction hardening we can.

Flame hardening steel process.

Wait until the steel turns cherry red in color. Heat is applied to the part being hardened using an oxy acetylene or similar gas flame on the surface of the steel being hardened and heating the surface above the upper critical temperature before quenching the steel in a spray of water. It is a surface hardening process in which a thin surface section of a component of hardenable steel is heated rapidly by direct application of high tempe rature flame to a temperature above its upper critical temperature i e it is austenitized and then the component is quickly quenched in water or oil transforming austenite to mar tensite while the. This creates a case of martensite on the surface.

This process is applied to selected metal surfaces of carbon and alloy steels cast and ductile irons and some stainless steels followed by an appropriate quenching method. Flame hardening is performed on parts made of mild steels alloy steels medium carbon steels and cast iron. Penna flame leads the industry in using advanced robotics capabilities to precisely and consistently flame harden or induction harden steel parts to your specifications this process improves wear resistance and increases the longevity of the part. The second part of the process known as annealing involves reheating the steel and re cooling it.

Flame hardening is similar to induction hardening in that it is a surface hardening process. Flame hardening is a surface hardening process used on medium carbon mild or alloy steels such as 1045 4140 4340 or cast irons to produce a hard wear resistant surface case on the part. Flame hardening is a rapid economical method for selectively hardening specific areas on the surface of a part. Flame or induction hardening are processes in which the surface of the steel is heated very rapidly to high temperatures by direct application of an oxy gas flame or by induction heating then cooled rapidly generally using water.

Flame hardening sometimes begins with a preheat operation depending on the alloy and degree of machining. If dropped or struck hard it could actually shatter. This first part of the process changes the molecular structure of the steel and makes it hard but brittle. Flame hardening steel involves heating the steel and then cooling it.

Process of flame hardening 4140 other steel grades of machined parts and stampings. When the steel is a bright cherry red about 1 400 f 760 c then it s been heated enough to strengthen the steel. The actual temperature of the steel depends on the carbon content inside. The metals are heated to temperatures to their austenization temperature causing the surface to change while the core remains unchanged and soft.

The process of flame hardening. Watch for the color of the steel to change as it gets hotter. Below is an outline of the process that follows thereafter.