CN104084513B - The cogging forging method of 1Cr10Co6MoVNb steel - Google Patents

Abstract

The invention discloses a kind of cogging forging method of 1Cr10Co6MoVNb steel, the steps include: that getting single weight is that in the 1Cr10Co6MoVNb steel ingot casting loading heating furnace of 1.2 ~ 1.8 tons, charging temperature is 740 ~ 750 DEG C, is incubated 100 ~ 120 minutes; Be warming up to 940 ~ 950 DEG C with the firing rate of 60 ~ 80 DEG C/h again, be incubated 120 ~ 150 minutes; 1140 ~ 1150 DEG C are heated to again with the firing rate of 100 ~ 120 DEG C/h; In a fire, carry out hammer cogging to this steel, first divide and press down jumping-up 3 ~ 4 times, each volume under pressure is 30 ~ 40mm; Divide and press down pulling 6 ~ 8 times, each volume under pressure is 10 ~ 20mm; Last jumping-up is round as a ball, initial forging temperature >=1140 DEG C of this process, final forging temperature >=950 DEG C.This method reduce cogging difficulty, improve billet yield, shorten the production cycle, enhance productivity.The method is mainly used in the cogging forging of the forging such as aero-engine high-pressure compressor dish, rotor blade.

Description

The cogging forging method of 1Cr10Co6MoVNb steel

Technical field

The present invention relates to a kind of stainless cogging forging method, particularly relate to a kind of cogging forging method of 1Cr10Co6MoVNb steel.

Background technology

1Cr10Co6MoVNb steel is a kind of martensite type stainless steel, there is higher heat resistance, heat endurance and non-oxidizability, and there is good fatigue strength, creep-resistant property, there is lower notch sensitivity, can use at a higher temperature, be generally used for manufacturing the important spare parts such as aero-engine high-pressure compressor dish, rotor blade, spacer ring and sealing ring.

1Cr10Co6MoVNb steel is higher due to Co content, can promote the generation of carbide and enrichment on crystal boundary, add the difficulty of hot-working cogging.Usual needs adopt many fire, carry out forging and stamping cogging.The method production efficiency is low, the cycle is long, and iron loss is large, and manufacturing cost is high.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of employing and divides three sections of mode of heatings be incubated, and realizes the cogging method to 1Cr10Co6MoVNb steel One-time forging, reduces cogging difficulty, improve billet yield, shorten the production cycle, enhance productivity.

For solving the problems of the technologies described above, the cogging forging method of 1Cr10Co6MoVNb steel of the present invention, its technical scheme comprises the following steps:

(1) get 1Cr10Co6MoVNb steel ingot casting, single weight is 1.2 ~ 1.8 tons;

(2) loaded in heating furnace by 1Cr10Co6MoVNb steel ingot casting, charging temperature is 740 ~ 750 DEG C, is incubated 100 ~ 120 minutes; Be warming up to 940 ~ 950 DEG C slowly, uniformly with the firing rate of 60 ~ 80 DEG C/h again, be incubated 120 ~ 150 minutes; 1140 ~ 1150 DEG C, in heating process are heated to uniformly again, temperature difference≤20 DEG C of 1Cr10Co6MoVNb steel ingot casting each several part with the firing rate of 100 ~ 120 DEG C/h.

(3) adopt One-time forging, first pressure hammer, chopping block are preheated to 100 ~ 120 DEG C; Inserted by 1Cr10Co6MoVNb steel ingot casting on the chopping block under pressure hammer and carry out jumping-up, this process is divided and is pressed down for 3 ~ 4 times, and each volume under pressure is 30 ~ 40mm; Pull out, divide and press down for 6 ~ 8 times, each volume under pressure is 10 ~ 20mm again; Last jumping-up is round as a ball, initial forging temperature >=1140 DEG C of this process, final forging temperature >=950 DEG C.

Compared with prior art, beneficial effect of the present invention is as follows:

