High-hardness 3J40 alloy bar for air valve and manufacturing method of high-hardness 3J40 alloy bar

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: 2021-10-22
JIANGSU TOLAND ALLOY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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  • High-hardness 3J40 alloy bar for air valve and manufacturing method of high-hardness 3J40 alloy bar
  • High-hardness 3J40 alloy bar for air valve and manufacturing method of high-hardness 3J40 alloy bar
  • High-hardness 3J40 alloy bar for air valve and manufacturing method of high-hardness 3J40 alloy bar

Examples

Experimental program
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Effect test

Embodiment 1

[0032] In this example, two batches of high-hardness 3J40 alloy bars for gas valves were produced, all of which went through batching→vacuum induction melting→casting electrodes→hot annealing→electrode surface treatment→protective atmosphere electroslag smelting→steel ingot diffusion annealing→forging blanking→ Grinding → forging finished product → solution heat treatment → straightening and polishing → non-destructive inspection.

[0033] The steel ingots of the examples obtained by smelting were subjected to homogenization annealing to obtain steel ingots with uniform composition and good plasticity. The chemical composition of the steel ingots obtained is shown in Table 1 below.

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Abstract

The invention relates to a high-hardness 3J40 alloy bar for an air valve and a manufacturing method of the high-hardness 3J40 alloy bar. The grain size of the high-hardness 3J40 alloy bar for the air valve is smaller than the grade 5, the grade difference is within grade 2, and strip grains do not exist; and meanwhile, the bar is stable in mechanical property, and the hardness HV is larger 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 rod for an air valve 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 thermal processing. There is no precedent for successful production of large-scale alloy rods. [0003] Valve alloys are mainly used in the manufacture of internal combustion engine valves and other parts. The use environment is very harsh, and the hardness of the alloy material is required to be higher. High hardness means that the material has better wear resistance. The existing Nimonic 80A val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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
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