What is Expanite? Surface Hardening of Stainless Steel

EXPANITE® as well as SUPEREXPANITE® are patented processes for the surface hardening of stainless steel to achieve superior surface and material properties, such as high hardness, extraordinary corrosion and fatigue properties. › Read more

What is an electron beam?

The free electrons in vacuum can be accelerated and their orbits controlled by electric and magnetic fields. In this way we can form narrow beams of electrons carrying high kinetic energy, which at collisions with atoms in solids transform their kinetic energy into heat. Thanks to some specific conditions, this way of heating gives us exceptional possibilities. › Read more

What is HPGQ?

The most common definition for High Pressure Gas Quenching[/en/products/vacuum-heat-treatment/#high-pressure-gas-quench] is accelerating the rate (speed) of quenching by densification and cooling of gas. One of the reasons for the intense interest in this quenching technique is related to improved part distortion with full hardness. A critical concern is to avoid sacrifice of metallurgical, mechanical or physical properties. That is, retain the ability to transform a material to a microstructure that is similar, identical or superior to that of a known quenching medium (e.g. oil or salt). Common quench gases include nitrogen, argon and helium. Hydrogen, although excellent with respect to heat transfer, is seldom used as a quench gas due to safety considerations. › Read more

What is a vacuum furnace?

*Vacuum furnaces* are used in many applications in all industries.  A vacuum is one of the methods to protect heated steel and metal parts from the negative influence of an air atmosphere. A vacuum furnace is normally an electrically heated furnace in which a vacuum is maintained during the process. Most vacuum furnace are heated by electric resistance elements made from graphite, ceramics or metals. › Read more

What is a radiation tube?

A radiation tube is a kind of heating element. The radiation tube might be integrated with the burner or electrical heating element: › Read more

What are the advantages of a SECO/WARWICK roller hearth furnace?

Roller Hearth Furnace Systems › Read more

What is an application for a roller hearth furnace?

SECO/WARWICK designs and builds roller hearth continuous furnaces for annealing both in-process and finished tubes in ferrous, nonferrous, and stainless steel materials.  › Read more

What is causing the high dew point in my atmosphere generator?

One of the common problems encountered in generators is that of a high dew point. This could be caused by a leak in the gas cooler which is of the tube type water cooler. If it is a leaky gas cooler, the correction is obvious - repair it. If the water cooler is not leaking and it is still running a high dew point, it is possible that the generator is getting more air than indicated on the flowmeter. Sources of air infiltration into the generator are through the pump shaft, a bad bypass regulator, or loose piping. › Read more

How to find where air is infiltrating atmosphere furnaces

A problem encountered in the operation of the furnace, particularly *atmosphere furnaces*, is the infiltration of air into the furnace chamber or cooling chamber. › Read more

What is the nitriding potential?

The nitriding[sitetree_link,id=526] potential is thermodynamically defined by: › Read more

What is the fluxer?

*Fluxers * The cleaned heat exchanger is covered with a suitable layer of brazing and flux mixture prior to start of the brazing process.            *We deliver the following types of fluxers:* › Read more

What is scale?

Scale - a thick layer of metal oxides on the surface of heated parts, formed in an oxidizing atmosphere at high temperature. › Read more

What is the dew point ?

The dew point is the temperature below which the water vapor in a volume of humid air at a constant barometric pressure will condense into liquid water. Condensed water is called dew when it forms on a solid surface. › Read more

What is a furnace chain and a pair of furnace chains?

Furnace chains are high temperature resistant chains to transport a load, a fixture, a basket or a part in a furnace. Often these furnace chains are used in batch type furnaces (BT), in-out-furnaces (IO), batch integral quench furnaces (BIQ), Through-Quench furnaces (TQ), Return Through Quench furnaces (RTQ), casemaster furnaces (CM), Sealed Quench Batch furnace (SQ B and SQ ) where a pair of endless furnace chains right and left with dogs take a load from position A to position B in the furnace. Often the material mix of the chain is important, as a part of the chain remains in the hot furnace area, while the other one remains in the cold part. Naturally the cold part should do the job and pull the load from one to the other position.  › Read more

Why do we use oxygen probe?

We use oxygen probes because they enable quick regulation of the chemical constitution of the furnace atmosphere. Using the oxygen probe one can measure the amount of oxygen, which allows to calculate the carbon potential of the furnace atmosphere online. › Read more

What are heat treatment problems?

The heat treatment process is often the last or one of the last, but certainly in most cases one of the important steps in the manufacturing and production of metal parts, semi-finished metal parts and metal fore products  for the production of the before mentioned products. › Read more

What is Heat Treatment

Heat Treatment is the controlled heating and cooling of metals to alter their physical and mechanical properties without changing the product shape. Heat treatment is sometimes done inadvertently due to manufacturing processes that either heat or cool the metal such as welding or forming. › Read more