5. 1 一般要求
5. 1. 1 有粘附層的螺栓擰人螺母或螺孔時，螺母和螺孔應倒角。
5. 1. 2 有粘附層的螺栓擰緊過程應不超過 5 min。
5 . 1. 3 推薦固化溫度不小于10 ℃。
注：當固化溫度小于 10 ℃ 時，将延長固化時間，當固化溫度小于 0 ℃ 時，将導緻不能簡化。
5. 1.4 有粘附層的螺栓不應重複使用。當采用新的有粘附層螺栓時，應采用新的螺母；或先使用絲錐将原有螺孔或焊接螺母的殘餘粘附層清除後，再采用新的有粘附層螺栓。
5. 1. 5 有粘附層螺栓應防潮，在正常保管的情況下，應保證至少 4 年内性能要求不發生變化。如果有粘附層螺栓性能要求未發生變化，則粘附層的顏色變化應不影響有粘附層蝶栓的性能要求。
5.2 預塗部位及長度
5. 2. 1 基本要求。
5.2.1.1 應确保螺栓和試驗螺母擰緊後的旋合部位位于粘附層長度範圍内。
5.2.1.2 粘附層的殘餘物不應影響螺栓的旋入。
5.2.2 标準預塗。
螺栓标準預塗部位及粘附層長度按下圖中的規定．尺寸 α 範圍内不應有粘附層。
5.2.3 特殊預塗。
對于螺絞旋合長度大于 1d 、機械性能等級低于 8. 8 或頭部承載能力低的螺栓，應根據機械性能等級或試驗确定預塗部位及粘附層長度。
螺栓特殊預塗部位及粘附層長度按下圖的規定。尺寸 α 範圍内不應有粘附層。
5.3 鎖固要求
5.3.1 技術要求．
粘附層在不同環境條件下的扭矩要求、扭矩試驗方法及相應的應用場合按 表1 的規定。
表 1
| 類 型 | 環 境 條 件 | 扭 矩 要 求 | 扭矩試驗方法 | 應 用 場 合 | ||||||
| 預緊螺栓連接 | 不預緊螺栓連接 | A | S | B | ||||||
| 緊固扭矩 TA 松動扭矩 TLB≥0.9TA 擰出扭矩 Tout | 擰入扭矩 Tin 松動扭矩 TLB 擰出扭矩 Tout | |||||||||
| 性 能a | 耐 溫 性 | 室溫 | 23 ℃ ± 5 ℃，相對濕度不大于 65% | 表 2 | 表 3 | 6.3 | ○ | ○ | ○ | |
| 高溫 | 100 ℃放置 3 h | 表 2 | 表 3 | ○ | ○ | ─ | ||||
| 150 ℃放置 3 h | ─ | ─ | ○ | |||||||
| 長時間室溫 | 100 ℃放置 1000 h | ─ | 表 3 | ○ | ○ | ─ | ||||
| 150 ℃放置 1000 h | ─ | ─ | ○ | |||||||
| 耐 腐 蝕b | 室溫（23 ℃ ± 5 ℃）下在燃油中放置 7 天 | 表 2 | ─ | 6.4 | ○ | ○ | ○ | |||
| 90 ℃的冷卻液、水、乙二醇中放置 7 天，再冷卻至室溫（23 ℃ ± 5 ℃） | ||||||||||
| 120 ℃的油、潤滑油、液壓油中放置 7 天，再冷卻至室溫（23 ℃ ± 5 ℃） | ||||||||||
| 90 ℃的制動液中放置 7 天，再冷卻至室溫（23 ℃ ± 5 ℃） | ||||||||||
| 螺紋摩擦因數c | 有粘附層螺栓的螺紋摩擦因數範圍 | μs = 0.10~0.16 | 6.5 | ○ | ─ | ○ | ||||
| 系 統d （扭矩） | 無 潤 滑 表 面 | 室溫 | 23 ℃ ± 5 ℃，相對濕度不大于 65% | 表 2 | 表 3 | 6.3 | ○ | ○ | ○ | |
| 高溫 | 100 ℃放置 3 h | ○ | ○ | ─ | ||||||
| 100 ℃放置 3 h | ─ | ─ | ○ | |||||||
| 潤 滑 表 面f | 室溫e | 23 ℃ ± 5 ℃，相對濕度不大于 65% | 有粘附層 | 表 2 | 表 3 | 6.3、圖3 | ○ | ○ | ○ | |
| 無粘附層 | TL > 0. 4 TA | ─ | ○ | ○ | ○ | |||||
| 高溫 | 100 ℃放置 3 h | 有粘附層 | TLB > (0. 44~0.48) TA | ─ | ○ | ○ | ─ | |||
| 無粘附層 | TL > 0. 4 TA | ─ | ○ | ○ | ─ | |||||
| 150 ℃放置 3 h | 有粘附層 | TLB > (0. 44~0.48) TA | ─ | ─ | ─ | ○ | ||||
| 無粘附層 | TL > 0. 4 TA | ─ | ─ | ─ | ○ | |||||
注： 如果在螺栓的鋅片塗層、封閉劑、滲有潤滑材料的塗料或另塗潤滑油的表面上施加粘附層時，會影響粘附層的附着強度。
a. 性能試險由粘附層制造商實施，作為粘附層的型式試驗。
b. 其他介質和存放溫度由供需雙方協商确定。
c. 作為系統要求，僅适用于量產件首檢。應注意螺紋摩擦因數試驗對螺紋長度的限制。
d. 系統試驗由粘附層施加方實施，作為批量生產過程的試驗。在争議情況下應采用 6.3 。
