( ) cracking is generally encountered during postweld heat treatment (PWHT) of steels
A: Reheat
B: Stress relief
C: Hydrogen induced
D: Solidification
A: Reheat
B: Stress relief
C: Hydrogen induced
D: Solidification
A,B
举一反三
- HTLA steels are susceptible to reheat cracking because they are with a lot of (). A: carbides B: hydrogen C: sulphur D: manganese
- HTLA steels are susceptible to reheat cracking because they contain a lot of () A: carbides B: H C: S D: P
- To avoid cracking of the casting, there should be ____________ for shrinkage during solidification
- HTLA steels are susceptible to reheat cracking because they contain a lot of () A: carbides B: H C: S D: P E: 2-3-2 F: 期末
- The common heat treatment on steels such as 65Mn and 60Si2Mn is . A: quenching + low temperature tempering B: quenching + medium temperature tempering C: quenching + high temperature tempering D: normalizing
内容
- 0
During heat treatment of steel, austenite transforms into martensite by A: annealing B: austenitizing C: quenching D: normalizing
- 1
Cambodians generally rise early to enjoy the cool of the morning, and often rest during the heat of the early afternoon.
- 2
Three-edged needle is mainly used for treatment of clinical symptoms such as qi stagnation, blood stasis, and excessive heat, which are mainly manifested by pain, fever, and swelling. It is generally not used for the treatment of emergency. ( )
- 3
Casting solidification is generally divided into three types:__________, __________ and __________.
- 4
（） is induced due to temperature variation along slab thickness. A: thermal stress B: primary stress C: shear stress D: curling stress