Injection molded alloy material and processing method

Abstract

This application provides an injection molded alloy material and a processing method. The injection molded alloy material includes the following components: carbon (C) occupying ≤0.10% of a total weight of the alloy material, nickel (Ni) occupying 4.5-8.5% of the total weight of the alloy material, chromium (Cr) occupying 5.5-9.5% of the total weight of the alloy material, molybdenum (Mo) occupying 4.5-7.5% of the total weight of the alloy material, cobalt (Co) occupying 13.0-18.0% of the total weight of the alloy material, vanadium (V) occupying ≤1.0% of the total weight of the alloy material, and a remaining component of iron (Fe).

1 . An injection molded alloy material, comprising the following components: carbon (C) occupying ≤0.10% of a total weight of the alloy material, nickel (Ni) occupying 4.5-8.5% of the total weight of the alloy material, chromium (Cr) occupying 5.5-9.5% of the total weight of the alloy material, molybdenum (Mo) occupying 4.5-7.5% of the total weight of the alloy material, cobalt (Co) occupying 13.0-18.0% of the total weight of the alloy material, vanadium (V) occupying ≤1.0% of the total weight of the alloy material, and a remaining component of iron (Fe). 
     
     
         2 . The injection molded alloy material according to  claim 1 , comprising the following components: carbon (C) occupying ≤0.02% of a total weight of the alloy material, nickel (Ni) occupying 5.5-6.5% of the total weight of the alloy material, chromium (Cr) occupying 8.5-9.5% of the total weight of the alloy material, molybdenum (Mo) occupying 5.5-6.5% of the total weight of the alloy material, cobalt (Co) occupying 14.5-15.5% of the total weight of the alloy material, and a remaining component of iron (Fe). 
     
     
         3 . The injection molded alloy material according to  claim 1 , comprising the following components: carbon (C) occupying ≤0.08% of a total weight of the alloy material, nickel (Ni) occupying 4.5-5.5% of the total weight of the alloy material, chromium (Cr) occupying 7.5-8.5% of the total weight of the alloy material, molybdenum (Mo) occupying 4.5-5.5% of the total weight of the alloy material, cobalt (Co) occupying 13.0-13.5% of the total weight of the alloy material, and a remaining component of iron (Fe). 
     
     
         4 . The injection molded alloy material according to  claim 1 , comprising the following components: carbon (C) occupying ≤0.08% of a total weight of the alloy material, nickel (Ni) occupying 6.5-7.5% of the total weight of the alloy material, chromium (Cr) occupying 8.5-9.5% of the total weight of the alloy material, molybdenum (Mo) occupying 6.5-7.5% of the total weight of the alloy material, cobalt (Co) occupying 15.5-16.5% of the total weight of the alloy material, and a remaining component of iron (Fe). 
     
     
         5 . A processing method for an injection molded alloy material, comprising:
 preparing an alloy material powder, wherein the alloy material powder comprises the following components: carbon (C) occupying ≤0.10% of a total weight of the alloy material powder, nickel (Ni) occupying 4.5-8.5% of the total weight of the alloy material powder, chromium (Cr) occupying 5.5-9.5% of the total weight of the alloy material powder, molybdenum (Mo) occupying 4.5-7.5% of the total weight of the alloy material powder, cobalt (Co) occupying 13.0-18.0% of the total weight of the alloy material powder, vanadium (V) occupying ≤1.0% of the total weight of the alloy material powder, and a remaining component of iron (Fe);   mixing, comprising: preparing an injection feed;   mixing the alloy material powder and a polymer binder in a kneader, and obtaining a feed after mixing;   performing injection molding by using an injection molding machine and an injection mold, comprising pouring the feed after mixing into the injection molding machine for injection molding, to obtain a green body;   removing a polymer binder;   performing degreasing on the green body;   sintering and performing sintering densification on the green body by using a sintering device;   shaping the green body; and   performing heat treatment on the green body.   
     
     
         6 . The processing method according to  claim 5 , wherein a granularity specification of the alloy material powder comprises: a laser granularity D50:5-20 μm, and a tap density ≥4.20 g/cm 3 . 
     
     
         7 . The processing method according to  claim 5 , wherein the method further comprises: pouring the alloy material powder and the polymer binder into a Σ-type kneader for mixing according to a volume ratio of 1.2:1-2.3:1, wherein a mixing temperature is 160-210° C., and a mixing time is 1-4 h. 
     
     
         8 . The processing method according to  claim 5 , wherein the method further comprises: pouring the alloy material powder and the polymer binder into a Σ-type kneader for mixing according to a volume ratio of 1.27:1-1.78:1 in step 2, wherein a mixing temperature is 160-210° C., and a mixing time is 1-4 h. 
     
     
         9 . The processing method according to  claim 5 , wherein removing the polymer binder comprises: performing acid catalyst catalytic degreasing or solvent degreasing treatment on the green body to remove the polymer binder, wherein a degreasing temperature is 120-130° C., a catalytic time is 1-10 h; and a catalytic medium is nitric acid or oxalic acid, and a protective atmosphere is nitrogen. 
     
     
         10 . The processing method according to  claim 5 , wherein the sintering comprises:
 thermal degreasing, comprising increasing a temperature in a furnace chamber from a room temperature to 500-800° C., and preserving the temperature at 500-800° C. for 30-180 minutes; and   heating the temperature in the furnace chamber from 500-800° C. to 1200-1400° C., and preserving the temperature at 1200-1400° C. for 60-360 minutes, wherein an atmosphere is vacuum, a protective atmosphere is argon, and a partial pressure of the argon is 10-50 KPa.   
     
     
         11 . The processing method according to  claim 5 , wherein the shaping comprises performing cold shaping on a sintered product. 
     
     
         12 . The processing method according to  claim 5 , wherein the heat treatment comprises solution treatment and aging treatment. 
     
     
         13 . The processing method according to  claim 12 , wherein the solution treatment comprises: heating a temperature in a furnace chamber from a room temperature to 800-1100° C., and preserving the temperature at 800-1100° C. for 30-180 minutes, wherein an atmosphere is vacuum; and after temperature preserving is completed, using a high-pressure inert gas to rapidly cool the furnace chamber to a temperature below 100° C., wherein the inert gas is nitrogen or argon, and a pressure is >6 bar. 
     
     
         14 . The processing method according to  claim 12 , wherein the aging treatment comprises: heating a temperature in a furnace chamber from a room temperature to 400-600° C., and preserving the temperature at 400-600° C. for 60-360 minutes, wherein an atmosphere is vacuum, and the furnace temperature is cooled after temperature preserving is completed. 
     
     
         15 . The processing method according to  claim 12 , wherein the heat treatment further comprises subzero treatment. 
     
     
         16 . The processing method according to  claim 15 , wherein the subzero treatment comprises: performing cryogenic insulation at a temperature lower than −90° C., and a time of the cryogenic insulation is greater than 2 h.