A kind of steel forging and its processing method

Abstract

The invention discloses a steel forge piece and a machining method thereof. The problem that the overall performance of an austenitic stainless steel forge piece prepared through an existing machiningmethod is solved. According to the technical scheme, the steel forge piece comprises chemical components including, by mass, not larger than 0.08% of C, not larger than 2.20% of Mn, not larger than 1.50% of Si, not larger than 0.02% of P, not larger than 0.025% of S, 11%-13% of Cr, 2.00%-8.00% of Ni, 0.30%-0.60% of Mo, 1.50%-3.50% of Cu, not larger than 0.60% of Nb, not larger than 0.25% of V andthe balance Fe. The prepared forge piece has the beneficial effects of high strength, high tenacity, corrosion resistance, abrasion resistance, high weather fastness, high temperature resistance, lowtemperature resistance, high stability and the like.

Description

technical field [0001] The invention relates to the technical field of steel processing, in particular to a 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 processing performance are further improved. [000...

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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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