题目内容

______ cracking is generally encountered during postweld heat treatment (PWHT) of steels.

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Liquation cracking temperature range (LCTR) represents a measure of______ susceptibility.

Specialty tests to evaluate susceptibility to various metallurgically related defects,such as solidification cracking or hydrogen cracking, should be conducted in the alloy development or selection stage.

The danger always exists that if the self-restraint test is () severe than the actual application, test results may not predict performance.

A. more
B. not more

With carbon equivalent ( ), the steel has a low tendency to harden and cold cracking?

A. less than 0.40%
B. less than 0.50%
C. less than 0.60%
D. less than 0.80%

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