文章信息/Info

Title:

Study on Quality Stability of High-Quality Mn-Cr Automotive Gear Steel

文章編號(hào):

1674-3962(2025)03-0303-06

作者:

何肖飛; 郭濤; 孫鴻平; 陳武; 曹紅福

1. 鋼鐵研究總院有限公司 特殊鋼研究院，北京 100081 2. 江陰興澄特種鋼鐵有限公司研究院，江蘇 江陰 214429 3. 鋼研納克檢測(cè)技術(shù)股份有限公司，北京 100081

Author(s):

HE Xiaofei;  GUO Tao;  SUN Hongping;  CHEN Wu;  CAO Hongfu

1. Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China 2. Research Institute, Jiangyin Xingcheng Special Steel Works Co., Ltd., Jiangyin 214429, China 3. NCS Testing Technology Co., Ltd., Beijing 100081, China

關(guān)鍵詞:

齒輪鋼; 質(zhì)量穩(wěn)定性; 成分; 淬透性; 帶狀組織

Keywords:

gear steel;  quality stability;  component;  hardenability;  banded structure

分類號(hào):

TG142.1

DOI:

10.7502/j.issn.1674-3962.202303021

文獻(xiàn)標(biāo)志碼:

A

摘要:

齒輪作為變速箱核心零件，需要具備高質(zhì)量性能穩(wěn)定性，以避免因個(gè)別齒輪提前失效導(dǎo)致整個(gè)變速箱損壞。而質(zhì)量穩(wěn)定性齒輪的制造，關(guān)鍵是要有高質(zhì)量穩(wěn)定性齒輪鋼材料的供應(yīng)。以上百爐次Mn-Cr系汽車齒輪鋼為研究對(duì)象，通過(guò)對(duì)其冶煉成分、成品材C波動(dòng)、淬透性、帶狀組織等進(jìn)行統(tǒng)計(jì)和分析，研究了國(guó)內(nèi)Mn-Cr系汽車齒輪鋼質(zhì)量穩(wěn)定性控制水平和技術(shù)。結(jié)果顯示，通過(guò)工藝技術(shù)參數(shù)優(yōu)化，國(guó)內(nèi)Mn-Cr系汽車齒輪鋼可以實(shí)現(xiàn)冶煉終點(diǎn)C偏差穩(wěn)定≤±0.01%，Mn，Cr偏差穩(wěn)定≤±0.05%，成品材截面C波動(dòng)≤0.02%的比例達(dá)95%以上，而淬透性帶寬穩(wěn)定≤4HRC、帶狀組織穩(wěn)定≤2.0級(jí)。通過(guò)大批量生產(chǎn)和實(shí)踐，國(guó)內(nèi)Mn-Cr系汽車齒輪鋼能在達(dá)到高性能的同時(shí)，還具備高的質(zhì)量穩(wěn)定性，這有益于加速推進(jìn)我國(guó)高等級(jí)變速器的開(kāi)發(fā)和應(yīng)用。

Abstract:

As the core part of gearbox, the performance of all gears in gearbox should be stable and consistent to avoid damage to the entire gearbox due to premature failure of individual gears. The key to the manufacturing of quality stability gears is the supply of high-quality stability gear steel materials. In this paper, the Mn-Cr automotive gear steels more than 100 heats are taken as the research object. Through the statistics and analysis of the smelting composition, C fluctuation of rolled bar, hardenability and banded structure, the research on the advanced quality stability control level and technology of domestic Mn-Cr automotive gear steel is completed. The results show that through the optimization of process parameters, the C deviation of smelting end is stably controlled ≤±0.01%, the Mn and Cr deviation are stably controlled ≤±0.05% and the proportion of C fluctuation ≤0.02% of rolled bar cross section is controlled over 95% for Mn-Cr automotive gear steel. Also, the hardenability bandwidth can be controlled ≤4HRC and the banded structure can be controlled ≤2.0 stably. According to the mass production and practice, domestic Mn-Cr gear steel has achieved high performance and high-quality stability, which will be beneficial to accelerating the development and application of advanced transmissions in China.