Designed in direct consultation with PTC to work hand-in-hand with the latest release of PTC Creo software (formerly known as Pro/ENGINEER), PTC CREOTM PARAMETRIC 3.0 provides step-by-step instructions to help readers understand the uses, assets, attributes, and new capabilities of the redesigned software. This user-friendly guide is the first book on the market on PTC Creo 3.0 and provides all the information, screen shots, and detailed illustrations necessary for effective use of the software as an engineering design tool. The book is enhanced by a free companion website featuring online lessons, online lectures, and a link to the free downloadable PTC Creo Student Edition software. Important Notice: Media content referenced within the product description or the product text may not be available in the ebook version.
This book intended for shop use tries to familiarize the reader with the peculiari ties of a hardening method which due to its many advantages is now in use,many shops. A general knowledge of the principles of hardening and heat treating is presumed. Introduction 1. The name of the process. Flame hardening is a method derived from the old quench hardening and is used for the surface hardening of heat treatable steels. Flame hardening is so named in analogy to flame cutting as the use of a flame is a distinctive feature of this process as opposed to the use of a furnace. 2. Characteristics of flame hardening. In flame hardening the area to be 6 hardened is heated with a burner of large heat capacity (approx. 0.5 · 10 kcaljhr/ meter of flame lengths or 50,000 BTUfhr/inch of flame length) supplied with a mixture of fuel gas and oxygen. The hardening temperature is thus reached in so short a time at the surface that a heat jam is created, that is, more heat is supplied to the surface than can be dissipated to the interior of the workpiece. As the querr ehing takes place immediately after the heating the penetration of the heat to greater depth is prevented and only the outer layer subject to wear is hardened. The core of the workpiece remains unaffected by this heat treatment in cantrast to the other hardening methods where the entire piece is through heated in a furnace.