The cogging forging method of 1Cr10Co6MoVNb steel of the present invention, the mode of heating of 1Cr10Co6MoVNb steel cogging forging is heat stepwise, first 1Cr10Co6MoVNb steel is loaded in the heating furnace of 740 ~ 750 DEG C and be incubated, the heart portion of 1Cr10Co6MoVNb steel and surface are heated evenly, 940 ~ 950 DEG C are heated to again with the firing rate of 60 ~ 80 DEG C/h, 740 ~ 750 DEG C to 940 ~ 950 DEG C is the temperature range of martensite generation structural transformation in 1Cr10Co6MoVNb steel, and the firing rate of 60 ~ 80 DEG C/h can be good at the efficiency controlling martensitic structure transformation, and 1Cr10Co6MoVNb steel plasticity in this temperature range is poor, the firing rate of 60 ~ 80 DEG C/h can prevent temperature stress excessive and cause distortion, cracking.When temperature reaches 940 ~ 950 DEG C, the plasticity of 1Cr10Co6MoVNb steel increases, raising heating-up temperature that can be suitable; 940 ~ 950 DEG C to 1140 ~ 1150 DEG C is also that the solid solubility temperature of alloying element in 1Cr10Co6MoVNb steel is interval, the alloying elements such as the Co in steel can be made all to incorporate in crystal grain with the firing rate of 100 ~ 120 DEG C/h, decrease the production of carbide, reduce the cogging difficulty of 1Cr10Co6MoVNb steel, make 1Cr10Co6MoVNb steel ingot casting can complete cogging forging in a fire.

During jumping-up, the volume under pressure of employing is 30 ~ 40mm, both ensure that 1Cr10Co6MoVNb steel ingot casting chink did not occur, and in turn ensure that production efficiency.

The method adopts One-time forging to carry out cogging to 1Cr10Co6MoVNb steel ingot casting, and technique is simple, and workable, reliable in quality, billet yield is high.

Detailed description of the invention

Implement the cogging forging method of 1Cr10Co6MoVNb steel of the present invention, need to provide the equipment such as high-temperature heater, forcing press, manipulator.Detailed description of the invention is as follows:

The main chemical elements content (percentage by weight) of 1Cr10Co6MoVNb steel is: C content 0.06% ~ 0.11%, containing Mn amount 0.60% ~ 1.15%, si content 0.10% ~ 0.70%, containing Cr amount 9.80% ~ 11.20%, ni content 0.20% ~ 0.80%, containing Mo amount 0.50% ~ 1.00%, V content 0.10% ~ 0.35%, containing Nb amount 0.20% ~ 0.45%, containing Co amount 5.00% ~ 7.00%, containing B amount 0.004% ~ 0.012%, leaded wastewater 0.010% ~ 0.35%, containing S amount≤0.020%, P content≤0.020%, surplus is Fe.

The cogging Forging Technology step of 1Cr10Co6MoVNb steel is as follows:

Get 1Cr10Co6MoVNb steel ingot casting, be of a size of Φ 600mm × 780mm (being about 1.5 tons); It is in the heating furnace of 750 DEG C that 1Cr10Co6MoVNb steel ingot casting is loaded furnace temperature, is incubated 120 minutes; Be warming up to 950 DEG C slowly, uniformly with the firing rate of 60 DEG C/h again, be incubated 150 minutes; 1150 DEG C, in heating process are heated to slowly, uniformly again, temperature difference≤20 DEG C of 1Cr10Co6MoVNb steel ingot casting each several part with the firing rate of 100 DEG C/h.

Adopt One-time forging, first pressure hammer, chopping block are preheated to 120 DEG C; Inserted by 1Cr10Co6MoVNb steel ingot casting on the chopping block under pressure hammer and carry out jumping-up, this process is divided and is pressed down for 4 times, and each volume under pressure is 30mm; Pull out, divide and press down for 6 times, each volume under pressure is 20mm again; Last jumping-up is round as a ball, initial forging temperature >=1140 DEG C of this process, final forging temperature >=950 DEG C.

Claims (1)

1. a cogging forging method for 1Cr10Co6MoVNb steel, is characterized in that, comprise the following steps:

(1) get 1Cr10Co6MoVNb steel ingot casting, single weight is 1.2 ~ 1.8 tons;

(2) loaded in heating furnace by 1Cr10Co6MoVNb steel ingot casting, charging temperature is 740 ~ 750 DEG C, is incubated 100 ~ 120 minutes; Be warming up to 940 ~ 950 DEG C slowly, uniformly with the firing rate of 60 ~ 80 DEG C/h again, be incubated 120 ~ 150 minutes; 1140 ~ 1150 DEG C, in heating process are heated to uniformly again, temperature difference≤20 DEG C of 1Cr10Co6MoVNb steel ingot casting each several part with the firing rate of 100 ~ 120 DEG C/h;

(3) adopt One-time forging, first pressure hammer, chopping block are preheated to 100 ~ 120 DEG C; Inserted by 1Cr10Co6MoVNb steel ingot casting on the chopping block under pressure hammer and carry out jumping-up, this process is divided and is pressed down for 3 ~ 4 times, and each volume under pressure is 30 ~ 40mm; Pull out, divide and press down for 6 ~ 8 times, each volume under pressure is 10 ~ 20mm again; Last jumping-up is round as a ball, initial forging temperature >=1140 DEG C of this process, final forging temperature >=950 DEG C.