The causes of scratch on the bottom surface of sheet,long or short length of shearing were analyzed,and the corresponding improvement measures were put forward.

The main two types of defects are surface scratch and skin pinhole.

According to the strict request of cord steel wire rod on decarburization,scale,metal- lographic structure,mechanical properties and surface scratch,rolling technology of the B grade cord steel wire rod of Angang is established.

By improving controlling precision of heating-up temperature of steel billet,optimizing wire laying temperature,coil diameters,roller bed speed and Jialing equipment opening degree,surface scratching caused by rolling,coil collecting,packing,loading and unloading,stacking and transporting can be decrea.

Prediction of surface damage for Al_2O_(3s)f/2A12 composites by liquid infiltration-extrusion process

It is pointed out by the brittle fracture appearance observation of 80 steel wire rod and microstructure analysis that the plastic distortion of basal metal and dislocation adding at surface damage position are the main cause of wire drawing breaking.

Surface damages of Te solvent and Bridgman grown HgCdTe wafers have beenstudied with X-ray reflection topography.

Under the condition of instant high temperature of grinding, the metal surface of work piece creates a very thin oxide, it is called grinding surface burning.

Arithmetic research on surface defect detecting system for the cold-rooled steel strip;