Method for performing restoration on metal surface crack by utilizing wave key
A wave and crack technology, applied in the field of wave keys, can solve the problems affecting the normal use of the machine, damage, crack expansion, etc., and achieve the effects of reliable mechanical performance, short operation cycle and money saving.
Inactive Publication Date: 2019-11-05
ZHEJIANG OCEAN UNIV
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Problems solved by technology
[0002] Some large castings, such as large and medium-sized diesel engine bodies, large ship propellers, etc., if there are cracks in some parts, although they will not affect the use, but if they are not repaired in time, the cracks will gradually expand until they are damaged due to vibration and other reasons over time, affecting normal use of the machine
Method used
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Embodiment 1
[0034] A high-strength, heat-resistant and corrosion-resistant stainless steel is composed of 0.5wt% nickel, 19wt% chromium, 1wt% manganese, and the rest is iron. The yield strength of the stainless steel is 400MPa, the elongation is 45%, and the compressive strength is 600MPa.
Embodiment 2
[0036] A high-strength heat-resistant and corrosion-resistant stainless steel, its composition is nickel 1.5wt%, chromium 21wt%, manganese 2wt%, the rest is iron, the yield strength of the stainless steel is 470MPa, the elongation is 52%, and the compressive strength is 700MPa.
Embodiment 3
[0038] A high-strength heat-resistant and corrosion-resistant stainless steel, its composition is nickel 1wt%, chromium 20wt%, manganese 1.5wt%, and the rest is iron. The yield strength of the stainless steel is 440MPa, the elongation is 49%, and the compressive strength is 660MPa.
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Abstract
The invention provides a preparation method of a high-strength heat resistant and corrosion resistant stainless steel wave key. Nickel, chromium and manganese are placed into a feeding port of a vacuum die-casting machine by mass percentage, and are melted into melt in a melting device; cut small block 304 stainless steel plates and the melt are injected into an extruding mold together; and the formed wave key is obtained after extruding forming. The preparation method aims at the problems existing in an existing offshore oil and gas storing and transporting device lock, the wave key is produced and machined by utilizing a number 304 stainless steel material, an offshore oil and gas storing and transporting device is restored, the original mechanical performance of equipment is guaranteed,the equipment is enabled to have certain corrosion resistance, the restoration period is short, and cost is low.
Description
technical field [0001] The invention relates to the technical field of wave bonds, in particular to a method for repairing metal surface cracks by using wave bonds. Background technique [0002] Some large castings, such as large and medium-sized diesel engine bodies, large ship propellers, etc., if there are cracks in certain parts, although they will not affect the use, but if they are not repaired in time, as time goes by, the cracks will gradually expand until they are damaged due to vibration and other reasons. normal use of the machine. The wave key is a repair method that produces plastic deformation in the groove by means of snap-fit connectors, and reconnects the damaged parts or cracks of the machine body into a whole through the action of mechanical extrusion. It is suitable for the repair of large castings. Moreover, for offshore oil and gas storage and transportation equipment, it is easily affected by corrosion problems caused by various reasons in the ocean...
Claims
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Patent Timeline
Login to view more IPC IPC(8): C22C38/58C22C38/04B22D17/14B22D17/02B23P6/04
CPCB22D17/02B22D17/14B23P6/04C22C38/04C22C38/58
Inventor 王亚宁葛绍亮纪丽丽宋文东郭健蔡璐
Owner ZHEJIANG OCEAN UNIV
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