Short-process bainite hot working die and preparation method thereof

Abstract

The invention relates to a preparation method of a short-process bainite hot-working die, which comprises the following steps: designing die steel components: 0.50 to 0.60 percent of C, 0.20 to 0.25 percent of Si, 1.00 to 1.50 percent of Mn, 2.10 to 3.00 percent of W, 3.50 to 5.00 percent of Mo, 0.50 to 1.00 percent of V, 0.60 to 1.10 percent of Co, less than or equal to 0.02 percent of P, 0.01 to 0.10 percent of RE, more than 3.0 percent of [RE] / [S], less than 0.004 percent of [RE] * [S] and the balance of Fe and inevitable impurities. Through design and adjustment of components of the die steel, the bainite structure die steel material subjected to forging and controlled cooling is low in hardness and can be directly machined and machined, the bainite of the die steel material is subjected to secondary strengthening effect through primary tempering treatment after forging and machined and machined, and the die steel has excellent hardness, wear resistance and toughness; and the composite material has excellent comprehensive mechanical properties. By utilizing the characteristic, the process of annealing softening between mechanical rough machining and quenching hardening after mechanical rough machining in the prior art is omitted, so that the production cycle of the hot-working die is shortened, and the energy consumption and the production cost are reduced.

Description

technical field [0001] The invention relates to the technical field of mold manufacturing, in particular to a short-flow bainite hot working mold and a preparation method thereof. Background technique [0002] As the cornerstone of the manufacturing industry, the mold industry plays a very important role in the development of modern industries. Die steel, especially hot work die steel, has a very wide range of applications in industrial manufacturing, such as hot forging dies, die casting dies and hot work dies. [0003] Traditional hot work molds often require more than a dozen production processes from mold material manufacturing to finished molds. Such as: mold material smelting - casting - annealing treatment - forging - forging annealing - mold machining (rough machining) - mold heat treatment - mold finishing - mold nitriding treatment, etc. [0004] In the manufacturing process of the mold, the mold has to undergo multiple heating and cooling heat treatments to adju...

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Problems solved by technology

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a short-flow bainite hot-working mold and its preparation method, which solves the problems of long manufacturing cycle of the current hot-working mold, many heat treatment processes, serious time-consuming and energy-consuming problems, etc. technical problem

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