e. 粘附層在高溫下無法滿足表 2 或表 3 的規定。
f. 若在潤滑表面上增加粘附層，粘附層的試驗按圖 3 規定。
5.3.2 扭矩值。
5.3.2.1 室溫（ 23 ℃ 士5 ℃，相對濕度不大于65% ）、高溫（100 ℃和150 ℃）條件下，預緊螺栓連接的扭矩值按 表 2 的規定。
表 2 單位：N•m
| 螺 紋 規 格 | 緊固扭矩 TAa | 松動扭矩 TLB ≥ 0.9 TA | 擰出扭矩 Toutb | ||||
| 5.6、5.8 | 8.8、10.9、12.9 | 5.6、5.8 | 8.8、10.9、12.9 | max | |||
| M3 | ─ | ─ | 0.6 | 1.2 | 0.5 | 1.1 | 1.5 |
| M4 | ─ | ─ | 1.3 | 2.8 | 1.2 | 2.5 | 3.0 |
| M5 | ─ | ─ | 2.6 | 5.5 | 2.3 | 5.0 | 6.5 |
| M6 | ─ | ─ | 4.5 | 9.5 | 4.1 | 8.6 | 10.0 |
| M8 | M8×1 | ─ | 11.0 | 23.0 | 9.9 | 20.7 | 26.0 |
| M10 | M10×1.25 | ─ | 22.0 | 46.0 | 19.8 | 41.4 | 55.0 |
| M12 | M12×1.25 | M12×1.5 | 38.0 | 79.0 | 34.2 | 71.1 | 95.0 |
| M14 | M14×1.5 | ─ | 60.0 | 125.0 | 54.0 | 112.5 | 160.0 |
| M16 | M16×1.5 | ─ | 90.0 | 195.0 | 81.0 | 175.5 | 250.0 |
| M18 | M18×1.5 | M18×2 | 128.0 | 280.0 | 115.0 | 252.0 | 335.0 |
| M20 | M20×1.5 | M20×2 | 176.0 | 390.0 | 158.0 | 351.0 | 500.0 |
| M22 | M22×1.5 | M22×2 | 240.0 | 530.0 | 216.0 | 477.0 | 800.0 |
| M24 | M24×2 | ─ | 310.0 | 670.0 | 279.0 | 603.0 | 1050.0 |
注: 1. 當旋合長度＜ 0.8d 時，可減小松動扭矩 TB 值，減小值由供需雙方協商。
2. 當螺紋無法避免沾有油、油脂這類潤滑材料時，松動扭矩 TLB應小于本表規定值。
3. 不鏽鋼螺栓的扭矩值按本表 5.6 或 5.8 級的規定。
a. 根據總摩擦因數 μ=0.12 和 90% ReL（5.6級）的最小值或 90% RPf 的最小值（5.8級）或 90% RP0.2 的最小值 （8.8級、10.9級和12.9級）
确定（見 GB/T 3098.1）。
b. 用于保護被拆卸的緊固件。
5.3.2.2 室溫（ 23 ℃ 士5 ℃，相對濕度不大于 65% ）、高溫（ 100 ℃ 和 150 ℃）條件下，不預緊螺栓連接的扭矩值按 表 3 的規定。
表 3 單位：N•m
| 螺 紋 規 格 | 擰入扭矩 Tin | 松動扭矩 TLB | 擰出扭矩 Tout | ||
| max | min | max | |||
| M3 | ─ | ─ | 0.1 | 0.2 | 1.5 |
| M4 | ─ | ─ | 0.2 | 0.4 | 3.0 |
| M5 | ─ | ─ | 0.5 | 1.0 | 6.5 |
| M6 | ─ | ─ | 0.8 | 1.8 | 10.0 |
| M8 | M8×1 | ─ | 1.5 | 4.0 | 26.0 |
| M10 | M10×1.25 | ─ | 3.0 | 10.0 | 55.0 |
| M12 | M12×1.25 | M12×1.5 | 5.0 | 16.0 | 95.0 |
| M14 | M14×1.5 | ─ | 9.0 | 22.0 | 160.0 |
| M16 | M16×1.5 | ─ | 11.0 | 35.0 | 250.0 |
| M18 | M18×1.5 | M18×2 | 12.0 | 40.0 | 335.0 |
| M20 | M20×1.5 | M20×2 | 14.0 | 45.0 | 500.0 |
| M22 | M22×1.5 | M22×2 | 16.0 | 65.0 | 800.0 |
| M24 | M24×2 | ─ | 18.0 | 90.0 | 1050.0 |
注：當螺紋無法避免沾有油、油脂這類潤滑材料時，松動扭矩 TLB 應小于本表規定值。
5.4 密封要求
有粘附層的螺栓與螺孔或螺母旋合後應能承受 0.1 MPa 壓力下保持 2 min 不洩漏。
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