Iron-based alloy powder for manufacturing diesel engine piston ring groove applied to low-speed and heavy-load ships through laser

Abstract

The invention discloses iron-based alloy powder for manufacturing a diesel engine piston ring groove applied to low-speed and heavy-load ships through laser. The iron-based alloy powder is characterized by comprising the following components in percentage by weight: 0.1-0.2% of C, 14.0-17.0% of Cr, 1.0-1.3% of Si, 1.4-2.0% of Ni, 0.2-0.5% of Mn, 0.8-1.2% of Mo, 1.0-1.5% of B and the balance of Fe. Through the iron-based alloy powder, a high-hardness and wear-resistant material suitable for the piston ring groove is designed by analyzing different element characteristics in the material; the powder contains high amount of chromium and proper amount of boron, silicon, boron, nickel and molybdenum, so that the effect of uniformly refining the structure is achieved; the hardness and the wear resistance of a cladding layer can be improved; the requirements of the diesel engine piston ring groove on the comprehensive properties such as corrosion resistance and wear resistance and the like of the cladding layer are met.

Description

technical field [0001] The invention relates to a material for laser manufacturing of ship power components, in particular to an iron-based alloy powder for laser manufacturing of low-speed heavy-duty marine diesel engine piston ring grooves. Background technique [0002] The diesel engine is the main source of ship power, and the piston is one of the main moving parts of the diesel engine, which is an integral part of the combustion chamber, and it bears a huge task. When the piston is working, it is subjected to great mechanical stress and thermal stress, and at the same time it is also subject to wear. The wear of the upper and lower end faces of the piston ring is mainly due to the mechanical grinding of the upper and lower end faces by the hard residue in the oil and fuel and the dust particles mixed in from the atmosphere, which is essentially abrasive wear. Especially for low-speed heavy-duty diesel engines burning heavy oil, the viscosity of heavy oil is very high, ...

AI Technical Summary

Problems solved by technology

These mixed alloy powders have problems such as uneven mixing, large particle size differences, different melting points, compositional deviations, and different expansion coefficients, which lead to defects such as cracks, pores, segregation, unstable performance, and difficult machining in actual cladding.

[0006] Therefore, researching and developing a new iron-based alloy powder for laser cladding with corrosion resistance and wear resistance and stable performance is a major topic in the technical field. After searching and checking by the applicant: there is no such aspect at home and abroad related reports