Spalling and Preventive Measures of Cast Hot-Strip Roll;

It has been analyzed the causes for both heavy surface spalling and "side spalling" of back-up roll for hot strip mill.

The paper analyses the spalling of 5Cr forging cold work rolls in the CSP Plant of Baotou Steel Corp.

The main reasons of CSP work roll flaking in Lianyuan Steel are the uneven slab temperature,uneven roll cooling temperature and the rolling accident.

Results show that the leading mechanisms of both alloys are shallow flaking under 2.

The failure types of roll such as flaking, fracture, crack etc are described.

The analysis shows that the beforehand physical defects and carbonization may be the reason for barrier's desquamation.

By means of chemical analysis,rigidity test,metallographic examination and fracture analysis,it was found that the main reason for the backup roll's desquamation was possible crack headspring which was offered by impurity in interior tissue.

Some common types of work roll desquamation in rolling of medium and heavy plate are introduced.

Improvement of stripping of spray coatings on aluminum alloy articles;

The moisture-induced damage occurs primarily because of stripping the asphalt from the aggregates.

Based on the concept of data mining and by extracting useful information from historical temperature data,the time and process of oxide skin exfoliation of final reheater in Zhujiang Power Plant are derived;the conclusion accords with the results of field test.

Focusing on the mechanism of creation and development and rules of oxide layers, the approaches are discussed to retard and relax the exfoliation from the wall.

Talking about the peeling reasons and dealing of the concrete surface;

The main working surface(320×2000 mm) of the roller occurred peeling and cracking after external grinding.

The main inactive forms of core-rod are heat fatigue and touching fatigue peeling.