ホウ化処理鋼の機械的性質に及ぼす炭素再分布層厚さと炭素含有量の影響
スポンサーリンク
概要
- 論文の詳細を見る
"The boronized process is famous as one of the chemical methods to achieve case hardening of steels. There have been a number of studies concerning this treatment process and boronized layer. Consequently, it becomes well-known that the boronized layer has above 1400 Vickers hardness and a high resistance especially against wear. Also the present authors have reported the residual stress distribution by using X-ray method, the effects of thickness and compressive residual stress of boronized layer on bending fatigue strength properties and the results of fatigue crack observation. On the other hand, few reports exist on the tensile mechanical properties. One of the characteristics in boronized steels is the formation of a carbon redistributed layer below the boronized layer. It is expected that this carbon redistributed layer contributes to the improvement of the total tensile and yield strength. In the present study, tensile tests were conducted on mechanical and structural steel specimens of different diameters, which contained various amounts of carbon and had different thickness of boronized layers. The Effects of the thickness of boronized layer and the carbon redistributed layer on tensile strength were investigated. The results obtained are summarized as follows: (1) For SCM420 and S50C, both the tensile and the yield strength were improved with increasing thickness of the carbon redistributed layer. (2) Rupture elongation became less with increasing thickness of the boronized layer. (3) As the carbon content became more, the ratio of boronized area to carbon redistributed area effective in improving tensile and yield strengths became smaller. The ratio was 45% in SCM 420, and 25% in S50C. (4) When the carbon redistributed layer became thicker than the tensile residual stress distributed layer, both the tensile and yield strengths improved.
- 1984-08-15
著者
関連論文
- 急冷凝固した 18-8 ステンレス鋼における腐食特性の冷却速度依存性
- 鉄鋼表面へのクロムならびにチタン炭化物の二層被覆
- 後熱処理したTiC被覆鋼のX線残留応力分布測定(X線材料強度小特集)
- ホウ化処理鋼のすべり磨耗過程中でのX線的パラメータの変化
- ホウ化処理鋼の機械的性質に及ぼす炭素再分布層厚さと炭素含有量の影響
- ホウ化処理鋼の曲げ疲労き裂の観察
- ホウ化処理鋼の曲げ疲労強度特性に及ぼすホウ化層厚さと圧縮残留応力の影響(X線材料強度小特集)
- ホウ化処理鋼のX線残留応力測定
- 301 ホウ化鉄のヤング率及び X 線残留応力測定
- 7-3黄銅のアンモニアふん囲気中での応力腐食割れ過程中の表面応力変化およびき裂の成長挙動
- アルミニウム拡散被覆処理したS45C鋼の衝撃特性
- 鉄鋼のアルミニウム被膜における第三元素の影響
- 純正炭化物の新製法原理
- 原子炉用鋼のボロン化(第二報)
- SUS304 オーステナイトステンレス鋼の窒化層の再窒化挙動
- オ-ステナイト系ステンレス鋼の窒化速度の異常温度依存性
- コロイド状金属の極微作用(第1報)
- Al-4.5% Cu 合金鋳塊の表面層における初晶の形態について
- チタンの電解ホウ化処理
- 表面酸化皮膜除去処理を省略したNH3-RX混合ガスによるSUS430ステンレス鋼の表面硬化処理について
- 表面硬化の速度論--金属の拡散を中心として(速度論シリ-ズ-5-)
- Al-4.5%Cu合金鋳塊表面層におけるディスク組織構造の形成機構
- Al-4.5mass%Cu合金鋳物の表面偏析について
- イオンプレーティング法により形成された皮膜の内部応力
- Ti-15Mo-5Zr-3Al合金の表面改質-溶体化過程におけるイオン窒化-
- ホウ化処理によるチタンの表面改質 (ボロン処理)
- 電析Ni-S合金のぜい性
- High Temperature Sulfuration of Aluminum Diffusion Coated Steel.