surface bolt

Addition of chamfering shape on seating surface of joint bolt at atf cooler pipe area.

倒棱增加物的塑造在自动制冷管的范围内、接头螺栓的座套表面.

Thus, under the same bolt tension, reduce narrow smooth surface after the compressive stress will increase.

这样, 在螺栓张力相同的情况下, 缩小后的窄光滑面的压紧应力就会增大.

Addition of chamfering shape on seating surface of joint bolt atf cooler pipe area.

倒棱增加物的塑造在自动制冷管的范围内、头螺栓的座套表面.

Third, add to a small copper bolt on the inner measurement tube's glass wall above 5~ 10 mm the liquid surface in which Beckmann Thermometer's mercury bulb was immerged.

三是在浸没贝克曼温度计水银球的液面上方5~10mm处的常规内测玻璃壁上添加一个小铜螺栓。

Result indicates that surface decarburization in thread root of bolt and microcrack in plastic deformation layer of thread surface are the main causes to reduce seriously the strength of bolt and result the bolt rupture failture.

结果表明，螺栓的螺纹根部表面脱碳，螺纹表面塑性变形层中存在微裂纹，表面脱碳和微裂纹严重降低了螺栓的强度，导致螺栓断裂失效。