24 July 2021 Precision Alloys
4J58 Precision Alloy Steel Bar
4J58 is at room temperature to 600 ℃ temperature range, with a certain expansion coefficient of the alloy. In the ambient temperature and the expansion coefficient of steel and cast iron, basically the same, and have good processing performance. In the long-term use of dimensional stability, and have a certain degree of corrosion resistance.
4J58 Organization:
1,4 J58 phase transition temperature
2,4J58 Time - Temperature - Tissue Transition Curve
3,4J58 alloy structure: the alloy is a stable austenitic tissue.
4,4J58 grain size: The actual grain size of the alloy should be 4 to 6, in the same magnetic field does not allow three levels of grain.
Loose alloy center should be less than 1 level. The total oxide, nitride should not exceed 1 level.
4J58 process performance and requirements:
1,4J58 Formability: Alloys have good hot working and cold working properties.
2,4J58 Welding performance: Alloy has good welding performance.
3,4J58 parts heat treatment process: Parts planing, grinding process, repeated heat treatment should be repeated in order to achieve uniform organization, eliminate stress, to ensure long-term use of dimensional stability. Take a ruler as an example of its heat treatment process shown in Figure 5-1.
4,4J58 Surface treatment process: Surface treatment can be sandblasting, polishing or pickling.
5,4J58 cutting and grinding performance: Alloy has good cutting, grinding, polishing and engraving performance.
4J58 variety specifications and supply status:
1, the species classification: Shanghai Baoyu special alloy can produce a variety of seamless pipe, steel, round steel, forgings, flanges, rings, pipe, strip, wire and supporting welding consumables.
2, the delivery status: seamless pipe: solid solution + acid white, the length can be length; plate: solid solution, pickling, trimming; pipe: solid solution acid white RT% flaw detection, Bar to wrought state, the surface polished or car light; strip by cold-rolled, solid solution soft state, to the oxide skin delivery; wire to solid acid pickling pan or straight strip, solid solution straight fine grinding Light status delivery.