Asm Handbook Volume 4 Heat Treating Free Download Hit: Enhance Your Knowledge and Skills in Heat Tre

It features thousands of documents in PDF format, including material data sheets from Alloy Digest and other ASM publications; heat treating data sheets from the Heat Treater's Guides; and time-temperature curves, creep curves, and fatigue curves from ASM atlas publications. All of the PDF files are organized by type of material and are fully searchable.

Asm Handbook Volume 4 Heat Treating Free Download Hit

Download Zip

- " comprise a chemical composition of a maraging or precipitation-hardening steel suitable for... to which sulfur has been added within the range of 0.05 to 0.30 weight percent... and age hardening said article to working hardness by heat treating and cooling" (claim 10).

The application solved this problem by hot isostatic pressing (HIPping) the resulphurized P/M hot work tool steel article to full density and heat treating the article. The improved mechanical performance and properties of the hot work steel article are shown in Figures 4, 5, 6b and 6c.

The technical background to the present application is amply reflected by the chapter "P/M Tool Steels" given in document D1 which is a Standard text book in the field of metallurgy and represents the closest prior art. As set out in the introductory part of D1 on page 780, first column, the P/M tool steels (in general) offer several distinct advantages over conventional tool steels produced by I/M, including a very fine microstructure with a uniform distribution of carbides and non-metallic inclusions and the absence of segregations. With particular respect to "hot-work tool steels", the P/M route is said to offer a greater toughness and a better thermal fatigue life. More specifically, the section "P/M Hot-Work Tool Steels" starting on page 789 discloses the P/M route to be an alternative method of producing segregation-free hot-work tool steels of both standard and improved compositions and offering the ability to produce near-net shape die cavities directly during HIPping which minimizes material input and subsequent machining (cf. D1, page 789, last paragraph of columns 1, 2 and 3). Since a fully dense porous free structure (100% density) of the article is achieved after HIPping, there is no need for an additional thermomechanical treatment such as hot forging, hot rolling or hot extrusion (cf. D1, page 780, column 2, lines 4 to 8). As confirmed by document D1, page 790, column 3, lines 1 to 7, the die is after HIPping ready for heat treatment and finish machining, which means that no further thermomechanical treatment changing the microstructure after HIPping is envisaged in this process. As an example, the mechanical properties of the martensitic steel type P/M H13 after a standard heat treatment (1010C/1h - air cool - 593C/2+2h; cf. D1, page 789, column 3, 2nd full paragraph) are given in D1, Tables 8 and 10 (hardness: 47.5-48.1 HRC and toughness: Charpy V-notch impact strength: 10. ft-lbf). However, Table 1 on page 781 and the section "Hot-Work Tool Steels" of document D1 do not explicitly mention the powder metallurgy processing of hot-work tool steels to which increased amounts of sulphur were added in order to improve their machinability.

2ff7e9595c