Rare earth armor steel and manufacture method thereof

Abstract

The invention provides rare earth armor steel and a manufacture method thereof. Alloyed rare earth elements are distributed in an iron-based structure of the armor steel, the alloyed rare earth elements are one or multiple of the three elements, namely, cerium Ce, lanthanum La and yttrium Y, the content of the alloyed rare earth elements is controlled at 0.005 wt% to 0.080 wt% through a steelmaking feeding rare earth wire process, and through the common effect of the alloyed rare earth elements and other alloyed elements, the armor steel with the tensile strength being 1700-2200 MPa, the Brinell hardness being HB480 to HB600 and the corrosion resistance being the corrosion rate, not larger than 1.65 g / (m<2>.h), of a 96 h periodic infiltration corrosion test. The corrosion resistance is notinferior to that of 09CuPCrNiA steel. The 09CuPCrNiA steel is equivalent to ASTM A242(COR-TEN A) steel or Japan SPA-H steel or China Q355GNH steel, and therefore better application of the rare eartharmor steel to personal and armored vehicle bullet protection and bullet protection projects of fixed or movable structures is facilitated.

Description

technical field [0001] The invention relates to armor steel technology, in particular to a rare earth armor steel and a manufacturing method thereof. Alloying rare earth elements are distributed in the iron-based structure of the armor steel, and the alloying rare earth elements are cerium Ce, lanthanum La, and yttrium Y One or more of these elements, in terms of mass percentage wt%, the alloying rare earth element content is controlled at 0.005-0.080 through the steelmaking process of feeding rare earth wire, and the alloying rare earth element and other alloying elements The combined effect of the formation of the armor steel can achieve the tensile strength of 1700-2200MPa, the Brinell hardness of HB480-HB600, and the corrosion resistance of the 96-hour periodic infiltration corrosion test. , the corrosion resistance is not inferior to 09CuPCrNiA steel, the 09CuPCrNiA steel is equivalent to ASTM A242 (COR-TEN A) steel, or Japanese SPA-H steel, or Chinese Q355GNH steel, whic...

AI Technical Summary

Problems solved by technology

The resulting problems: the scale of steel with high Si content is not easy to fall off, which increases the difficulty of sandblasting and rust removal before coating, and has a negative impact on the low temperature toughness and formability of the material; in addition, the cost of Cu as an alloying element is high

Induction heating is used for heat treatment in production. There are many types and high content of alloying elements in steel, especially adding about 1% W, which is economical.

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