Forging process and equipment for high-temperature-resistant and high-pressure-resistant stainless steel ring

Abstract

The invention relates to the technical field of forging and discloses forging process and equipment for a high-temperature-resistant and high-pressure-resistant stainless steel ring. The forging process comprises the following process steps of step 10, blanking, step 20, heating before upsetting, step 30, upsetting, step 40, punching, step 50, heating before ring milling, step 60, ring milling andstep 70, slow cooling. The stainless steel ring is transferred in each forging workstage and between workstages by using a forging manipulator, the front end of the forging manipulator is provided with an infrared thermometer for online measuring of the temperature of a blank and a flame heating device for online heating and heat preservation of the blank, and the forging manipulator turns on theflame heating device in the process of transferring the blank to carry out heating and heat preservation on the blank of the stainless steel ring. By the adoption of the forging process and equipment, good control over the temperature of the blank of the stainless steel ring in the forging process is realized, so that the forging quality is improved, and the forging energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of forging, in particular to a forging process and equipment for high temperature and high pressure resistant stainless steel rings. Background technique [0002] Stainless steel rings are widely used in the industrial field. A typical stainless steel ring is made of 1Cr13 stainless steel forgings (equivalent to 410 stainless steel in the A473 series in the American ASME standard and SUS410 stainless steel in the Japanese standard). High pressure and other advantages, can be used in internal combustion engines, nuclear power steam turbines and other occasions. [0003] Since 1Cr13 stainless steel belongs to martensitic stainless steel, it has the characteristics of low plasticity, high deformation resistance, narrow forging temperature range, and poor thermal conductivity. Defects such as cracks appear during ring rolling. [0004] In the prior art, the forging of 1Cr13 stainless steel rings has the follow...

AI Technical Summary

Problems solved by technology

[0005] First, due to the narrow forging temperature range (usually the initial forging temperature is 1150°C, and the final forging temperature is 850°C), the temperature during the forging process can easily drop below the final forging temperature, resulting in the need for multiple reheating, resulting in increased energy consumption and making Production efficiency is greatly reduced

[0006] The second is that during the forging process, the blanks of stainless steel rings need to be transferred between various forging equipment, such as from the press to the heating furnace, from the heating furnace to the ring rolling machine, etc. The blanks of the stainless steel rings are not in the transfer process. Insulation measures can easily lead to rapid cooling of the blank surface of stainless steel rings and surface cracks

[0007] The third is that the cooling of 1Cr13 stainless steel rings after forging is often air-cooled, and its cooling speed is fast, which is prone to delayed cracks (cracks that will only occur after a long period of time), which may cause serious quality problems to the subsequent operation of the equipment. accident hazard

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