Abstract: The present disclosure relates to an eccentric extreme high-speed-rate laser hybrid manufacturing method for a rotary engineering component. By positioning an extreme high-speed-rate laser direct energy deposition machining head at a predetermined eccentric distance, the damage caused by reflected light to the machining head is effectively reduced, to prolong a service life of the machining head. Also a conventional form of a molten pool in extreme high-speed-rate laser direct energy deposition can be changed, namely from a “falling” form caused by a high-speed movement and a gravity to a “climbing” form. Thus, in extreme high-speed-rate laser direct energy deposition machining, the molten pool has a longer time to fully contact a surface of the rotary engineering component to form desirable bonding performance.

Abstract: Provided is a mono-tin organic compound for the synthesis of sucrose-6-carboxylate. The compound has a structure shown in formula (1), wherein R1, R2, and R3 each are independently selected from the group consisting of C1 to C8 linear or branched saturated alkyl, C2 to C8 linear or branched unsaturated alkyl, C3 to C8 substituted or unsubstituted saturated cycloalkyl, C3 to C8 substituted or unsubstituted unsaturated cycloalkyl, and C6 to C12 aryl or substituted aryl; and R4 is selected from the group consisting of C1 to C6 linear or branched saturated alkyl and C6 to C12 aryl or substituted aryl.