A kind of high-hardness 3j40 alloy bar material for air valve and its manufacturing method
A technology for alloy rods and manufacturing methods, which is applied in the field of high-hardness 3J40 alloy rods for air valves and its manufacturing field, which can solve problems such as not being able to meet the requirements of high-end customers, achieve excessive stress prevention, uniform billet structure, and reduce residual The effect of stress
Active Publication Date: 2022-05-27
JIANGSU TOLAND ALLOY
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Problems solved by technology
The existing Nimonic 80A valve steel material is increasingly unable to meet the requirements of high-end customers
Method used
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Embodiment 1
[0032] In this example, two batches of high-hardness 3J40 alloy bars for gas valves were prepared, which were all processed through batching → vacuum induction melting → pouring electrode → hot annealing → electrode surface treatment → protective atmosphere electroslag melting → steel ingot diffusion annealing → forging and blanking → Grinding → forging finished products → solution heat treatment → straightening and polishing → nondestructive testing.
[0033] The steel ingot of the embodiment obtained by smelting is subjected to homogenization annealing to obtain a steel ingot with uniform composition and good plasticity. The chemical compositions of the obtained steel ingots are shown in Table 1 below.
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Abstract
The invention relates to a high-hardness 3J40 alloy rod for an air valve and a manufacturing method thereof. The grain size of the high-hardness 3J40 alloy rod for an air valve is finer than 5 grades and the grade difference is within 2 grades, and there is no strip grain; At the same time, the mechanical properties of the bar are stable, and the hardness HV is greater than or equal to 370.
Description
technical field [0001] The invention relates to the field of manufacturing nickel-based superalloy materials, in particular to a high-hardness 3J40 alloy bar for gas valves and a manufacturing method thereof. Background technique [0002] 3J40 is a Ni-Cr-based alloy material. On the one hand, due to its high Cr content and Al content, the alloy has the characteristics of high hardness and good wear resistance; therefore, it is widely used in shaft tip parts such as mechanical instruments. On the other hand, the alloy material has poor thermoplasticity and is difficult to form by hot forming, and there is no precedent for successful production of large-sized alloy bars. [0003] Valve alloys are mainly used in the manufacture of internal combustion engine valves and other components. The use environment is very harsh, and the hardness of the alloy material is higher. High hardness means that the material has better wear resistance. The existing Nimonic 80A valve steel materi...
Claims
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IPC IPC(8): C22C19/05C22F1/10C22B9/18C22C1/02
CPCC22C19/058C22F1/10C22B9/18C22C1/023
Inventor 毛福祥束文武梁小刚王林涛张建国
Owner JIANGSU TOLAND ALLOY