1. From the perspective of packaging
The quality of stainless steel wire rope is mainly reflected in the packaging. After the stainless steel wire rope arrives, the sheave is deformed, damaged or loose, causing the stainless steel wire rope to roll, squeeze, scratch or have no moisture-proof measures on the sheave, causing serious corrosion and affecting users.
The packaging quality of the stainless steel wire rope is as follows: during loading and unloading, the sheave breaks, the cloth is not properly torn, the sling cannot be disassembled, the wooden shaft is broken, the stainless steel wire rope is broken, the pine wood shaft is broken, the rope is loose, the strength of the sheave is insufficient, the strength of the sheave is insufficient Insufficient, after the break, the warehouse is seriously out of order, the warehouse is in chaos, and the warehouse is in chaos. Management is in turmoil.
2. Surface damage
The surface damage of the stainless steel wire rope is generally referred to as the surface damage caused by external contact, such as bruises, bruises, hanging, scratches or nails, but the plastic deformation caused by the crimping die, pre-transformer or roll die during the manufacturing process does not belong to The extent of surface damage.
Broken: The stainless steel wire rope is deformed after the wire rope is broken, the steel strand is crushed, and the diameter of the wire rope is deformed, resulting in uneven twisting distance, increased thigh gap, and exposed hemp core, generally caused by operation drop and external impact.
Bruises: After a bruise, a hard curved and protruding numb core is exposed, which is usually caused by transportation.
Trauma: Uneven tightening of the strands after the strands have been hung; heavy hanging and discarding of rolled ropes, usually caused by the production process.
Scratches: This type of damage is a defect caused by shipping or handling. It is usually caused in transit.
Nail damage: Internal damage caused by a nail on the end of the rope. The phenomenon caused by nail fixing is usually not a quality problem.
Scratches: Scratches on the outer wire caused by hard objects can loosen the outer wire of the wire, usually caused by shipping.
3. Surface rust (floating rust)
Surface oxidation of stainless steel wire rope (partial or overall). Reasons for rusting (floating rust) on the surface of new steel wire ropes:
First of all, acid, alkali, salt and other substances remain on the surface of the steel wire during production.
Secondly, the grease of the wire rope contains too much acid, alkali or water.
Third, there is insufficient oil pollution in the production of steel wire rope.
Fourth, the moisture-proof measures of the packaging are improper (due to the long-distance transportation of imported steel wire ropes) and the impregnation of harmful gases.
New ropes are allowed to rust slightly (especially stainless steel wire ropes where the user does not need oil), but the manufacturer is responsible for rust spots or pitting or flax surfaces caused by friction.
4. Galvanizing defects
Galvanized stainless steel wire rope Surface cracking, shedding, zinc accumulation, zinc scars and exposed steel are galvanized defects. The main reason for galvanizing defects is that the surface of galvanized steel wire has not been washed off, and the galvanizing process is not strictly controlled, such as the purity of zinc liquid, temperature, equipment operation speed and stability, improper handling of zinc slag, etc. .
poor oiling
Poor oil coating is the lack of unevenness of the impregnating agent and lubricant of the steel wire or hemp core on the surface of the stainless steel wire rope. The national standard for stainless steel wire ropes and wire ropes stipulates that "unless the user requires otherwise, there must be no place on the surface of the steel wires in the wire rope that are not coated with lubricant." This is also a measure to improve the quality of stainless steel wire ropes and ropes.
Generally speaking, there are two types of wire rope oils used by stainless steel wire rope and wire rope manufacturers: one is hemp core oil (impregnating agent), and the other is external coating agent (surface grease).
The main reasons for poor oiling are: First, the quality of domestic oil products is not up to standard, but the oil immersion method is improper. For example, when the stainless steel wire rope passes through the heating oil tank, the stop time is longer and the oil temperature is too high
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