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post weld heat treatment

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Published: 01 August 1999
Fig. 11.12 Effects of heat treatment after explosive welding steel to steel (0.15% C). Same weld as illustrated in Fig. 11.11 except for post-welding heat treatment. (a) and (b) Heated at 650 °C for 30 min. (a) 1% nital. 100×. (b) 1% nital. 1000×. (c) and (d) Heated at 925 °C More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200295
EISBN: 978-1-62708-354-6
... welding is not recommended. In fact, low interpass temperature maximums (200-400 °F) are often used. The requirements for post-weld heat treatment are subjects of much debate, many opinions, and little data. This is due to the complexity of corrosion behavior, limited testing of cast alloys...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930311
EISBN: 978-1-62708-359-1
... treatment to impart sufficient ductility to the fusion zone ( Ref 29 ). A stress-relieving and stabilizing treatment at about 600 °C (1110 °F) is commonly used for Ti-6Al–4V weldments ( Ref 30 ). For the majority of welded aerospace structural components, a maximum post-weld heat treatment temperature...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200158
EISBN: 978-1-62708-354-6
... of up to 50% compared to an all weld design. The cast nodes are produced in steel grades which do not require post-weld heat treatment and have excellent mechanical properties. Fig. 11-2 Complex trunnion node weighing approximately 100 tons On a smaller scale “off the road” vehicles...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120039
EISBN: 978-1-62708-269-3
... annealed after welding. Weld deposits can have higher strength than the parent metal owing to microstructural differences resulting from the fast cooling rate of the weld process and some oxygen pickup. These differences can be eliminated by a high-temperature post-weld heat treatment, but stress...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270080
EISBN: 978-1-62708-301-0
... and Recommendations The tie-rod failed in a brittle manner from a poor-quality weld interface. It is preferable to use a cold-drawn low-carbon steel for the tie-rod to facilitate better welding. If, however, 0.5% carbon steel has to be used, adequate preheating and post-heat-treatment procedures must...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.9781627083591
EISBN: 978-1-62708-359-1
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930365
EISBN: 978-1-62708-359-1
... of similar composition but higher alloy content. Weld cracking is avoided by ensuring that the weld contains 5–10% ferrite. Weld decay (chromium carbide precipitation) leads to loss of corrosion resistance. Minimized by C <0.03% or add Nb. Ti (stabilized steel) and pay regard to post-weld heat treatment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200197
EISBN: 978-1-62708-354-6
... by a tempering heat treatment in which the casting is heated to within the range of 400 °F to 1350 °F as determined by the type of alloys present and the desired final mechanical properties and cooled to room temperature in air or quenchant. The heat treatment given to post-weld stress relieve a casting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930189
EISBN: 978-1-62708-359-1
... be important in the initiation and propagation of environmentally assisted cracking. The use of small weld deposits reduces the stress and thus reduces the susceptibility of environmentally enhanced cracking. It is known that postweld heat treatment can reduce stress-corrosion cracking by redistributing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
... the performance of the design process of a component. A heat-transfer model, coupling with a phase transformation model, a thermomechanical model, and a thermochemical model, is also considered. The chapter further provides information on the failure aspects of and heat treatment procedures applied to welded...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ahsssta.t53700177
EISBN: 978-1-62708-279-2
... in areas along the grain boundaries. This may lead to loss of toughness and intergranular corrosion of the steel. The sensitization effect can be minimized by reducing the carbon content of the steel. Post-heating after welding is needed to redissolve the precipitates and to relieve the stress caused...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930217
EISBN: 978-1-62708-359-1
... and postweld heat treatment (PWHT). In addition, any metallurgical and/or weldability problems associated with the HAZ characteristics will be more difficult to handle than those associated with the weld metal. Welding problems that occur in the weld metal can often be overcome by changing the welding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200369
EISBN: 978-1-62708-354-6
... has been in service. Most of the cast grades are readily weldable, however, the ease with which they can be welded depends on their chemical composition, heat treatment, and to some degree, the section thickness involved. Base metal preparation and details of welding, defect removal, and some...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 1997
DOI: 10.31399/asm.tb.wip.t65930249
EISBN: 978-1-62708-359-1
... that maximum transformation to martensite occurs. If this has not happened, then subsequent post-weld heat treatment (PWHT) immediately after welding may be ineffective, for two reasons. First, the partially austenitic structure will retain hydrogen, which can lead to hydrogen cracking problems upon eventual...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200274
EISBN: 978-1-62708-354-6
... post-weld heat treatment to restore corrosion resistance is impractical or impossible. In the case of stress corrosion attack, the presence of ferrite pools in the austenite matrix is thought to block or make more difficult the propagation of cracks ( 7 ). In the case of intergranular corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900201
EISBN: 978-1-62708-350-8
... to 20 min at a reduced temperature (540 °C, or 1000 °F) to maintain base-material hardness. This provides resistance to chip welding at the cutting edge. The SBN treatment also benefits die casting and forging dies by reducing heat checking, soldering, diffusion, and wear from molten metals ( Fig...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2006
DOI: 10.31399/asm.tb.cw.t51820001
EISBN: 978-1-62708-339-3
... and residual stress. These residual stresses can be important in the initiation and propagation of environmentally assisted cracking. The use of small weld deposits reduces the stress and thus reduces the susceptibility of environmentally enhanced cracking. It is known that postweld heat treatment can...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060429
EISBN: 978-1-62708-261-7
... treatment). A change in the proper- ping, hot spraying, or diffusion. ties of certain metals and alloys that occurs at amorphous. Not having a crystal structure; ambient or moderately elevated temperatures noncrystalline. after hot working or a heat treatment (quench angstrom. A unit of linear measure equal...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.pb.t51230001
EISBN: 978-1-62708-351-5
... of contacting atoms to form a metallic bond. The contact area determines the extent of bonding. Subsequent atom rearrangement as a consequence of post-weld heat treatment and/or stress relaxation Pressure welding is particularly effective when joining dissimilar metals. For good weldability, the softer...