CARRS Q10 From Kind & Co

Q10

TYPICAL ANALYSIS

C	0.36	Si	0.25
Mn	0.40	Cr	5.20
Mo	1.90	V	0.55

CHARACTERISTICS
Q10 is a excellent general purpose hot work tool steel. Developed for the most demanding applications. It has exceptional mechanical and heat resistance properties.

Q10 was developed as an improvement to traditional hot work steels. Offering both increased toughness and improved heat resistance, improving the efficiency of tooling, resulting in an increase in productivity and thereby reduction in costs.]

To give the best possible mechanical properties, Q10 is manufactured with the lowest level of trace elements..

TYPICAL APPLICATIONS

Q10 can be used with excellent results for applications with high levels of thermal and mechanical stress
•	Forging die blocks
•	Tools for the extrusion industries - Stems, Inner Liners, Sleeves, Die Holders, Mandrels, Dummy Blocks
•	Hot Forming Tools

HEAT TREATMENT

STRESS RELIEVING
a) Inert gas atmosphere (preferred) Raise temperature to the last tempering temperature minus 30°C. Hold for a minimum of 6 hours. Cool slowly in still air without the use of forced draught or grids.
b) Conventional furnace Raise temperature to 480°C max. hold for a minimum of 6 hours. Cool slowly in still air without the use of forced draught or grids

HARDENING
Preheat in two stages to 650°C and 850°C allowing sufficient time for equalisation at each stage (minimum 30 minutes). Raise to the hardening temperature of 1,010/1,020°C, allow to equalise then hold for 45 minutes.

TTT Diagram

TEMPERING
Double tempering is essential and triple tempering beneficial.

QUENCHING
Quench in a vacuum furnace in Nitrogen to 100°C. To reduce stress, interrupt quench at 440°C for 30 mins. Temper immediately while tools are still warm.

	IMPACT STRENGTH The pictures on the right contrast the results of an impact test on samples of TQ1 (left) and H13 (right). The H13 material is Electro Slag Refined steel and complies with the Diecasting Quality Standard NADCA 207-97.
	RESISTANCE TO THERMAL SHOCK The pictures on the left show the difference in resistance to thermal shock between TQ1 and H13 of a similar standard to that

CASE STUDY
The picture on the left shows part of the 80,000th component from a diecasting tool in H11 material produced to a standard in excess of NADCA 207-97 (the diecasting industry benchmark specification). Considerable break-up is evident and the tool would not be expected to continue long in production. The picture on the right is of the same part of the 80,000th component from a tool in TQ1. Note that there is no evidence of significant wear or break-up and there is clearly much life left in the tool.