产品名称

阀套

状态

座面磨损

数量

试加工样

项目

修复最大直径 3.5mm 内的 125°锥面

材料

100Cr6

热处理

真空淬火及深冷时效，硬度 HRC58-62

原件情况:

修复要求:

一. 尺寸

1、熔覆层要覆盖 125°锥面，只覆盖 3.5mm 圆内区域(上图中绿色标注区)，小 孔及其余位置做防护。
2、熔覆层与 0.45mm 或 0.48mm 的小孔连接处不得有断层存在

二.耐磨性、结合 力、硬度

1、磨损部位的新建熔覆层与原有基体结合致密，金相显微分析，径向切片，无 断层现象;
2、要求涂层结合力要好，最好 HF2 级及以上
3、熔覆层表面硬度 HRC69 左右。

Product Name

valve cover

Condition

conical surface wear

Quantity

Test sample

Project

Fix the 125 degree conical surface within the maximum diameter of 3.5mm

Materials

100Cr6

Heat treating

Vacuum quenching and deep cryogenic aging，hardness HRC58‐62

The details of the sample:

The repaired requirements:

1. SIZE

1、The cladding layers should be just covered the 125 degree conical surface within the maximum diameter of 3.5 mm, which is shown in the green area of the figure above. Protective measures should be taken at the hole and the remaining positions。

2、There should not have fault at the connection between the cladding layers and the holes in 0.45mm or 0.48 mm.

2.Wear resistance、 Binding force、 Hardness

1、The new cladding layer of the worn part should be compact with the original matrix. There should not have fault by means of metallographic micro analysis, radial section.
2、Coating bonding ability is required. It would be wonderful if the binding force was above level HF2.

3、The surface hardness of the cladding layer should be about HRC69.