聚氨酯保溫管的淬火介質(zhì)采用水基單介質(zhì)或馬氏體等溫分級(jí)淬火油淬火可使聚氨酯保溫管獲得優(yōu)良的性能,并明顯減小淬火畸變和開(kāi)裂傾向。聚合物水溶性淬火劑應(yīng)按照鋼件的淬透性、工件質(zhì)量、形狀和工件的技術(shù)性能要求等作合理的選擇。馬氏體等溫分級(jí)淬火油適用于中等和高淬透性大口徑聚氨酯保溫管的淬火冷卻,可用于開(kāi)式槽、閉式槽或密封箱式爐中的淬火槽等場(chǎng)合。

　　The quenching medium of polyurethane heat preservation pipe can be quenched by water based single medium or martensite isothermal step quenching oil. The polymer water-soluble quenching agent should be selected reasonably according to the hardenability of steel, the quality of the workpiece, the shape and the technical performance of the workpiece. Martensite isothermal graded quenching oil is suitable for quenching and cooling of medium and high hardenability large-bore polyurethane insulation pipes, and can be used for quenching and cooling of open groove, closed groove or sealed box furnace.

　　通常,大口徑聚氨酯保溫管熱處理后的組織和性能主要決定于大口徑聚氨酯保溫管的淬火冷卻,同時(shí)淬火也會(huì)導(dǎo)致鋼件畸變甚開(kāi)裂,因此鋼的淬火冷卻是熱處理的關(guān)鍵工序。隨著低碳經(jīng)濟(jì)的發(fā)展,在大力提倡減排和發(fā)展綠色熱處理的當(dāng)今,聚氨酯保溫管的淬火冷卻正愈益受到人們的重視。大口徑聚氨酯保溫管的淬火介質(zhì)比較常用的是淬火油和水基淬火劑。

　　Generally, the structure and performance of large-diameter polyurethane insulation pipe after heat treatment are mainly determined by the quenching and cooling of large-diameter polyurethane insulation pipe. With the development of low carbon economy, the quenching and cooling of polyurethane insulation pipe is paid more and more attention when energy saving and emission reduction are advocated and green heat treatment is developed. Quench oil and water - based quench agent are commonly used as quench media for large diameter polyurethane insulation pipe.

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