A compression-resistant and corrosion-resistant steel forging and its processing method

Abstract

The invention discloses a steel forging resistant to compression and corrosion, and a machining method thereof. The problem of low comprehensive performance of austenitic stainless steel forgings manufactured with an existing machining method is solved. According to the technical scheme, the steel forging resistant to compression and corrosion comprises, by weight, no more than 0.08% of C, no morethan 0.50% of Mn, no more than 0.50% of Si, no more than 0.04% of P, no more than 0.03% of S, 11%-12.5% of Cr, 7.50%-9.50% of Ni, 0.40%-0.60% of Mo, 1.50%-2.50% of Cu, no more than 0.60% of Nb, no more than 0.25% of V and the balance Fe. The prepared steel forging has the advantages of high strength and toughness, corrosion and wear resistance, high weatherability, high and low temperature resistance, high stability, etc.

Description

technical field [0001] The invention relates to the technical field of steel processing, in particular to a compression-resistant and corrosion-resistant steel forging and a processing method thereof. Background technique [0002] At present, petrochemical and coal chemical industries are developing rapidly, and the scale of equipment tends to be larger. The weight of hydrogenation reactors in petroleum and coal-fired mining machinery and petrochemical core equipment has exceeded the kiloton level. Gradually, domestic mining machinery and reactors with plate-welded structures are being upgraded to forge-welded structures. [0003] The precipitation hardening treatment of stainless steel is generally described as three stages. The specific heat treatment steps are similar to martensitic steel, carbon steel and alloy steel. In fact, precipitation hardening stainless steel is improved on the basis of ordinary stainless steel, and its corrosion resistance, toughness and proces...

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Problems solved by technology

[0005] The above improves the corrosion resistance of forgings, but the comprehensive performance of forgings is low; at the same time, from the perspective of current forging processing technology, stainless steel forgings in mechanical equipment such as oil mining machinery, rail transportation technology industry or military products, etc. The balance of yield strength, tensile strength and corrosion resistance is relatively low, the overall effect is not high, and there are improvements

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