我厂4~#汽轮机容量为2×10~5kW,投产之前进行了一系列完善化处理,其中为解决原高压缸内导流环的脱落,在汽缸内增加了导流环轴向定位面积,在汽缸内原导流环定位槽的位置上,沿辐射线方向均匀地焊上八个定位块(亦称定位键)。该机于1981年投产,在1987年大修中发现高压缸内四个轴向导流环定位块焊缝上出现了裂纹。 I plant 4 ~ # turbine capacity of 2 × 10 ~ 5kW, put into operation before a series of improved treatment, in order to solve the original high-pressure cylinder diverting ring off in the cylinder to increase the axial flow guide ring positioning area, In the position of the original guide ring positioning groove in the cylinder, eight positioning blocks (also called positioning keys) are uniformly welded along the radiation direction. The aircraft put into operation in 1981, overhaul in 1987 found that high-pressure cylinder four axial flow block ring positioning block weld cracks.