LR DH32 oil skimmer steel, Shipbuilding steel plate refers to hot-rolled steel for the manufacture of ship structures produced in accordance with the requirements of the LR DH32 oil skimmer steel construction society. Often used as a special steel ordering, scheduling, sales, a ship including ship plates, steel and so on.
Quenching is a heat treatment process in which steel parts are heated to above the critical temperature, and after proper heat preservation, the parts are quickly cooled to room temperature in water or oil, so that martensite transformation occurs. The hardness of the quenched LR DH32 oil skimmer steel increases sharply. Quenching is to prepare the organization for adjusting and improving the performance of LR DH32 oil skimmer steel during tempering, while tempering determines the performance and life of the workpiece.
The qualified flat steel has sufficiently high high temperature strength and high temperature plasticity. Therefore, LR DH32 oil skimmer steel flat steel is not only required to have high enough normal temperature and instantaneous high temperature tensile strength and plasticity, but also long-term strength and long-term plasticity to ensure long-term safe work at high temperatures, especially under creep leakage conditions. The product thickness is 8-50mm, width 150-625mm, length 5-15m。
The strengthening mechanisms in metals mainly include solid solution strengthening, dislocation strengthening, fine grain strengthening, and second phase (precipitation and dispersion) strengthening. Alloying elements have the most significant strengthening effect on steel in the quenched and tempered state, because it makes full use of all four strengthening mechanisms. Martensite is formed during quenching, and carbides are precipitated during tempering, resulting in a strong second phase strengthening and greatly improving toughness. Therefore, obtaining martensite and tempering it is the most economical and effective comprehensive strengthening method for LR DH32 oil skimmer steel.
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