Categories

News

How To Prevent The Cracking Of Stainless Steel Materials?
Jun 14, 2018

Cause of cracking:

The section of borehole location is relatively good, and it can be judged that the expansion ratio is more than that of the usual 304 steel, and the expansion ratio is 0.4~0.5.

Preventive measures:

Heat treatment after -Blanking: annealing at the working hardening part;

- selecting materials with good molding properties to convert steel grades: SUS304J1 and SUS305;

- although there is no direct reason for the improvement of the lubrication condition and the Die surface state and cracking, the ratio of cracking can be reduced by improving the lubrication condition and the surface state of the Die.

Dehiscence

For example: solar water heater, heat exchanger

Opening tube cracking

Causes and Countermeasures of material cracking

Prevention of the cause of the occurrence of the sequence number

1 exceeding the forming limit of the material, machining is maintained within the forming limit.

2 the cleanliness of the material is not enough to improve the cleanliness of the material

The elongation rate of 3 material is not enough for annealing treatment

Causes and Countermeasures of cracking in welding parts:

Prevention of the cause of the occurrence of the sequence number

1 poor welding leads to suitable welding conditions on unwelded joints.

2 attention should be paid to the poor cutting edge of welded parts.

3 welding parts contamination (oil, moisture, dust removal, welding pollution, set the appropriate welding speed.

4 fast welding cause

5 did not pay attention to the protection and combustion of gas use, so that the oxidation of welding parts to protect and seriously manage the gas.

6 exceeding the limitation of the welding part processing limit, expanding the work within the normal processing limit.

Speed adjusting speed of 7 tube expansion

8 material cleanliness improves the cleanliness of the material

The elongation rate of 9 material is not enough for annealing treatment


  • QR CODE
  • facebook