review of heat treating seminar. (heat treating).
The group held several seminars and round tables.
Topics discussed include induction heating basics, Power selection, induction coil design and application, induction heating problems and solutions, quenching process and distortion control, unique applications, and many other issues.
Jim konevski, director of electrical engineering for induction heating, started the workshop with an induction heating power supply: Why are there so many options? (Don L.
Relentless, research and development by Vice President of the group, industry toheat, Inc. ).
In order to meet the heating requirements of various induction heating tasks, different power supply types and models have been developed.
The specific heating to be completed specifies the frequency, power level, duty cycle, and other induction heating coil parameters, including Coil voltage, current, and power factor (\"Q\").
System requirements, including the size, shape and position of the heating coil relative to the power supply, will greatly affect the packaging design.
Power supply: flexible tuning, reliability and maintenance (
Stephen Baskerville, R & D manager, Radyne, USAK. ).
The application field of induction heating has been greatly developed in the past 40 years.
Tracking this growth is the evolution of the core units of the system ---
The change of induction heating power supply not only reflects the progress of technology, but also reflects the progress of application.
This discussion points out that the key requirements of the power supply will also change as the application changes.
Therefore, modern induction power supplies must provide a high degree of flexibility, reliability and manageability.
Design and Application of induction coil (
Micah Black, head of inductor design, inducto heat, Inc. ).
Induction can be used in many applications.
Static, scan, progressive, and pulse are the four basic heating modes.
Each heating method has a specific induction coil design associated with it.
Because in the introduction of the basic knowledge of induction heating, some induction heating coils seem complicated.
He pointed out that induction heating is an area of material processing and seems to be art like science.
In essence, induction hardening is a controlled process that converts some of the inherent properties of the metal into a more desirable state.
His informative presentation provided a valuable basis for subsequent technical meetings.
The following summary is only a few of the more than 15 seminars and round table discussions held in October. 17-
Clearwater in FL, 2001.
At random, the theme of coil design is sometimes left to \"experts\" in the field \".
This session discusses the basic coil shapes and styles, and how and why they work best in specific cases.
Process monitoring and advanced control (
Ray Cook, vice president of engineering, industry toheat, Inc. ).
Early techniques for measuring process parameters can be as simple as a pressure switch or a double-set point meter that will indicate whether the parameters exit the acceptable range during the cycle.
For less critical variables, this is still the most cautious way to design a system.
A circuit in Machine Control asks and checks the time of the variable within the normal working range.
For variables such as flow and temperature, this involves the designer\'s best guess of the time required for flow or temperature stability before making an acceptance/rejection measurement.
The obvious next step in the purist monitoring and control process of machine control technology is from observing that the parts are not hardened correctly to taking corrective actions in case of problems.
For example, when the value drops to the control setting point, the use of a servo control valve will allow the controller to increase or decrease the quenching flow or pressure.
While technically feasible, the problem for most manufacturers is usually, \"This high
Are customers willing to pay for technical hardware?
\"This discussion explores some of the more cautious approaches that utilize some of the techniques available to achieve consistent, reliable results. Non-
Rotation induction quenching of crankshaft (
Dr. Tang, no love.
Valery Rudnev, Glen desmiye, Roland Lanford and habb Medhani--
Inductoheat, Inc. )
A revolutionary new patented induction heating
Heat treatment technology has been introduced in the automotive industry
Handle the crankshaft.
This technique involves heat treatment of the crankshaft journal using a fixed inductor rather than a cumbersome method of conventional crankshaft hardening process.
In the traditional method, the inductor must follow the offset rotation of the rod shaft neck, and when the crankshaft rotates, a large amount of motion of the sensing fixture is required.
In the methods described in this course, both the crankshaft and inductor remain stationary during heating and quenching, resulting in simpler and more costly
Effective operation using the improved hardness mode.
The fixed method of heat treatment without crankshaft rotation provides several additional practical benefits, including excellent reliability, durability and tightness (
In some cases, only 20% of the floor area required for the traditional process is used).
A significant advantage of this technique is the short heating time, usually 1. 5 --
4 seconds, compared to 7--
Traditional craft 12 seconds.
Because the heating time is so short, only a small amount of metal is heated and heated
Minimize affected areas.
In addition, the short heating time improves the metallurgical properties of the hardening zone by reducing the grain growth, carbon removal and oxidation of the pin! main surface.
Induction heating of gears and key components (
Madu Chatterjee, director of gear quenching and special projects, Inductoheat, Inc. ).
Before the steel gear became popular, the gear was made of wood or any material that could be formed or processed.
Nowadays, plastic, colored, ceramic and composite gears are used more every day.
Nevertheless, due to its high strength/volume ratio and ready-made availability, the main share of the market depends on gears made of steel.
The focus of this discussion is an overview of gear requirements, design and service applications, and examples of material/process alternative data.
Failure Analysis of heat treatment: whose fault? (avid A. Moore, P. E. ; Dr. Kenneth F. Packer, Ph. D. , P. E. ; aron J. Jones; Duane M. Carlson --
Packaging Engineering Co. , Ltd. )
Failure Analysis has long been a special area for metallurgical and material engineers.
Much of what metallurgical engineers have learned is intended to develop observation reasoning skills to understand the relationship between observable features and attributes or properties.
For many, the process of metallurgical fault analysis is almost an art form, because most of the analysis may be based on the ability of the analyst to identify and identify important features.
When two failed analysts come to different conclusions about the same event, the myth that the failed analysis is a t rather than science seems to be supported.
Heat-treating persons, especially independent suppliers of h in the processing service, can find themselves involved in the fault analysis business through their close relationship with metallurgical engineering practice.
The heat-treating person may just be a person with any metallurgical engineering expertise throughout the design and manufacturing process.
This discussion shows how a complete failure analysis should correctly determine whether the client\'s specification is met, rather than assigning responsibility to the parties concerned.
Polymer quenching agent for induction heat treatment application: Foundation (Dr. George E.
Totten, a senior research scientist at United carbide)
Heat treatment the polymer quenching agent is used in induction heating
More than 3 years of treatment application.
Polymer quenching agents are used to control deformation and prevent cracking of steel during induction hardening. However, there is still a general lack of knowledge about their selection, use and performance limitations.
This discussion included an overview of the chemistry of polymer quenching agents, followed by a description of how polymer quenching agents work, and finally a description of the general performance limitations in their use.
Polymer quenchants, such as PAG (
Fluid-based, has been used for many years to provide better deformation control and cracking in a variety of thermal-
The polymer works by forming a packaging film with a certain rate of reduction;
But more importantly, they promote uniform heat transfer around the part, reducing bad heat gradients and conversion gradients.
Although the polymer bench agent may experience some thermal oxidation degradation, it is easy to detect this with regular analysis.
The discussion provides extensive background and data on polymer properties and induction heating properties
The discussions at all the workshops and round tables have been a lot of hot-
Treating experts and professionals from companies across the United StatesS.
The exhibition adjacent to the discussion room provides attendees with additional information between the workshops.